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: 0.5%CVSS: 8.5Exploit: None knownExposed services: Not assessed

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
8.5HIGHmedium confidence
EG Risk
38
EG Risk 38/100CISA SSVC

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%
Exploitation1% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
42nd
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

July 28, 2026

Last Modified

September 21, 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 / EcosystemFix (by version range) / 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 19× in last 7d / 124× 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 379 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

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 on July 28, 2026, with the most recent update on September 21, 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 0.5% probability of exploitation in the next 30 days (42nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-49332?
CVE-2026-49332 has a CVSS base score of 8.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-49332?
A fix for CVE-2026-49332 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-49332 are linked in the Vendor Advisories panel on this page.

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