How severe is CVE-2026-12993?

CVE-2026-12993 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-12993 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-12993?

CVE-2026-12993 affects Redhat Build Of Apicurio Registry. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-12993?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-12993 have an EU (EUVD) identifier?

Yes. CVE-2026-12993 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39593.

When was CVE-2026-12993 published?

CVE-2026-12993 was published on 2026-06-26 and last updated on 2026-07-06.

CVE-2026-12993

CVE-2026-12993 is a medium-severity vulnerability in Redhat Build Of Apicurio Registry with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-776.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (15th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-39593
Weakness: CWE-776
Affected product: Redhat Build Of Apicurio Registry
Published: 2026-06-26
Last modified: 2026-07-06

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.

Frequently asked questions

What is CVE-2026-12993?: 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.
How severe is CVE-2026-12993?: CVE-2026-12993 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-12993 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-12993?: CVE-2026-12993 affects Redhat Build Of Apicurio Registry. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-12993?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-12993 have an EU (EUVD) identifier?: Yes. CVE-2026-12993 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39593.
When was CVE-2026-12993 published?: CVE-2026-12993 was published on 2026-06-26 and last updated on 2026-07-06.

References

Affected products (1)

cpe:2.3:a:redhat:build_of_apicurio_registry:*:*:*:*:*:*:*:*

More vulnerabilities in Redhat Build Of Apicurio Registry

CVE-2026-12975 — High (CVSS 8.5): A flaw was found in Apicurio Registry. The ContentTypeUtil.isParsableXml() method creates a SAXParserFactory without…
CVE-2026-12992 — High (CVSS 7.4): A flaw was found in Apicurio Registry. The WSDLReaderAccessor creates a wsdl4j WSDLReader without disabling the…

All CVEs affecting Redhat Build Of Apicurio Registry →

Other CWE-776 vulnerabilities

CVE-2019-19144 — Critical (CVSS 9.8): XML External Entity Injection vulnerability in Quantum DXi6702 2.3.0.3 (11449-53631 Build304) devices via…
CVE-2022-23640 — Critical (CVSS 9.8): Excel-Streaming-Reader is an easy-to-use implementation of a streaming Excel reader using Apache POI. Prior to…
CVE-2014-2228 — Critical (CVSS 9.8): The XStream extension in HP Fortify SCA before 2.2 RC3 allows remote attackers to execute arbitrary code via unsafe…
CVE-2013-4335 — Critical (CVSS 9.8): opOpenSocialPlugin 0.8.2.1, > 0.9.9.2, 0.9.13, 1.2.6: Multiple XML External Entity Injection Vulnerabilities
CVE-2021-23926 — Critical (CVSS 9.1): The XML parsers used by XMLBeans up to version 2.6.0 did not set the properties needed to protect the user from…
CVE-2020-24590 — Critical (CVSS 9.1): The Management Console in WSO2 API Manager through 3.1.0 and API Microgateway 2.2.0 allows XML Entity Expansion attacks.

Browse all CWE-776 vulnerabilities →