Vulnerability · Published May 27, 2026 · Assigned by jenkins

CVE-2026-48921

High 7.5

In plain English

A high-severity security flaw in Jenkins Pipeline: Groovy Libraries Plugin from Jenkins Project. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.3%top 78.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Maven	io.jenkins.plugins:pipeline-groovy-lib	798.v5cc688825312	GHSA-qjq3-wqj5-g37q

Affected products (as reported)

Vendor	Product	Versions
Jenkins Project	Jenkins Pipeline: Groovy Libraries Plugin	0 – through 797.v90ea_a_9b_e45a_0

Weakness: CWE-59 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Jenkins Security Advisory 2026-05-27 vendor-advisory