# Jenkins LDAP Plugin follows LDAP referrals

Advisory record · `GHSA-fmjp-mw89-c6h6`

- **Identifiers:** `GHSA-fmjp-mw89-c6h6` · `CVE-2026-48916`
- **State:** Confirmed
- **Severity:** CVSS 6.6 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-918](https://cwe.mitre.org/data/definitions/918.html)
- **Tags:** [Server-side request forgery (SSRF)](https://agentprime.io/advisories/tag/ssrf.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:ldap` (Maven): affected `<807.809.vd3a`; fixed in `807.809.vd3a`

## Machine-written summary

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

> Jenkins LDAP Plugin 807.v7d7de30930cf and earlier follows LDAP referrals, and the affected package is org.jenkins-ci.plugins:ldap before 807.809.vd3a. An attacker who controls the configured LDAP server, or can perform a man-in-the-middle attack, can use a referral to an RMI URL to make Jenkins deserialize attacker-controlled data, which can lead to code execution on the Jenkins controller if suitable gadgets are on the classpath. Upgrade to version 807.809.vd3a or later, which no longer follows LDAP referrals.

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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0027, the 20th 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-fmjp-mw89-c6h6)

## Sources

- [GitHub Advisory Database: GHSA-fmjp-mw89-c6h6](https://github.com/advisories/GHSA-fmjp-mw89-c6h6)
- [OSV: GHSA-fmjp-mw89-c6h6](https://osv.dev/vulnerability/GHSA-fmjp-mw89-c6h6)
- <https://nvd.nist.gov/vuln/detail/CVE-2026-48916>
- <https://github.com/jenkinsci/ldap-plugin>
- <https://www.jenkins.io/security/advisory/2026-05-27/#SECURITY-3654>

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-fmjp-mw89-c6h6>, 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-fmjp-mw89-c6h6/>. Everything for agents: <https://agentprime.io/llms.txt>.