CVE-2026-44774
Description
A flaw was found in Traefik. A low-privileged tenant with HTTPRoute creation permissions in Traefik's Kubernetes Gateway API provider can bypass security settings. This allows the tenant to expose the REST provider handler and gain live dynamic configuration write access to Traefik. This vulnerability enables unauthorized reconfiguration of routers and services, potentially leading to privilege escalation within the system.
Statement
Red Hat's CVSS 3.1 score (8.3, AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H) matches the CVSS 3.1 vector independently published by the reporting CNA (GitHub Security Advisories, GHSA-96qj-4jj5-wcjc), which also assesses Scope:Unchanged with Confidentiality:Low. The CNA's own CVSS 4.0 base score for this issue is 6.4 (Medium): CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:H/SA:H.
NIST's CVSS 3.1 score of 9.9 (Scope:Changed, Confidentiality:High) is a National Vulnerability Database enrichment re-derivation and is not the score assigned by the reporting CNA.
Exploitation requires an actor who already holds HTTPRoute create/update permission within an allowed tenant namespace of a shared Traefik Gateway API deployment (reflected in PR:L, not an anonymous or unauthenticated attacker), and additionally requires the REST provider to be enabled on that Traefik instance. The vulnerable component (Traefik's own dynamic configuration and routing control plane) and the impacted component (that same Traefik instance's routers and services) are one and the same, so Red Hat assesses Scope:Unchanged as the correct metric, consistent with the CNA's own re-scored vector rather than NIST's enrichment score.
Mitigation
Upgrade Traefik to version 2.11.46 or later (2.x line), 3.6.17 or later (3.6.x line), or 3.7.1 or later (3.7.x line) by installing updated Red Hat OpenShift Dev Spaces releases that ship a fixed traefik-rhel9 container image.
Until updated images are available, limit which principals can create HTTPRoute resources in namespaces where Traefik runs with the Kubernetes Gateway API provider. Disable or tightly restrict the Traefik REST dynamic configuration provider in shared Gateway deployments, and block untrusted use of TraefikService backends that reference @internal handlers.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 8.3 | 9.9 | 8.3 |
| Attack Vector | Network | Network | Network |
| Attack Complexity | Low | Low | Low |
| Privileges Required | Low | Low | Low |
| User Interaction | None | None | None |
| Scope | Unchanged | Changed | Unchanged |
| Confidentiality | Low | High | Low |
| Integrity Impact | High | High | High |
| Availability Impact | High | High | High |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H
NVD: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
cve.org: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H
Understanding the Weakness (CWE)
Other
Technical Impact: Varies by Context
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