XML Entity Expansion Vulnerability in Apicurio Registry
CVE-2026-12993

6.5MEDIUM

Key Information:

Vendor

Red Hat
Status
Red Hat Build Of Apicurio Registry 3
Vendor
CVE Published:
25 June 2026

What is CVE-2026-12993?

A vulnerability in Apicurio Registry allows an attacker with artifact-write permissions to upload specially crafted XML documents that exploit internal entity expansion, potentially leading to CPU and heap exhaustion. While the DocumentBuilderAccessor has safeguards against external DTD and schema access, it fails to fully mitigate risks associated with DOCTYPE declarations and does not enable FEATURE_SECURE_PROCESSING. This can be exacerbated when the attacker sends payloads based on the billion-laughs attack method, leading to significant resource consumption on the server.

References

https://access.redhat.com/security/cve/CVE-2026-12993
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2491692
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.