Upstream information

CVE-2026-56866 at MITRE

Description

When http.Transport sends an HTTP/1 CONNECT request with a non-empty Request.Body, it writes the body directly to the connection without framing after the request headers. If the server rejects the CONNECT request with a non-2xx keep-alive response, Transport returns the connection to the idle pool. Because CONNECT requests do not have a request body, the server may interpret the trailing body bytes as a subsequent pipelined HTTP/1.1 request on the connection, leaving the pooled connection desynchronized and causing the next caller that reuses it to read the response to the injected request. In reverse proxies (including httputil.ReverseProxy) that forward CONNECT requests through a shared Transport, this can lead to cross-user response poisoning.

SUSE information

Overall state of this security issue: Pending

This issue is currently rated as having important severity.

CVSS v3 Scores
CVSS detail SUSE
Base Score 8.7
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Changed
Confidentiality Impact High
Integrity Impact High
Availability Impact None
CVSSv3 Version 3.1

Note from the SUSE Security Team on the go1.* package

SUSE only supports the current and the previous GO language releases.

SUSE Bugzilla entry: 1284767 [NEW]

No SUSE Security Announcements cross referenced.

List of packages in QA

Product(s) Package(s)
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS
  • go1.26 >= 1.26.9-150000.1.33.1
  • go1.26-doc >= 1.26.9-150000.1.33.1
  • go1.26-race >= 1.26.9-150000.1.33.1
  • go1.27 >= 1.27.2-150000.1.12.1
  • go1.27-doc >= 1.27.2-150000.1.12.1
  • go1.27-race >= 1.27.2-150000.1.12.1
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS
  • go1.26 >= 1.26.9-150000.1.33.1
  • go1.26-doc >= 1.26.9-150000.1.33.1
  • go1.26-race >= 1.26.9-150000.1.33.1
  • go1.27 >= 1.27.2-150000.1.12.1
  • go1.27-doc >= 1.27.2-150000.1.12.1
  • go1.27-race >= 1.27.2-150000.1.12.1
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS
  • go1.26 >= 1.26.9-150000.1.33.1
  • go1.26-doc >= 1.26.9-150000.1.33.1
  • go1.26-race >= 1.26.9-150000.1.33.1
  • go1.27 >= 1.27.2-150000.1.12.1
  • go1.27-doc >= 1.27.2-150000.1.12.1
  • go1.27-race >= 1.27.2-150000.1.12.1
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS
  • go1.26 >= 1.26.9-150000.1.33.1
  • go1.26-doc >= 1.26.9-150000.1.33.1
  • go1.26-race >= 1.26.9-150000.1.33.1
  • go1.27 >= 1.27.2-150000.1.12.1
  • go1.27-doc >= 1.27.2-150000.1.12.1
  • go1.27-race >= 1.27.2-150000.1.12.1
SUSE Linux Enterprise Module for Development Tools 15 SP7
  • go1.26 >= 1.26.9-150000.1.33.1
  • go1.26-doc >= 1.26.9-150000.1.33.1
  • go1.26-race >= 1.26.9-150000.1.33.1
  • go1.27 >= 1.27.2-150000.1.12.1
  • go1.27-doc >= 1.27.2-150000.1.12.1
  • go1.27-race >= 1.27.2-150000.1.12.1
SUSE Linux Enterprise Server 15 SP7
  • go1.26 >= 1.26.9-150000.1.33.1
  • go1.26-doc >= 1.26.9-150000.1.33.1
  • go1.26-race >= 1.26.9-150000.1.33.1
  • go1.27 >= 1.27.2-150000.1.12.1
  • go1.27-doc >= 1.27.2-150000.1.12.1
  • go1.27-race >= 1.27.2-150000.1.12.1
SUSE Linux Enterprise Desktop 15 SP7
  • go1.26 >= 1.26.9-150000.1.33.1
  • go1.26-doc >= 1.26.9-150000.1.33.1
  • go1.26-race >= 1.26.9-150000.1.33.1
  • go1.27 >= 1.27.2-150000.1.12.1
  • go1.27-doc >= 1.27.2-150000.1.12.1
  • go1.27-race >= 1.27.2-150000.1.12.1
SUSE Linux Enterprise Server for SAP Applications 15 SP7
  • go1.26 >= 1.26.9-150000.1.33.1
  • go1.26-doc >= 1.26.9-150000.1.33.1
  • go1.26-race >= 1.26.9-150000.1.33.1
  • go1.27 >= 1.27.2-150000.1.12.1
  • go1.27-doc >= 1.27.2-150000.1.12.1
  • go1.27-race >= 1.27.2-150000.1.12.1
SUSE Linux Enterprise Server 15 SP4-LTSS
  • go1.26 >= 1.26.9-150000.1.33.1
  • go1.26-doc >= 1.26.9-150000.1.33.1
  • go1.26-race >= 1.26.9-150000.1.33.1
  • go1.27 >= 1.27.2-150000.1.12.1
  • go1.27-doc >= 1.27.2-150000.1.12.1
  • go1.27-race >= 1.27.2-150000.1.12.1
SUSE Linux Enterprise Server 15 SP4-LTSS
  • go1.26 >= 1.26.9-150000.1.33.1
  • go1.26-doc >= 1.26.9-150000.1.33.1
  • go1.26-race >= 1.26.9-150000.1.33.1
  • go1.27 >= 1.27.2-150000.1.12.1
  • go1.27-doc >= 1.27.2-150000.1.12.1
  • go1.27-race >= 1.27.2-150000.1.12.1
SUSE Linux Enterprise Server 15 SP5-LTSS
  • go1.26 >= 1.26.9-150000.1.33.1
  • go1.26-doc >= 1.26.9-150000.1.33.1
  • go1.26-race >= 1.26.9-150000.1.33.1
  • go1.27 >= 1.27.2-150000.1.12.1
  • go1.27-doc >= 1.27.2-150000.1.12.1
  • go1.27-race >= 1.27.2-150000.1.12.1
SUSE Linux Enterprise Server 15 SP5-LTSS
  • go1.26 >= 1.26.9-150000.1.33.1
  • go1.26-doc >= 1.26.9-150000.1.33.1
  • go1.26-race >= 1.26.9-150000.1.33.1
  • go1.27 >= 1.27.2-150000.1.12.1
  • go1.27-doc >= 1.27.2-150000.1.12.1
  • go1.27-race >= 1.27.2-150000.1.12.1
SUSE Linux Enterprise Server 15 SP6-LTSS
  • go1.26 >= 1.26.9-150000.1.33.1
  • go1.26-doc >= 1.26.9-150000.1.33.1
  • go1.26-race >= 1.26.9-150000.1.33.1
  • go1.27 >= 1.27.2-150000.1.12.1
  • go1.27-doc >= 1.27.2-150000.1.12.1
  • go1.27-race >= 1.27.2-150000.1.12.1
SUSE Linux Enterprise Server 15 SP6-LTSS
  • go1.26 >= 1.26.9-150000.1.33.1
  • go1.26-doc >= 1.26.9-150000.1.33.1
  • go1.26-race >= 1.26.9-150000.1.33.1
  • go1.27 >= 1.27.2-150000.1.12.1
  • go1.27-doc >= 1.27.2-150000.1.12.1
  • go1.27-race >= 1.27.2-150000.1.12.1
SUSE Linux Enterprise Server for SAP Applications 15 SP4
  • go1.26 >= 1.26.9-150000.1.33.1
  • go1.26-doc >= 1.26.9-150000.1.33.1
  • go1.26-race >= 1.26.9-150000.1.33.1
  • go1.27 >= 1.27.2-150000.1.12.1
  • go1.27-doc >= 1.27.2-150000.1.12.1
  • go1.27-race >= 1.27.2-150000.1.12.1
SUSE Linux Enterprise Server for SAP Applications 15 SP5
  • go1.26 >= 1.26.9-150000.1.33.1
  • go1.26-doc >= 1.26.9-150000.1.33.1
  • go1.26-race >= 1.26.9-150000.1.33.1
  • go1.27 >= 1.27.2-150000.1.12.1
  • go1.27-doc >= 1.27.2-150000.1.12.1
  • go1.27-race >= 1.27.2-150000.1.12.1
SUSE Linux Enterprise Server for SAP Applications 15 SP6
  • go1.26 >= 1.26.9-150000.1.33.1
  • go1.26-doc >= 1.26.9-150000.1.33.1
  • go1.26-race >= 1.26.9-150000.1.33.1
  • go1.27 >= 1.27.2-150000.1.12.1
  • go1.27-doc >= 1.27.2-150000.1.12.1
  • go1.27-race >= 1.27.2-150000.1.12.1

Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.

Product(s) Source package State
Products under general support and receiving all security fixes.
SUSE Linux Enterprise Desktop 15 SP7 go Not affected
SUSE Linux Enterprise Desktop 15 SP7 go1.25 Not affected
SUSE Linux Enterprise Desktop 15 SP7 go1.25-openssl Not affected
SUSE Linux Enterprise Desktop 15 SP7 go1.26 In progress
SUSE Linux Enterprise Desktop 15 SP7 go1.26-openssl Affected
SUSE Linux Enterprise Desktop 15 SP7 go1.27 In progress
SUSE Linux Enterprise Module for Development Tools 15 SP7 go Not affected
SUSE Linux Enterprise Module for Development Tools 15 SP7 go1.25 Not affected
SUSE Linux Enterprise Module for Development Tools 15 SP7 go1.25-openssl Not affected
SUSE Linux Enterprise Module for Development Tools 15 SP7 go1.26 In progress
SUSE Linux Enterprise Module for Development Tools 15 SP7 go1.26-openssl Affected
SUSE Linux Enterprise Module for Development Tools 15 SP7 go1.27 In progress
SUSE Linux Enterprise Module for Package Hub 15 SP7 go1.7 Not affected
SUSE Linux Enterprise Module for Package Hub 15 SP7 go1.8 Not affected
SUSE Linux Enterprise Server 15 SP7 go Not affected
SUSE Linux Enterprise Server 15 SP7 go1.25 Not affected
SUSE Linux Enterprise Server 15 SP7 go1.25-openssl Not affected
SUSE Linux Enterprise Server 15 SP7 go1.26 In progress
SUSE Linux Enterprise Server 15 SP7 go1.26-openssl Affected
SUSE Linux Enterprise Server 15 SP7 go1.27 In progress
SUSE Linux Enterprise Server 16.0 go Not affected
SUSE Linux Enterprise Server 16.0 go1.25 Not affected
SUSE Linux Enterprise Server 16.0 go1.25-openssl Not affected
SUSE Linux Enterprise Server 16.0 go1.26 In progress
SUSE Linux Enterprise Server 16.0 go1.26-openssl Affected
SUSE Linux Enterprise Server 16.0 go1.27 In progress
SUSE Linux Enterprise Server 16.1 go Not affected
SUSE Linux Enterprise Server 16.1 go1.25 Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP7 go Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP7 go1.25 Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP7 go1.25-openssl Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP7 go1.26 In progress
SUSE Linux Enterprise Server for SAP Applications 15 SP7 go1.26-openssl Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP7 go1.27 In progress
SUSE Linux Enterprise Server for SAP applications 16.0 go Not affected
SUSE Linux Enterprise Server for SAP applications 16.0 go1.25 Not affected
SUSE Linux Enterprise Server for SAP applications 16.0 go1.25-openssl Not affected
SUSE Linux Enterprise Server for SAP applications 16.0 go1.26 In progress
SUSE Linux Enterprise Server for SAP applications 16.0 go1.26-openssl Affected
SUSE Linux Enterprise Server for SAP applications 16.0 go1.27 In progress
SUSE Linux Enterprise Server for SAP applications 16.1 go Not affected
SUSE Linux Enterprise Server for SAP applications 16.1 go1.25 Not affected
openSUSE Leap 16.0 go Not affected
openSUSE Leap 16.0 go1.25 Not affected
openSUSE Leap 16.0 go1.25-openssl Not affected
openSUSE Leap 16.0 go1.26 Affected
openSUSE Leap 16.0 go1.26-openssl Affected
openSUSE Leap 16.0 go1.27 Affected
Products under Long Term Service Pack support and receiving important and critical security fixes.
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS go Not affected
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS go1.25 Not affected
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS go1.25-openssl Not affected
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS go1.26 In progress
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS go1.26-openssl Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS go1.27 In progress
SUSE Linux Enterprise High Performance Computing 15 SP5 go Not affected
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS go Not affected
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS go1.25 Not affected
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS go1.25-openssl Not affected
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS go1.26 In progress
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS go1.26-openssl Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS go1.27 In progress
SUSE Linux Enterprise Module for Development Tools 15 SP4 go Not affected
SUSE Linux Enterprise Module for Development Tools 15 SP5 go Not affected
SUSE Linux Enterprise Module for Development Tools 15 SP6 go Not affected
SUSE Linux Enterprise Module for Development Tools 15 SP6 go1.25 Not affected
SUSE Linux Enterprise Module for Development Tools 15 SP6 go1.25-openssl Not affected
SUSE Linux Enterprise Server 15 SP4 go Not affected
SUSE Linux Enterprise Server 15 SP4-LTSS go Not affected
SUSE Linux Enterprise Server 15 SP4-LTSS go1.25 Not affected
SUSE Linux Enterprise Server 15 SP4-LTSS go1.25-openssl Not affected
SUSE Linux Enterprise Server 15 SP4-LTSS go1.26 In progress
SUSE Linux Enterprise Server 15 SP4-LTSS go1.26-openssl Affected
SUSE Linux Enterprise Server 15 SP4-LTSS go1.27 In progress
SUSE Linux Enterprise Server 15 SP5 go Not affected
SUSE Linux Enterprise Server 15 SP5-LTSS go Not affected
SUSE Linux Enterprise Server 15 SP5-LTSS go1.25 Not affected
SUSE Linux Enterprise Server 15 SP5-LTSS go1.25-openssl Not affected
SUSE Linux Enterprise Server 15 SP5-LTSS go1.26 In progress
SUSE Linux Enterprise Server 15 SP5-LTSS go1.26-openssl Affected
SUSE Linux Enterprise Server 15 SP5-LTSS go1.27 In progress
SUSE Linux Enterprise Server 15 SP6 go Not affected
SUSE Linux Enterprise Server 15 SP6 go1.25 Not affected
SUSE Linux Enterprise Server 15 SP6 go1.25-openssl Not affected
SUSE Linux Enterprise Server 15 SP6-LTSS go Not affected
SUSE Linux Enterprise Server 15 SP6-LTSS go1.25 Not affected
SUSE Linux Enterprise Server 15 SP6-LTSS go1.25-openssl Not affected
SUSE Linux Enterprise Server 15 SP6-LTSS go1.26 In progress
SUSE Linux Enterprise Server 15 SP6-LTSS go1.26-openssl Affected
SUSE Linux Enterprise Server 15 SP6-LTSS go1.27 In progress
SUSE Linux Enterprise Server for SAP Applications 15 SP4 go Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP4 go1.25 Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP4 go1.25-openssl Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP4 go1.26 In progress
SUSE Linux Enterprise Server for SAP Applications 15 SP4 go1.26-openssl Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP4 go1.27 In progress
SUSE Linux Enterprise Server for SAP Applications 15 SP5 go Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP5 go1.25 Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP5 go1.25-openssl Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP5 go1.26 In progress
SUSE Linux Enterprise Server for SAP Applications 15 SP5 go1.26-openssl Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP5 go1.27 In progress
SUSE Linux Enterprise Server for SAP Applications 15 SP6 go Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP6 go1.25 Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP6 go1.25-openssl Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP6 go1.26 In progress
SUSE Linux Enterprise Server for SAP Applications 15 SP6 go1.26-openssl Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP6 go1.27 In progress
Products past their end of life and not receiving proactive updates anymore.
SUSE Enterprise Storage 7.1 go Not affected
SUSE Enterprise Storage 7.1 go1.25 Not affected
SUSE Enterprise Storage 7.1 go1.25-openssl Not affected
SUSE Linux Enterprise Desktop 15 SP3 go Not affected
SUSE Linux Enterprise Desktop 15 SP4 go Not affected
SUSE Linux Enterprise Desktop 15 SP5 go Not affected
SUSE Linux Enterprise Desktop 15 SP6 go Not affected
SUSE Linux Enterprise Desktop 15 SP6 go1.25 Not affected
SUSE Linux Enterprise Desktop 15 SP6 go1.25-openssl Not affected
SUSE Linux Enterprise High Performance Computing 15 SP3 go Not affected
SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS go Not affected
SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS go Not affected
SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS go1.25 Not affected
SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS go1.25-openssl Not affected
SUSE Linux Enterprise High Performance Computing 15 SP4 go Not affected
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS go Not affected
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS go1.25 Not affected
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS go1.25-openssl Not affected
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS go1.26 In progress
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS go1.26-openssl Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS go1.27 In progress
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS go Not affected
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS go1.25 Not affected
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS go1.25-openssl Not affected
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS go1.26 In progress
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS go1.26-openssl Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS go1.27 In progress
SUSE Linux Enterprise Module for Development Tools 15 SP3 go Not affected
SUSE Linux Enterprise Module for Package Hub 15 SP5 go1.7 Not affected
SUSE Linux Enterprise Module for Package Hub 15 SP5 go1.8 Not affected
SUSE Linux Enterprise Module for Package Hub 15 SP6 go1.7 Not affected
SUSE Linux Enterprise Module for Package Hub 15 SP6 go1.8 Not affected
SUSE Linux Enterprise Real Time 15 SP3 go Not affected
SUSE Linux Enterprise Real Time 15 SP4 go Not affected
SUSE Linux Enterprise Server 15 SP3 go Not affected
SUSE Linux Enterprise Server 15 SP3-BCL go Not affected
SUSE Linux Enterprise Server 15 SP3-LTSS go Not affected
SUSE Linux Enterprise Server 15 SP3-LTSS go1.25 Not affected
SUSE Linux Enterprise Server 15 SP3-LTSS go1.25-openssl Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP3 go Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP3 go1.25 Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP3 go1.25-openssl Not affected
SUSE Manager Proxy 4.2 go Not affected
SUSE Manager Proxy 4.3 go Not affected
SUSE Manager Retail Branch Server 4.2 go Not affected
SUSE Manager Retail Branch Server 4.3 go Not affected
SUSE Manager Server 4.2 go Not affected
SUSE Manager Server 4.3 go Not affected
openSUSE Leap 15.3 go Not affected
openSUSE Leap 15.3 go1.7 Not affected
openSUSE Leap 15.3 go1.8 Not affected
openSUSE Leap 15.4 go Not affected
openSUSE Leap 15.4 go1.7 Not affected
openSUSE Leap 15.4 go1.8 Not affected
openSUSE Leap 15.5 go Not affected
openSUSE Leap 15.5 go1.7 Not affected
openSUSE Leap 15.5 go1.8 Not affected
openSUSE Leap 15.6 go Not affected
openSUSE Leap 15.6 go1.25 Not affected
openSUSE Leap 15.6 go1.25-openssl Not affected
openSUSE Leap 15.6 go1.26 Affected
openSUSE Leap 15.6 go1.26-openssl Affected
openSUSE Leap 15.6 go1.7 Not affected
openSUSE Leap 15.6 go1.8 Not affected
Products at an unknown state of their lifecycle.
SUSE Linux Enterprise Server 16.2 go Not affected
SUSE Linux Enterprise Server 16.2 go1.26 Affected
SUSE Linux Enterprise Server 16.2 go1.26-openssl Affected
SUSE Linux Enterprise Server 16.2 go1.27 Affected
SUSE Linux Enterprise Server for NVIDIA 16.1 go Not affected
Container Status
bci/golang:1.25-openssl go1.25-opensslNot affected
bci/golang:1.25 go1.25Not affected
bci/golang go1.26-opensslAffected
bci/golang:1.26 go1.26Affected
bci/golang go1.27Affected

SUSE Timeline for this CVE

CVE page created: Fri Oct 9 11:46:55 2026
CVE page last modified: Fri Oct 9 17:45:43 2026