CVE-2026-12993CWE-776

CVE-2026-12993

Medium · published June 26, 2026

CVSS v3.1
6.5
EPSS
1%
Percentile
43.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00519 · 43.3th percentile
Weakness
CWE-776 · Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')
Published
2026-06-26T04:16Z
Affected products (1)
ProductVersionsFixed in
redhat/build_of_apicurio_registry≥ 3.0, ≤ 3.2—
References (3)
https://access.redhat.com/errata/RHSA-2026:59360 · [email protected]https://access.redhat.com/security/cve/CVE-2026-12993 · [email protected]https://bugzilla.redhat.com/show_bug.cgi?id=2491692 · [email protected]
EPSS history
Timeline
  • 25 JUN 23:23Z
    Apicurio/apicurio-registry: apicurio-registry: xml entity-expansion denial of service via internal dtd subset
    cvelistv5