CVE-2026-18255

HIGHPre-NVD 7.27.2—
EchelonGraph scoreMEDIUM confidence

Score 7.2 from GitHub Security Advisory (severity: HIGH) published 2026-07-29. a secondary CVSS source baseline 7.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — Patch released this week
7.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.2Exploit: None knownExposed: 0

A fix is available — apply it.

A flaw was found in Quay. A user configured in GLOBAL_READONLY_SUPER_USERS is able to view robot account tokens for repositories they are not a member of, allowing an attacker with read-only superuser privileges to impersonate any robot account.

CVSS v3
7.2
EG Score
7.2(medium)
EG Risk
33(Track)
EG Risk 33/100SSVC: 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
Severity72% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
26%
KEV
Not listed

Published

July 29, 2026

Last Modified

September 10, 2026

Advisory Details (2)

Auto-updated Jul 29, 2026
Patch available. Sources: redhat.
redhat

2508454 – (CVE-2026-18255) CVE-2026-18255 quay: quay: Global read-only superuser can view robot account tokens

https://bugzilla.redhat.com/show_bug.cgi?id=2508454
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-18255

Vendor Advisories for CVE-2026-18255(5)

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

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatquay/quay-rhel8:17885943762026-09-10redhat
redhatquay/quay-rhel8:17885618412026-09-09redhat
redhatquay/quay-rhel8:17885955742026-09-08redhat
redhatquay/quay-rhel8:17881917552026-09-03redhat

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 42× 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 200 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-18255?
CVE-2026-18255 is a high vulnerability published on July 29, 2026. A flaw was found in Quay. A user configured in GLOBALREADONLYSUPER_USERS is able to view robot account tokens for repositories they are not a member of, allowing an attacker with read-only superuser privileges to impersonate any robot account.
When was CVE-2026-18255 disclosed?
CVE-2026-18255 was first published in the National Vulnerability Database on July 29, 2026, with the most recent update on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18255 actively exploited?
CVE-2026-18255 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 73.5% of all scored CVEs.
What is the CVSS score of CVE-2026-18255?
CVE-2026-18255 has a CVSS v3 base score of 7.2 (NVD).
How do I remediate CVE-2026-18255?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-18255, 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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