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
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 6.5Exploit: None knownExposed services: Not assessed

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
6.5MEDIUMmedium confidence
EG Risk
29
EG Risk 29/100

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%
EPSS PROB
0.5%
EPSS %ILE
42nd
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
redhatMentions a patch (unverified)

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 / EcosystemFix (by version range) / 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 7× in last 7d / 31× 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 193 total refreshes for this CVE.

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

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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 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 0.5% probability of exploitation in the next 30 days (42nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-12993?
CVE-2026-12993 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-12993?
A fix for CVE-2026-12993 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-12993 are linked in the Vendor Advisories panel on this page.

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