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.
History

Fri, 23 Oct 2026 05:30:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:openshift:4 cpe:/a:redhat:openshift:4.14::el9
cpe:/a:redhat:openshift:4.15::el9
References

Thu, 15 Oct 2026 19:30:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:openshift:4.18::el9
References

Wed, 07 Oct 2026 14:30:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:openshift:4.19::el9
References

Tue, 06 Oct 2026 23:30:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:openshift:4.20::el9
References

Tue, 06 Oct 2026 10:15:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:openshift:4.21::el9
cpe:/a:redhat:openshift:4.22::el9
References

Thu, 03 Sep 2026 16:45:00 +0000

Type Values Removed Values Added
First Time appeared Redhat openshift Container Platform
Vendors & Products Redhat openshift Container Platform

Wed, 02 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Important


Tue, 01 Sep 2026 22:00:00 +0000

Type Values Removed Values Added
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.
Title Openshift/oauth-server: openshift/oauth-server: quadratic-time dos via accept-language header underscore bypass on unauthenticated login endpoints
First Time appeared Redhat
Redhat openshift
Weaknesses CWE-407
CPEs cpe:/a:redhat:openshift:4
Vendors & Products Redhat
Redhat openshift
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published: 2026-09-01T15:30:57.749Z

Updated: 2026-10-23T05:08:42.513Z

Reserved: 2026-05-29T13:24:26.096Z

Link: CVE-2026-49329

cve-icon Vulnrichment

Updated: 2026-09-01T17:05:28.400Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-01T16:16:57.760

Modified: 2026-10-23T06:17:06.790

Link: CVE-2026-49329

cve-icon Redhat

Severity : Important

Publid Date: 2026-08-31T20:00:00Z

Links: CVE-2026-49329 - Bugzilla