CVE-2026-49332

HIGHPre-NVD 8.58.5—
EchelonGraph scoreMEDIUM confidence

Score 8.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-28. a secondary CVSS source baseline 8.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
8.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.5Exploit: None knownExposed: 0

A fix is available — apply it.

A flaw was found in openshift/oauth-proxy. The proxy sets authenticated identity headers using only dash-variant keys (X-Forwarded-User) but does not strip underscore-variant keys (X_Forwarded_User) from incoming requests. WSGI and PHP frameworks normalize both variants to the same variable, allowing an authenticated low-privilege user to smuggle a forged identity that may override the legitimate authenticated identity in the upstream application.

CVSS v3
8.5
EG Score
8.5(medium)
EG Risk
38(Track)
EG Risk 38/100SSVC: 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
Severity85% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
23%
KEV
Not listed

Published

July 28, 2026

Last Modified

September 8, 2026

Advisory Details (2)

Auto-updated Jul 28, 2026
Patch available. Sources: redhat.
redhat

2483253 – (CVE-2026-49332) CVE-2026-49332 openshift/oauth-proxy: openshift/oauth-proxy: underscore header smuggling enables identity impersonation on WSGI/PHP upstreams

https://bugzilla.redhat.com/show_bug.cgi?id=2483253
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-49332

Vendor Advisories for CVE-2026-49332(12)

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

Patch Availability(11)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatopenshift4/ose-oauth-proxy-rhel9:17875433132026-09-03redhat
redhatopenshift4/ose-oauth-proxy-rhel9:17870541002026-08-26redhat
redhatopenshift4/ose-oauth-proxy:17864587042026-08-20redhat
redhatopenshift4/ose-oauth-proxy:17864774362026-08-20redhat
redhatopenshift4/ose-oauth-proxy:17855498182026-08-12redhat
redhatopenshift4/ose-oauth-proxy-rhel9:17855440392026-08-12redhat
redhatopenshift4/ose-oauth-proxy-rhel9:17855297352026-08-12redhat
redhatopenshift4/ose-oauth-proxy-rhel9:17855217282026-08-12redhat
redhatopenshift4/ose-oauth-proxy-rhel9:17858337422026-08-11redhat
redhatopenshift4/ose-oauth-proxy-rhel9:17858853512026-08-11redhat
redhatopenshift4/ose-oauth-proxy-rhel9:17858513592026-08-11redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 33× in last 7d / 185× 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.

Showing the most recent 100 of 330 total refreshes for this CVE.

  1. 2026-09-19 05:18 UTCEG score recompute
  2. 2026-09-19 05:18 UTCVendor advisory
  3. 2026-09-19 05:18 UTCGHSA enrichment
  4. 2026-09-18 19:28 UTCEPSS rescore
  5. 2026-09-18 17:57 UTCVendor advisory
  6. 2026-09-18 17:57 UTCGHSA enrichment
  7. 2026-09-18 02:09 UTCEG score recompute
  8. 2026-09-18 02:09 UTCVendor advisory
  9. 2026-09-18 02:09 UTCGHSA enrichment
  10. 2026-09-17 01:42 UTCEG score recompute
  11. 2026-09-17 01:42 UTCVendor advisory
  12. 2026-09-17 01:42 UTCGHSA enrichment
  13. 2026-09-16 14:08 UTCEPSS rescore
  14. 2026-09-16 05:54 UTCEG score recompute
  15. 2026-09-16 05:54 UTCVendor advisory
  16. 2026-09-16 05:54 UTCGHSA enrichment
  17. 2026-09-16 05:15 UTCEPSS rescore
  18. 2026-09-15 08:51 UTCEG score recompute
  19. 2026-09-15 08:51 UTCVendor advisory
  20. 2026-09-15 08:51 UTCGHSA enrichment
  21. 2026-09-14 10:53 UTCVendor advisory
  22. 2026-09-14 10:53 UTCGHSA enrichment
  23. 2026-09-14 00:04 UTCEG score recompute
  24. 2026-09-14 00:04 UTCVendor advisory
  25. 2026-09-14 00:04 UTCGHSA enrichment
Show 75 more
  1. 2026-09-13 16:47 UTCEPSS rescore
  2. 2026-09-13 13:16 UTCVendor advisory
  3. 2026-09-13 13:16 UTCGHSA enrichment
  4. 2026-09-13 02:28 UTCVendor advisory
  5. 2026-09-13 02:28 UTCGHSA enrichment
  6. 2026-09-12 15:39 UTCEG score recompute
  7. 2026-09-12 15:39 UTCVendor advisory
  8. 2026-09-12 15:39 UTCGHSA enrichment
  9. 2026-09-12 04:50 UTCVendor advisory
  10. 2026-09-12 04:50 UTCGHSA enrichment
  11. 2026-09-11 17:54 UTCEG score recompute
  12. 2026-09-11 17:54 UTCVendor advisory
  13. 2026-09-11 17:54 UTCGHSA enrichment
  14. 2026-09-11 14:53 UTCEPSS rescore
  15. 2026-09-11 07:05 UTCVendor advisory
  16. 2026-09-11 07:04 UTCGHSA enrichment
  17. 2026-09-10 20:14 UTCEG score recompute
  18. 2026-09-10 20:14 UTCVendor advisory
  19. 2026-09-10 20:14 UTCGHSA enrichment
  20. 2026-09-10 09:35 UTCEPSS rescore
  21. 2026-09-10 07:47 UTCVendor advisory
  22. 2026-09-10 07:47 UTCGHSA enrichment
  23. 2026-09-09 08:05 UTCEG score recompute
  24. 2026-09-09 08:05 UTCVendor advisory
  25. 2026-09-09 08:05 UTCGHSA enrichment
  26. 2026-09-08 22:01 UTCEPSS rescore
  27. 2026-09-08 11:25 UTCVendor advisory
  28. 2026-09-08 11:24 UTCGHSA enrichment
  29. 2026-09-08 10:33 UTCEG score recompute
  30. 2026-09-08 10:33 UTCVendor advisory
  31. 2026-09-08 10:33 UTCGHSA enrichment
  32. 2026-09-08 09:56 UTCEG score recompute
  33. 2026-09-08 09:56 UTCVendor advisory
  34. 2026-09-08 09:56 UTCGHSA enrichment
  35. 2026-09-07 20:56 UTCVendor advisory
  36. 2026-09-07 20:56 UTCGHSA enrichment
  37. 2026-09-06 18:21 UTCEG score recompute
  38. 2026-09-06 18:21 UTCVendor advisory
  39. 2026-09-06 18:21 UTCGHSA enrichment
  40. 2026-09-06 17:24 UTCVendor advisory
  41. 2026-09-06 17:24 UTCGHSA enrichment
  42. 2026-09-06 16:59 UTCEG score recompute
  43. 2026-09-06 16:59 UTCVendor advisory
  44. 2026-09-06 16:59 UTCGHSA enrichment
  45. 2026-09-06 13:47 UTCEPSS rescore
  46. 2026-09-06 10:00 UTCVendor advisory
  47. 2026-09-06 10:00 UTCGHSA enrichment
  48. 2026-09-05 23:11 UTCEG score recompute
  49. 2026-09-05 23:11 UTCVendor advisory
  50. 2026-09-05 23:11 UTCGHSA enrichment
  51. 2026-09-05 12:22 UTCEG score recompute
  52. 2026-09-05 12:22 UTCVendor advisory
  53. 2026-09-05 12:22 UTCGHSA enrichment
  54. 2026-09-05 12:08 UTCEG score recompute
  55. 2026-09-05 12:08 UTCVendor advisory
  56. 2026-09-05 12:08 UTCGHSA enrichment
  57. 2026-09-05 05:33 UTCEG score recompute
  58. 2026-09-05 05:33 UTCVendor advisory
  59. 2026-09-05 05:33 UTCGHSA enrichment
  60. 2026-09-04 12:04 UTCEG score recompute
  61. 2026-09-04 12:04 UTCVendor advisory
  62. 2026-09-04 12:04 UTCGHSA enrichment
  63. 2026-09-04 05:06 UTCEPSS rescore
  64. 2026-09-03 15:31 UTCEG score recompute
  65. 2026-09-03 15:31 UTCVendor advisory
  66. 2026-09-03 15:31 UTCGHSA enrichment
  67. 2026-09-03 14:35 UTCEG score recompute
  68. 2026-09-03 14:35 UTCVendor advisory
  69. 2026-09-03 14:35 UTCGHSA enrichment
  70. 2026-09-02 14:12 UTCEPSS rescore
  71. 2026-09-01 22:54 UTCEG score recompute
  72. 2026-09-01 22:54 UTCVendor advisory
  73. 2026-09-01 22:54 UTCGHSA enrichment
  74. 2026-09-01 13:54 UTCEPSS rescore
  75. 2026-09-01 04:40 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-49332?
CVE-2026-49332 is a high vulnerability published on July 28, 2026. A flaw was found in openshift/oauth-proxy. The proxy sets authenticated identity headers using only dash-variant keys (X-Forwarded-User) but does not strip underscore-variant keys (XForwardedUser) from incoming requests. WSGI and PHP frameworks normalize both variants to the same variable, allowing…
When was CVE-2026-49332 disclosed?
CVE-2026-49332 was first published in the National Vulnerability Database on July 28, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-49332 actively exploited?
CVE-2026-49332 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 77.0% of all scored CVEs.
What is the CVSS score of CVE-2026-49332?
CVE-2026-49332 has a CVSS v3 base score of 8.5 (NVD).
How do I remediate CVE-2026-49332?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-49332, 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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