# CVE-2026-12993

## Summary

- **CVE ID:** CVE-2026-12993
- **Severity:** MEDIUM
- **CVSS Score:** 6.5 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-776
- **Published:** Jun 25, 2026
- **Last Modified:** Aug 25, 2026

## Description

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.

## Affected Products

No affected products listed.

## References

- [CNA](https://access.redhat.com/security/cve/CVE-2026-12993)
- [CNA](https://bugzilla.redhat.com/show_bug.cgi?id=2491692)
- [CNA](https://access.redhat.com/errata/RHSA-2026:59360)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.52%
- **EPSS Percentile:** 42.5

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._