Upstream information

CVE-2026-57209 at MITRE

Description

Heimdall is a cloud native Identity Aware Proxy and Access Control Decision service. Prior to version 0.17.17, when Heimdall operates in proxy mode, it constructs the Forwarded HTTP header after executing the matched rule pipeline by inserting the incoming request's Host header value directly into the header string without sanitizing commas or semicolons. This allows an attacker to inject additional parameters into the Forwarded header, potentially spoofing IP addresses for upstream services. This issue has been patched in version 0.17.17.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having moderate severity.

CVSS v4 Scores
CVSS detail CNA (GitHub) SUSE
Base Score 7 7
Vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
Attack Vector Network Network
Attack Complexity Low Low
Attack Requirements Present Present
Privileges Required None None
User Interaction None None
Vulnerable System Confidentiality Impact None None
Vulnerable System Integrity Impact None None
Vulnerable System Availability Impact None None
Subsequent System Confidentiality Impact High High
Subsequent System Integrity Impact High High
Subsequent System Availability Impact None None
CVSSv4 Version 4.0 4.0
SUSE Bugzilla entry: 1271956 [NEW]

No SUSE Security Announcements cross referenced.

List of released packages

Product(s) Fixed package version(s) References
openSUSE Tumbleweed
  • heimdall >= 2.2.2-1.1
  • heimdall-frontend >= 2.2.2-1.1
 Patchnames:
openSUSE-Tumbleweed-2026-12397

SUSE Timeline for this CVE

CVE page created: Tue Jul 21 11:35:37 2026
CVE page last modified: Wed Nov 4 14:42:28 2026