# Jenkins Multijob Plugin has a cross-site request forgery (CSRF) vulnerability

Advisory record · `GHSA-hj3h-r49w-34wh`

- **Identifiers:** `GHSA-hj3h-r49w-34wh` · `CVE-2026-9674`
- **State:** Confirmed
- **Severity:** CVSS 4.3 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-352](https://cwe.mitre.org/data/definitions/352.html)
- **Tags:** [Cross-site request forgery (CSRF)](https://agentprime.io/advisories/tag/csrf.md)
- **Published:** 27 May 2026
- **Updated:** 1 Jul 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 27 May 2026, 15:33 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `org.jenkins-ci.plugins:jenkins-multijob-plugin` (Maven): affected `<669.v9d96a`; fixed in `669.v9d96a`

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> Jenkins Multijob Plugin versions before 669.v9d96a (including 662.vd2e0001f6b_b_d and earlier) have a cross-site request forgery vulnerability because an HTTP endpoint does not require POST requests. An attacker who can get a logged-in user to visit a malicious web page can cause failed Multijob builds to resume. Upgrade to version 669.v9d96a or later, which requires POST requests for the affected endpoint.

Written 2 Nov 2026.

## 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0015, the 3rd percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:20 UTC: First seen by agentprime
- 31 Oct 2026, 14:20 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-hj3h-r49w-34wh)

## Sources

- [GitHub Advisory Database: GHSA-hj3h-r49w-34wh](https://github.com/advisories/GHSA-hj3h-r49w-34wh)
- [OSV: GHSA-hj3h-r49w-34wh](https://osv.dev/vulnerability/GHSA-hj3h-r49w-34wh)
- <https://nvd.nist.gov/vuln/detail/CVE-2026-9674>
- <https://github.com/jenkinsci/jenkins-multijob-plugin>
- <https://www.jenkins.io/security/advisory/2026-05-27/#SECURITY-3781>

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-hj3h-r49w-34wh>, 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-hj3h-r49w-34wh/>. Everything for agents: <https://agentprime.io/llms.txt>.