---
id: "CVE-2026-12975"
kind: "vulnerability"
aliases: ["CVE-2026-12975", "GHSA-7g64-f2hm-vjxp"]
title: "Apicurio Registry utilities allow SSRF and denial of service through XML parsing"
severity: "high"
cvss: 8.5
epss: 0.00437
exploited: false
status: "open"
category: "package"
products: [{"name": "io.apicurio:apicurio-registry-schema-util-common", "fixed": ["3.3.1"], "affected": ">= 3.3.0, < 3.3.1", "ecosystem": "maven"}, {"name": "io.apicurio:apicurio-registry-schema-util-common", "fixed": ["3.2.6"], "affected": "< 3.2.6", "ecosystem": "maven"}, {"name": "redhat build of apicurio registry", "fixed": [], "affected": ">= 3.0, <= 3.2", "ecosystem": "vendor"}]
ecosystems: ["maven", "vendor"]
tags: ["apicurio", "cwe-611", "java", "maven", "package", "schema-registry"]
not_affected_if: ["auth-required", "xml-uploads-disabled"]
published_at: "2026-06-25T22:17:00+00:00"
first_seen_at: "2026-11-04T17:51:22+00:00"
updated_at: "2026-11-04T17:58:19+00:00"
sources: [{"source": "ghsa", "url": "https://github.com/advisories/GHSA-7g64-f2hm-vjxp", "first_seen_at": "2026-11-04T17:51:22+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-12975", "first_seen_at": "2026-11-04T17:58:19+00:00"}]
---

# Apicurio Registry utilities allow SSRF and denial of service through XML parsing

Apicurio Registry's XML content-type check parses uploaded documents without disabling external entity resolution. An attacker can upload a crafted XML file to make the server fetch an external address (blind SSRF) or exhaust resources through entity expansion.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- maven:io.apicurio:apicurio-registry-schema-util-common affected >= 3.3.0, < 3.3.1 fixed 3.3.1
- maven:io.apicurio:apicurio-registry-schema-util-common affected < 3.2.6 fixed 3.2.6
- vendor:redhat build of apicurio registry affected >= 3.0, <= 3.2 fixed ?

## How to check

- Check the version of `io.apicurio:apicurio-registry-schema-util-common` in your build file or dependency tree against the affected ranges.
- Look for Apicurio Registry deployments and note whether artifact upload is open to unauthenticated users (the advisory says default configuration allows it).

## Fix

- `io.apicurio:apicurio-registry-schema-util-common` 3.3.x: move to `3.3.1`
- `io.apicurio:apicurio-registry-schema-util-common` 3.2.x and earlier: move to `3.2.6`

## Timeline

- 2026-11-04T17:51:22+00:00 ghsa https://github.com/advisories/GHSA-7g64-f2hm-vjxp
- 2026-11-04T17:58:19+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-12975

## Documents

- [advisory] Vendor advisory: access.redhat.com https://access.redhat.com/security/cve/CVE-2026-12975
- [advisory] Vendor advisory: bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2491688
- [advisory] Vendor advisory: security.access.redhat.com https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12975.json
- [fix] Release: github.com https://github.com/Apicurio/apicurio-registry/releases/tag/3.2.6
- [fix] Patch: github.com https://github.com/Apicurio/apicurio-registry/pull/8197
- [fix] Release: github.com https://github.com/Apicurio/apicurio-registry/releases/tag/3.3.1
- [fix] Patch: github.com https://github.com/Apicurio/apicurio-registry/commit/48369d0e9008f7aab16dce5970c1ecbdd55e9aa5
- [fix] Patch: github.com https://github.com/Apicurio/apicurio-registry/commit/a744fcb65991bbf04d4882f888655112afc5b06a

## From the sources

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.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_