CVE-2026-12993

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-06-26. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 6.5Exploit: None knownExposed: 0

A fix is available — apply it.

A flaw was found in Apicurio Registry. The DocumentBuilderAccessor correctly blocks external DTD and schema access but does not disable DOCTYPE declarations or enable FEATURE_SECURE_PROCESSING. An attacker with artifact-write permission can upload XML documents with internal entity-expansion payloads (billion-laughs variant) that cause CPU and heap exhaustion, partially mitigated by the JAXP default 64,000 entity-expansion limit.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity65% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
43%
KEV
Not listed

Published

June 26, 2026

Last Modified

August 25, 2026

Advisory Details (2)

Auto-updated Jun 26, 2026
Patch available. Sources: redhat.
redhat

2491692 – (CVE-2026-12993) CVE-2026-12993 Apicurio/apicurio-registry: apicurio-registry: XML entity-expansion denial of service via internal DTD subset

https://bugzilla.redhat.com/show_bug.cgi?id=2491692
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-12993

Vendor Advisories for CVE-2026-12993(2)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatapicurio/apicurio-registry-rhel92026-08-25redhat

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 12× in last 7d / 45× 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 176 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-12993?
CVE-2026-12993 is a medium vulnerability published on June 26, 2026. A flaw was found in Apicurio Registry. The DocumentBuilderAccessor correctly blocks external DTD and schema access but does not disable DOCTYPE declarations or enable FEATURESECUREPROCESSING. An attacker with artifact-write permission can upload XML documents with internal entity-expansion payloads…
When was CVE-2026-12993 disclosed?
CVE-2026-12993 was first published in the National Vulnerability Database on June 26, 2026, with the most recent update on August 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-12993 actively exploited?
CVE-2026-12993 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 56.9% of all scored CVEs.
What is the CVSS score of CVE-2026-12993?
CVE-2026-12993 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-12993?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-12993, 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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