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.
Metrics
CVSS 3.1 7.5/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HWeakness enumeration
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat OpenShift Container Platform 4.14 | — |
| Red Hat | Red Hat OpenShift Container Platform 4.15 | — |
| Red Hat | Red Hat OpenShift Container Platform 4.16 | — |
| Red Hat | Red Hat OpenShift Container Platform 4.18 | — |
| Red Hat | Red Hat OpenShift Container Platform 4.19 | — |
| Red Hat | Red Hat OpenShift Container Platform 4.20 | — |
| Red Hat | Red Hat OpenShift Container Platform 4.21 | — |
| Red Hat | Red Hat OpenShift Container Platform 4.22 | — |
| Red Hat | Red Hat OpenShift Container Platform 5 | — |
References
- https://access.redhat.com/errata/RHSA-2026:74380
- https://access.redhat.com/errata/RHSA-2026:74383
- https://access.redhat.com/errata/RHSA-2026:74429
- https://access.redhat.com/errata/RHSA-2026:74434
- https://access.redhat.com/errata/RHSA-2026:79039
- https://access.redhat.com/errata/RHSA-2026:82785
- https://access.redhat.com/errata/RHSA-2026:82813
- https://access.redhat.com/errata/RHSA-2026:89715
- https://access.redhat.com/security/cve/CVE-2026-49329
- https://bugzilla.redhat.com/show_bug.cgi?id=2483248
Timeline
- Published
- Sep 1, 2026
- Last modified
- Oct 30, 2026
- NVD status
- Awaiting Analysis