7.5
High
CVE-2026-49329 A flaw was found in openshift/oauth-server
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat OpenShift Container Platform 4 | Versions not published | |
| Red Hat OpenShift Container Platform 4.21 1790707106 | earliest → < 1790707106 | 1790707106 |
| Red Hat OpenShift Container Platform 4.22 1790713150 | earliest → < 1790713150 | 1790713150 |
| Red Hat OpenShift Container Platform 4.20 1790702087 | earliest → < 1790702087 | 1790702087 |
| Red Hat OpenShift Container Platform 4.19 1790611633 | earliest → < 1790611633 | 1790611633 |
| Red Hat OpenShift Container Platform 4.18 1790882323 | earliest → < 1790882323 | 1790882323 |
| Red Hat OpenShift Container Platform 4.14 1791839120 | earliest → < 1791839120 | 1791839120 |
| Red Hat OpenShift Container Platform 4.15 1791598539 | earliest → < 1791598539 | 1791598539 |
| Red Hat OpenShift Container Platform 4.16 1792883889 | earliest → < 1792883889 | 1792883889 |
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| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat OpenShift Container Platform 5 | Versions not published |
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