CVE-2026-15927

MEDIUMPre-NVD 6.86.8—
EchelonGraph scoreMEDIUM confidence

Score 6.8 from GitHub Security Advisory published 2026-07-21. a secondary CVSS source baseline 6.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
6.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 6.8Exploit: None knownExposed: 0

A fix is available — apply it.

A flaw was found in Red Hat Quay's repository-level mirror configuration feature. The POST and PUT handlers in endpoints/api/mirror.py accept an external_reference parameter without SSRF validation, unlike the organization-level mirror handlers which apply validate_external_registry_url(). A repository administrator can supply a crafted hostname that causes the Quay mirror worker to make requests via Skopeo to internal network services, cloud metadata endpoints, or other resources not intended to be reachable from the Quay application.

CVSS v3
6.8
EG Score
6.8(medium)
EG Risk
31(Track)
EG Risk 31/100SSVC: 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
Severity68% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
42%
KEV
Not listed

Published

July 21, 2026

Last Modified

September 9, 2026

Advisory Details (2)

Auto-updated Jul 21, 2026
Patch available. Sources: redhat.
redhat

2501256 – (CVE-2026-15927) CVE-2026-15927 quay: mirror-registry: SSRF: repo-level mirror accepts external_reference without URL validation

https://bugzilla.redhat.com/show_bug.cgi?id=2501256
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-15927

Vendor Advisories for CVE-2026-15927(6)

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

Patch Availability(5)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatquay/quay-rhel8:17881917552026-09-03redhat
redhatquay/quay-rhel9:17861819812026-08-12redhat
redhatquay/quay-rhel8:17863950652026-08-11redhat
redhatquay/quay-rhel8:17861706352026-08-10redhat
redhatquay/quay-rhel8:17859500042026-08-05redhat

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 27× in last 7d / 114× 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 203 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-15927?
CVE-2026-15927 is a medium vulnerability published on July 21, 2026. A flaw was found in Red Hat Quay's repository-level mirror configuration feature. The POST and PUT handlers in endpoints/api/mirror.py accept an external_reference parameter without SSRF validation, unlike the organization-level mirror handlers which apply validateexternalregistry_url(). A…
When was CVE-2026-15927 disclosed?
CVE-2026-15927 was first published in the National Vulnerability Database on July 21, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-15927 actively exploited?
CVE-2026-15927 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 57.8% of all scored CVEs.
What is the CVSS score of CVE-2026-15927?
CVE-2026-15927 has a CVSS v3 base score of 6.8 (NVD).
How do I remediate CVE-2026-15927?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-15927, 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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