CVE-2026-12993

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-06-26. the CNA's CVSS baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:redhat, epss, ghsa
Trending — 3 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: 0%CVSS: 6.5Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
35%
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(1)

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

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 16× in last 7d / 82× 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 144 total refreshes for this CVE.

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

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 0% probability of exploitation in the next 30 days, which ranks it in the top 64.7% 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.

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