CVE-2026-74240

MEDIUMNVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

Score 5.4 from GitHub Security Advisory published 2026-08-15. NVD baseline CVSS 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 5.4Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A flaw was found in Red Hat Quay's JWT (JSON Web Token) validation for federated robot accounts and single sign-on (SSO) authentication. Multiple issues related to audience verification and the enforcement of azp and sub claims were identified. These flaws could allow an attacker with a validly-signed token from the same identity provider to bypass configured security restrictions. This bypass could lead to unauthorized access by circumventing intended audience, subject, or authorized-client limitations.

CVSS v3
5.4
EG Score
5.4MEDIUMmedium confidence
EG Risk
24
EG Risk 24/100CISA 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
Severity54% × 45%
Exploitation0% × 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
0.3%
EPSS %ILE
19th
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

August 14, 2026

Last Modified

August 20, 2026

Advisory Details (2)

Auto-updated Aug 14, 2026
Patch available. Sources: redhat.
redhat

2516139 – (CVE-2026-74240) CVE-2026-74240 quay: JWT claim validation bypasses in Quay federated robot and SSO authentication

https://bugzilla.redhat.com/show_bug.cgi?id=2516139
redhat Patch Available

CVE-2026-74240 - 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-2026-74240

Vendor Advisories for CVE-2026-74240(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 11× in last 7d / 69× 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 135 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-74240?
CVE-2026-74240 is a medium vulnerability published on August 14, 2026. A flaw was found in Red Hat Quay's JWT (JSON Web Token) validation for federated robot accounts and single sign-on (SSO) authentication. Multiple issues related to audience verification and the enforcement of azp and sub claims were identified. These flaws could allow an attacker with a…
When was CVE-2026-74240 disclosed?
CVE-2026-74240 was first published on August 14, 2026, with the most recent update on August 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-74240 actively exploited?
CVE-2026-74240 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (19th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-74240?
CVE-2026-74240 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-74240?
A fix for CVE-2026-74240 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-74240 are linked in the Vendor Advisories panel on this page.

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