VDB

CVE-2026-49329

CVE-2026-49329 PUBLISHED CVSS 7.5 HIGH

Reported by redhat · Published September 1, 2026

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.

Risk Scores

CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Products

VendorProductVersions
Red HatRed Hat OpenShift Container Platform 4.191790611633
Red HatRed Hat OpenShift Container Platform 4.201790702087
Red HatRed Hat OpenShift Container Platform 4.211790707106
Red HatRed Hat OpenShift Container Platform 4.221790713150
Red HatRed Hat OpenShift Container Platform 4
Red HatRed Hat OpenShift Container Platform 4
Red HatRed Hat OpenShift Container Platform 4.211790707106, 1790707106
Red HatRed Hat OpenShift Container Platform 4.201790702087, 1790702087
Red HatRed Hat OpenShift Container Platform 4
Red HatRed Hat OpenShift Container Platform 4.191790611633
Red HatRed Hat OpenShift Container Platform 4.221790713150, 1790713150

Timeline

  • Sep 1, 2026 Coalition ESS Score
  • Sep 1, 2026 CVE Published
  • Sep 2, 2026 EPSS Score
  • Sep 6, 2026 EPSS Score
  • Sep 9, 2026 EPSS Score
  • Sep 12, 2026 EPSS Score
  • Sep 16, 2026 EPSS Score
  • Sep 18, 2026 EPSS Score
  • Sep 21, 2026 EPSS Score
  • Sep 22, 2026 EPSS Score
  • Sep 24, 2026 EPSS Score
  • Sep 26, 2026 EPSS Score

References

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