CVE-2026-49329

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-01. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
36%
KEV
Not listed

Published

September 1, 2026

Last Modified

September 1, 2026

Advisory Details (2)

Auto-updated Sep 1, 2026
Patch available. Sources: redhat.
redhat

2483248 – (CVE-2026-49329) CVE-2026-49329 openshift/oauth-server: openshift/oauth-server: Quadratic-time DoS via Accept-Language header underscore bypass on unauthenticated login endpoints

https://bugzilla.redhat.com/show_bug.cgi?id=2483248
redhat Patch Available

CVE-2026-49329 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-49329

Vendor Advisories for CVE-2026-49329(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 23× in last 7d / 53× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-14 23:34 UTCGHSA enrichment
  2. 2026-09-14 11:28 UTCGHSA enrichment
  3. 2026-09-13 23:32 UTCEG score recompute
  4. 2026-09-13 23:32 UTCGHSA enrichment
  5. 2026-09-13 16:47 UTCEPSS rescore
  6. 2026-09-13 11:36 UTCGHSA enrichment
  7. 2026-09-12 23:40 UTCEG score recompute
  8. 2026-09-12 23:40 UTCGHSA enrichment
  9. 2026-09-12 11:44 UTCGHSA enrichment
  10. 2026-09-11 23:47 UTCEG score recompute
  11. 2026-09-11 23:47 UTCGHSA enrichment
  12. 2026-09-11 14:53 UTCEPSS rescore
  13. 2026-09-11 11:50 UTCEG score recompute
  14. 2026-09-11 11:50 UTCGHSA enrichment
  15. 2026-09-10 23:54 UTCGHSA enrichment
  16. 2026-09-10 11:36 UTCEG score recompute
  17. 2026-09-10 11:36 UTCGHSA enrichment
  18. 2026-09-10 09:35 UTCEPSS rescore
  19. 2026-09-09 23:37 UTCGHSA enrichment
  20. 2026-09-09 11:18 UTCGHSA enrichment
  21. 2026-09-08 23:22 UTCEG score recompute
  22. 2026-09-08 23:22 UTCGHSA enrichment
  23. 2026-09-08 22:01 UTCEPSS rescore
  24. 2026-09-08 08:40 UTCGHSA enrichment
  25. 2026-09-07 20:38 UTCEG score recompute
Show 28 more
  1. 2026-09-07 20:38 UTCGHSA enrichment
  2. 2026-09-07 16:01 UTCEPSS rescore
  3. 2026-09-07 08:41 UTCGHSA enrichment
  4. 2026-09-06 20:42 UTCEG score recompute
  5. 2026-09-06 20:42 UTCGHSA enrichment
  6. 2026-09-06 13:47 UTCEPSS rescore
  7. 2026-09-06 08:45 UTCGHSA enrichment
  8. 2026-09-05 20:50 UTCEG score recompute
  9. 2026-09-05 20:50 UTCGHSA enrichment
  10. 2026-09-05 08:54 UTCGHSA enrichment
  11. 2026-09-04 20:58 UTCEG score recompute
  12. 2026-09-04 20:57 UTCGHSA enrichment
  13. 2026-09-04 08:56 UTCEG score recompute
  14. 2026-09-04 08:56 UTCGHSA enrichment
  15. 2026-09-04 05:06 UTCEPSS rescore
  16. 2026-09-03 20:56 UTCGHSA enrichment
  17. 2026-09-03 08:59 UTCGHSA enrichment
  18. 2026-09-02 21:02 UTCEG score recompute
  19. 2026-09-02 21:01 UTCGHSA enrichment
  20. 2026-09-02 14:12 UTCEPSS rescore
  21. 2026-09-02 09:04 UTCGHSA enrichment
  22. 2026-09-01 21:08 UTCEG score recompute
  23. 2026-09-01 21:08 UTCGHSA enrichment
  24. 2026-09-01 18:23 UTCEG score recompute
  25. 2026-09-01 17:22 UTCEG score recompute
  26. 2026-09-01 16:19 UTCEG score recompute
  27. 2026-09-01 15:43 UTCEG score recompute
  28. 2026-09-01 15:42 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-49329?
CVE-2026-49329 is a high vulnerability published on 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 '-'…
When was CVE-2026-49329 disclosed?
CVE-2026-49329 was first published in the National Vulnerability Database on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-49329 actively exploited?
CVE-2026-49329 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 63.6% of all scored CVEs.
What is the CVSS score of CVE-2026-49329?
CVE-2026-49329 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-49329?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-49329, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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