# Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Client, Apache ActiveMQ Broker have Memory Allocation with Excessive Size Value vulnerability

Advisory record · `GHSA-f77w-px59-cqf5`

- **Identifiers:** `GHSA-f77w-px59-cqf5` · `BIT-activemq-2026-53917` · `CVE-2026-53917`
- **State:** Confirmed
- **Severity:** CVSS 7.5 High
- **Critical:** No
- **Weakness (CWE):** [CWE-789](https://cwe.mitre.org/data/definitions/789.html)
- **Tags:** [Denial of service](https://agentprime.io/advisories/tag/dos.md)
- **Published:** 30 Jun 2026
- **Updated:** 4 Nov 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 30 Jun 2026, 12:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `org.apache.activemq:apache-activemq` (Maven): affected `<5.19.8 || >=6.0.0, <6.2.7`; fixed in `5.19.8`, `6.2.7`
- `org.apache.activemq:activemq-all` (Maven): affected `<5.19.8 || >=6.0.0, <6.2.7`; fixed in `5.19.8`, `6.2.7`
- `org.apache.activemq:activemq-client` (Maven): affected `<5.19.8 || >=6.0.0, <6.2.7`; fixed in `5.19.8`, `6.2.7`
- `org.apache.activemq:activemq-broker` (Maven): affected `<5.19.8 || >=6.0.0, <6.2.7`; fixed in `5.19.8`, `6.2.7`

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 7.5 High, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`, from GitHub Advisory Database

- **CISA KEV:** Not listed.
- **EPSS:** 0.0074, the 54th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 30 Jun 2026, 12:31 UTC: [Confirmed by GitHub Advisory Database](https://github.com/advisories/GHSA-f77w-px59-cqf5)
- 4 Nov 2026, 16:15 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-f77w-px59-cqf5)

## Sources

- [GitHub Advisory Database: GHSA-f77w-px59-cqf5](https://github.com/advisories/GHSA-f77w-px59-cqf5)
- [OSV: GHSA-f77w-px59-cqf5](https://osv.dev/vulnerability/GHSA-f77w-px59-cqf5)
- <https://nvd.nist.gov/vuln/detail/CVE-2026-53917>
- <https://github.com/apache/activemq/pull/2136>
- <https://github.com/apache/activemq/commit/78bb8dcdc32e80c8b8813b57f89147572d16a2b9>
- <https://github.com/apache/activemq/commit/b20e61c7ef736a04ad07a934ea8de628550c6cf2>
- <https://github.com/apache/activemq/commit/ecfd1336fa3f3f6116a78f0ab71d1b2f90bc717f>
- <https://github.com/apache/activemq>
- <https://github.com/apache/activemq/releases/tag/activemq-5.19.8>
- <https://github.com/apache/activemq/releases/tag/activemq-6.2.7>
- <https://lists.apache.org/thread/grrd1mwgkgblqjbwkkq6dvmdxd9ov2dx>
- <http://www.openwall.com/lists/oss-security/2026/06/29/14>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-f77w-px59-cqf5>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-f77w-px59-cqf5/>. Everything for agents: <https://agentprime.io/llms.txt>.