Skip to content
Fencer Vulns
high 8.5

CVE-2026-12975 json

Apicurio/apicurio-registry: apicurio-registry: unhardened saxparser in content-type detection leads to blind xxe / ssrf / billion-laughs dos

published 2026-06-25 4 mo ago modified 2026-11-04 4 d ago also GHSA-7g64-f2hm-vjxp , EUVD-2026-39574

cvss
8.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 38%
public exploits
0
none known

Summary

A flaw was found in Apicurio Registry. The ContentTypeUtil.isParsableXml() method creates a SAXParserFactory without enabling secure processing features or disabling external entity resolution. An attacker with artifact-write permission (or unauthenticated when the registry runs with default configuration) can upload a crafted XML document to trigger blind server-side request forgery (SSRF) via external DTD/entity fetch, or cause denial of service via entity expansion.

Patch / fix

  • maven io.apicurio:apicurio-registry-schema-util-common 3.2.6, 3.3.1
  • Red Hat Red Hat build of Apicurio Registry 3.3.1 registry-rhel8, registry-rhel9

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-12975 updated cvss 8.5

Apicurio/apicurio-registry: apicurio-registry: Unhardened SAXParser in content-type detection leads to blind XXE / SSRF / billion-laughs DoS

  • Red Hat build of Apicurio Registry 3.3.1
    fixed: vendor fix RHSA-2026:59360

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
4 mo ago

Exploit prediction

0.44% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:H
CISA ADP 3.1 8.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:H
GitHub 3.1 8.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:H

Affected packages

ecosystem package affected fixed in
maven io.apicurio:apicurio-registry-schema-util-common
>=3.3.0, <3.3.1
<3.2.6
3.3.1
3.2.6

Affected products

  • Red Hat Red Hat build of Apicurio Registry 3.3.1

Classification

Weakness
  • CWE-611 Improper Restriction of XML External Entity Reference

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.