CVE-2026-12993

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH 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 — 3 sources updated this week
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.5Exploit: NoneExposed: 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(high)
EPSS
16.1%
KEV
Not listed

Published

June 26, 2026

Last Modified

July 6, 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 24× in last 7d / 39× 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.

  1. 2026-07-07 00:57 UTCEG score recompute
  2. 2026-07-07 00:57 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 02:59 UTCEG score recompute
  5. 2026-07-06 02:59 UTCGHSA enrichment
  6. 2026-07-06 02:23 UTCEPSS rescore
  7. 2026-07-05 05:01 UTCEG score recompute
  8. 2026-07-05 05:00 UTCGHSA enrichment
  9. 2026-07-05 02:30 UTCEPSS rescore
  10. 2026-07-05 02:30 UTCEPSS rescore
  11. 2026-07-04 07:00 UTCEG score recompute
  12. 2026-07-04 06:59 UTCGHSA enrichment
  13. 2026-07-04 06:31 UTCEPSS rescore
  14. 2026-07-03 08:56 UTCEG score recompute
  15. 2026-07-03 08:56 UTCGHSA enrichment
  16. 2026-07-02 10:58 UTCEG score recompute
  17. 2026-07-02 10:58 UTCGHSA enrichment
  18. 2026-07-01 15:06 UTCEPSS rescore
  19. 2026-07-01 15:06 UTCEPSS rescore
  20. 2026-07-01 12:42 UTCEG score recompute
  21. 2026-07-01 12:42 UTCGHSA enrichment
  22. 2026-06-30 23:22 UTCEPSS rescore
  23. 2026-06-30 14:44 UTCEG score recompute
  24. 2026-06-30 14:44 UTCGHSA enrichment
  25. 2026-06-29 16:44 UTCEG score recompute
Show 14 more
  1. 2026-06-29 16:44 UTCGHSA enrichment
  2. 2026-06-29 14:06 UTCEPSS rescore
  3. 2026-06-28 18:45 UTCEG score recompute
  4. 2026-06-28 18:45 UTCGHSA enrichment
  5. 2026-06-28 14:07 UTCEPSS rescore
  6. 2026-06-28 04:56 UTCEPSS rescore
  7. 2026-06-28 04:56 UTCEPSS rescore
  8. 2026-06-27 20:46 UTCEG score recompute
  9. 2026-06-27 20:46 UTCGHSA enrichment
  10. 2026-06-27 03:08 UTCEPSS rescore
  11. 2026-06-26 22:47 UTCEG score recompute
  12. 2026-06-26 22:46 UTCGHSA enrichment
  13. 2026-06-26 00:47 UTCEG score recompute
  14. 2026-06-26 00:47 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 July 6, 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 16.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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

Explore the affected products and dependency analysis for CVE-2026-12993

Explore →

Is Your Infrastructure Affected by CVE-2026-12993?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs