CVE-2026-48921: Jenkins Pipeline: Groovy Libraries Plugin 797.v90ea_a_9b_e45a_0 and earlier does not prohibit symbolic links i

Q: How do I fix CVE-2026-48921?

pipeline\: upgrade to 798.v5cc688825312. Exact commands for each OS are on this page.

Q: Is CVE-2026-48921 being exploited?

CVE-2026-48921 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-48921 affect?

CVE-2026-48921 affects pipeline\. Severity is high (CVSS 7.5). 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

Routine

HIGH 7.5UPGRADE

CVE-2026-48921 is a high-severity flaw (CVSS 7.5) affecting pipeline\. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 79%)
CISA exploited list	No
Weakness	CWE-59
Published	2026-05-27
Last modified	2026-10-14

Publisher (CNA): Jenkins Project · Vendor: jenkins

Last updated 2026-10-14 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-27 15:16 UTCPublished CVE record published
2026-10-14 20:10 UTCUpdated Record last modified

jenkins pipeline\ UPGRADE

Affected: < 798.v5cc688825312

Fixed in: 798.v5cc688825312

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy pipeline || rpm -q pipeline || pipeline --version

2. UPGRADE to 798.v5cc688825312 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade pipeline

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pipeline

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-48921?

pipeline\: upgrade to 798.v5cc688825312. Exact commands for each OS are on this page.

Is CVE-2026-48921 being exploited?

CVE-2026-48921 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-48921 affect?

CVE-2026-48921 affects pipeline\. Severity is high (CVSS 7.5). 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

How urgent is CVE-2026-48921?

Priority 32/100. High severity

Software pages

Jenkins vulnerabilities

Related CVEs

CVE-2026-57284 MEDIUM 4.3 UPGRADE Jenkins Pipeline: Groovy Plugin 4331.v9d06ed4658ff and earlier does not restrict the types that can be instant
CVE-2026-57283 MEDIUM 4.3 UPGRADE A cross-site request forgery (CSRF) vulnerability in Jenkins Pipeline: Groovy Plugin 4331.v9d06ed4658ff and ea

References

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