CVEvulnerability
CVE-2026-49329
7.5 HIGH
Official page ↗
- Status
- Awaiting Analysis
- Published
- 2026-09-01
- Last modified
- 2026-10-29
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-407
Description
A flaw was found in openshift/oauth-server. The OAuth login and error page endpoints pass the unauthenticated Accept-Language header to golang.org/x/text/language.ParseAcceptLanguage() without input validation. A bypass of the CVE-2022-32149 mitigation exists: the upstream guard counts only '-' characters but the internal BCP 47 scanner aliases '_' to '-' after the guard check. An unauthenticated attacker can send a crafted Accept-Language header using '_' separators to trigger quadratic-time parsing, consuming excessive CPU and denying authentication to all cluster users.
Related
Weakness · CWE (1)
- CWE-407 Inefficient Algorithmic Complexity weakness
References
- https://access.redhat.com/errata/RHSA-2026:74380 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:74383 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:74429 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:74434 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:79039 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:82785 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:82813 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:89715 access.redhat.com
- https://access.redhat.com/security/cve/CVE-2026-49329 access.redhat.com
- https://bugzilla.redhat.com/show_bug.cgi?id=2483248 bugzilla.redhat.com