Upstream information
Description
Distribution is a toolkit to pack, ship, store, and deliver container content. Prior to 3.1.0, in pull-through cache mode, distribution discovers token auth endpoints by parsing WWW-Authenticate challenges returned by the configured upstream registry. The realm URL from a bearer challenge is used without validating that it matches the upstream registry host. As a result, an attacker-controlled upstream (or an attacker with MitM position to the upstream) can cause distribution to send the configured upstream credentials via basic auth to an attacker-controlled realm URL. This vulnerability is fixed in 3.1.0.Upstream Security Advisories:
SUSE information
Overall state of this security issue: Resolved
This issue is currently rated as having moderate severity.
| CVSS detail | CNA (GitHub) | SUSE |
|---|---|---|
| Base Score | 7.5 | 3.1 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N |
| Attack Vector | Network | Network |
| Attack Complexity | Low | High |
| Privileges Required | None | Low |
| User Interaction | None | None |
| Scope | Unchanged | Unchanged |
| Confidentiality Impact | High | Low |
| Integrity Impact | None | None |
| Availability Impact | None | None |
| CVSSv3 Version | 3.1 | 3.1 |
SUSE Security Advisories:
- GHSA-3p65-76g6-3w7r, published Mon Apr 6 17:01:02 CEST 2026
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Please note that this evaluation state might be work in progress, incomplete or outdated.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 High Performance Computing 15 SP7 | helm | Not affected |
| SUSE Linux Enterprise Micro 5.5 | helm | Not affected |
| SUSE Linux Enterprise Module for Containers 15 SP7 | helm | Not affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP7 | helm | Not affected |
| SUSE Linux Enterprise Server 15 SP7 | helm | Not affected |
| SUSE Linux Enterprise Server 16.0 | helm | Not affected |
| SUSE Linux Enterprise Server 16.1 | helm | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | helm | Not affected |
| SUSE Linux Enterprise Server for SAP applications 16.0 | helm | Not affected |
| SUSE Linux Enterprise Server for SAP applications 16.1 | helm | Not affected |
| SUSE Linux Micro 6.0 | helm | Not affected |
| SUSE Linux Micro 6.1 | helm | Not affected |
| SUSE Linux Micro 6.2 | helm | Not affected |
| openSUSE Leap 15.6 | helm | Not affected |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise High Performance Computing 15 SP4 | helm | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | helm | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | helm | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | helm | Not affected |
| SUSE Linux Enterprise Module for Containers 15 SP4 | helm | Not affected |
| SUSE Linux Enterprise Module for Containers 15 SP5 | helm | Not affected |
| SUSE Linux Enterprise Module for Containers 15 SP6 | helm | Not affected |
| SUSE Linux Enterprise Server 15 SP4 | helm | Not affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | helm | Not affected |
| SUSE Linux Enterprise Server 15 SP5 | helm | Not affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | helm | Not affected |
| SUSE Linux Enterprise Server 15 SP6 | helm | Not affected |
| SUSE Linux Enterprise Server 15 SP6-LTSS | helm | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | helm | Not affected |
| SUSE Manager Proxy 4.3 | helm | Not affected |
| SUSE Manager Retail Branch Server 4.3 | helm | Not affected |
| SUSE Manager Server 4.3 | helm | Not affected |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE Enterprise Storage 7.1 | helm | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3 | helm | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS | helm | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | helm | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | helm | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | helm | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP6 | helm | Not affected |
| SUSE Linux Enterprise Module for Containers 15 SP3 | helm | Not affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP3 | helm | Not affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP4 | helm | Not affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP5 | helm | Not affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP6 | helm | Not affected |
| SUSE Linux Enterprise Server 15 SP3 | helm | Not affected |
| SUSE Linux Enterprise Server 15 SP3-BCL | helm | Not affected |
| SUSE Linux Enterprise Server 15 SP3-LTSS | helm | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | helm | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | helm | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | helm | Not affected |
| SUSE Manager Proxy 4.2 | helm | Not affected |
| SUSE Manager Retail Branch Server 4.2 | helm | Not affected |
| SUSE Manager Server 4.2 | helm | Not affected |
| openSUSE Leap 15.3 | helm | Not affected |
| openSUSE Leap 15.4 | helm | Not affected |
| openSUSE Leap 15.5 | helm | Not affected |
| openSUSE Leap Micro 5.5 | helm | Not affected |
| Products at an unknown state of their lifecycle. | ||
| Products | harbor213 | Not affected |
| Container Status | ||
| suse/helm | helm | Not affected |
SUSE Timeline for this CVE
CVE page created: Mon Apr 6 17:27:43 2026CVE page last modified: Fri Apr 10 12:58:57 2026