CVE-2026-12993
Apicurio/apicurio-registry: apicurio-registry: xml entity-expansion denial of service via internal dtd subset
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Apicurio/apicurio-registry: apicurio-registry: xml entity-expansion denial of service via internal dtd subset
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.
- Record
CVE-2026-12993- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-776
- Updated
- 2026-11-06
EUVDEUVD-2026-39593
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.
- Record
EUVD-2026-39593- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-06
GitHub AdvisoriesGHSA-748j-wm96-4wh5
Apicurio Registry is vulnerable to denial of service through XML entity expansion
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.
- Record
GHSA-748j-wm96-4wh5- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-776
- Updated
- 2026-11-04
NVD
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.
- Record
CVE-2026-12993- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-776
- Updated
- 2026-11-02
OSVGHSA-748j-wm96-4wh5
Apicurio Registry is vulnerable to denial of service through XML entity expansion
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.
- Record
GHSA-748j-wm96-4wh5- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-776
- Updated
- 2026-11-04
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
io.apicurio:apicurio-registry-schema-util-xmlMaven |
3.3.0 up to 3.3.1 | 3.3.1 |
io.apicurio:apicurio-registry-schema-util-xmlMaven |
before 3.2.6 | 3.2.6 |
io.apicurio:apicurio-registry-schema-util-xmlMaven |
before 3.2.6, plus listed versions 2.1.4.Final2.1.5.Final2.2.0.Final2.2.1.Final2.2.2.Final Show 45 moreShow less2.2.3.Final2.2.4.Final2.2.5.Final2.3.0.Final2.3.1.Final2.4.0.Final2.4.1.Final2.4.10.Final2.4.11.Final2.4.12.Final2.4.13.Final2.4.14.Final2.4.2.Final2.4.3.Final2.4.4.Final2.4.5.Final2.4.6.Final2.4.7.Final2.4.8.Final2.4.9.Final2.5.0.Final2.5.1.Final2.5.10.Final2.5.11.Final2.5.2.Final2.5.3.Final2.5.5.Final2.5.6.Final2.5.7.Final2.5.8.Final2.5.9.Final2.6.0.Final2.6.1.Final2.6.11.Final2.6.12.Final2.6.13.Final2.6.2.Final2.6.3.Final2.6.4.Final2.6.5.Final2.6.6.Final2.6.7.Final2.6.8.Final2.6.9.Final3.0.0 |
3.2.6 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, references | OSV | |
| affected, facts, references | GitHub Advisories | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-12993 is a medium vulnerability (CVSS 6.5) in Red Hat Build Of Apicurio Registry 3.3.1, published June 25, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.52%, the 44th percentile. Fixed in io.apicurio:apicurio-registry-schema-util-xml 3.3.1.
References
access.redhat.com/errata/RHSA-2026:59360
bugzilla.redhat.com/show_bug.cgi?id=2491692
nvd.nist.gov/vuln/detail/CVE-2026-12993
github.com/Apicurio/apicurio-registry/issues/8189
Show 6 moreShow less
Left out here: 34 versions. The JSON record has them.