CVE-2026-117612: Jenkins 2.587 and earlier, LTS 2.580.1 and earlier does not apply its deserialization filter to classes refere

Q: How do I fix CVE-2026-117612?

jenkins: upgrade to 2.580.2, 2.588. Exact commands for each OS are on this page.

Q: Is CVE-2026-117612 being exploited?

CVE-2026-117612 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-2026-117612 affect?

CVE-2026-117612 affects jenkins. Severity is high (CVSS 8.8). Jenkins 2.587 and earlier, LTS 2.580.1 and earlier does not apply its deserialization filter to classes referenced by the `resolves-to` attribute during XStream deserialization.

Routine

HIGH 8.8UPGRADE

CVE-2026-117612 is a high-severity flaw (CVSS 8.8) affecting jenkins. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Jenkins 2.587 and earlier, LTS 2.580.1 and earlier does not apply its deserialization filter to classes referenced by the `resolves-to` attribute during XStream deserialization.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 91%)
CISA exploited list	No
Weakness	CWE-502
Published	2026-10-28
Last modified	2026-11-02

Publisher (CNA): Jenkins Project · Vendor: jenkins

Last updated 2026-11-02 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-28 17:18 UTCPublished CVE record published
2026-11-02 15:27 UTCUpdated Record last modified

jenkins jenkins UPGRADE

Affected: < 2.580.2 · < 2.588

Fixed in: 2.580.2, 2.588

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 2.580.2 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade jenkins

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-2026-117612?

jenkins: upgrade to 2.580.2, 2.588. Exact commands for each OS are on this page.

Is CVE-2026-117612 being exploited?

CVE-2026-117612 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-2026-117612 affect?

CVE-2026-117612 affects jenkins. Severity is high (CVSS 8.8). Jenkins 2.587 and earlier, LTS 2.580.1 and earlier does not apply its deserialization filter to classes referenced by the `resolves-to` attribute during XStream deserialization.

How urgent is CVE-2026-117612?

Priority 33/100. High severity

Software pages

Jenkins vulnerabilities

Related CVEs

CVE-2026-117613 MEDIUM 5.4 UPGRADE Jenkins 2.587 and earlier, LTS 2.580.1 and earlier does not restrict item types in collections after deseriali
CVE-2026-117614 HIGH 7.2 UPGRADE Jenkins 2.587 and earlier, LTS 2.580.1 and earlier converts the launch commands in older agent configurations
CVE-2026-117615 MEDIUM 6.5 UPGRADE Jenkins 2.587 and earlier, LTS 2.580.1 and earlier follows symbolic links when copying the directory of an ite
CVE-2026-117616 HIGH 8.8 UPGRADE Jenkins 2.587 and earlier, LTS 2.580.1 and earlier provides an HTTP endpoint that loads agents by name without
CVE-2026-117617 HIGH 8.1 UPGRADE Jenkins 2.587 and earlier, LTS 2.580.1 and earlier checks for symbolic links in the path of an extracted file

References

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