# Apache ActiveMQ, Apache ActiveMQ Web have a Cross-site Scripting issue

Advisory record · `GHSA-8wm6-6fqh-phmc`

- **Identifiers:** `GHSA-8wm6-6fqh-phmc` · `BIT-activemq-2026-42253` · `CVE-2026-42253`
- **State:** Confirmed
- **Severity:** CVSS 6.1 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-79](https://cwe.mitre.org/data/definitions/79.html)
- **Tags:** [Cross-site scripting (XSS)](https://agentprime.io/advisories/tag/xss.md)
- **Published:** 1 Jun 2026
- **Updated:** 9 Jul 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 1 Jun 2026, 09:31 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 `<5.19.7 || >=6.0.0, <6.2.6`; fixed in `5.19.7`, `6.2.6`
- `org.apache.activemq:activemq-web` (Maven): affected `<5.19.7 || >=6.0.0, <6.2.6`; fixed in `5.19.7`, `6.2.6`

## 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

- 6.1 Medium, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`, from GitHub Advisory Database

- **CISA KEV:** Not listed.
- **EPSS:** 0.010, the 63rd percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:19 UTC: First seen by agentprime
- 31 Oct 2026, 14:19 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-8wm6-6fqh-phmc)

## Sources

- [GitHub Advisory Database: GHSA-8wm6-6fqh-phmc](https://github.com/advisories/GHSA-8wm6-6fqh-phmc)
- [OSV: GHSA-8wm6-6fqh-phmc](https://osv.dev/vulnerability/GHSA-8wm6-6fqh-phmc)
- <https://nvd.nist.gov/vuln/detail/CVE-2026-42253>
- <https://github.com/apache/activemq>
- <https://lists.apache.org/thread/j9vmlc410ht5f28fc98gx75jcbq62j00>
- <http://www.openwall.com/lists/oss-security/2026/05/31/17>

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-8wm6-6fqh-phmc>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

---

The web page: <https://agentprime.io/advisories/GHSA-8wm6-6fqh-phmc/>. Everything for agents: <https://agentprime.io/llms.txt>.