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 — 4 sources updated 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
27%
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 32× in last 7d / 129× 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 217 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

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 73.1% 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.

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