What is CVE-2026-53435?

CVE-2026-53435 is a high-severity vulnerability in Jenkins, classified under Deserialization of Untrusted Data. CVSS score: 8.8/10. Published 2026-06-10.

How severe is CVE-2026-53435?

High severity. CVSS v3 base score is 8.8 out of 10.

Deserialization in Jenkins

CVE-2026-53435

In Jenkins 2.567 and earlier, LTS 2.555.2 and earlier, it is possible for attackers to have Jenkins deserialize arbitrary types defined in Jenkins core or plugins from an attacker-controlled `config.xml` submission in a way that allows the…

Vulnerability class: Insecure Deserialization

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Jenkins

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

jenkinsci-cert@googlegroups.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-53435?: CVE-2026-53435 is a high-severity vulnerability in Jenkins, classified under Deserialization of Untrusted Data. CVSS score: 8.8/10. Published 2026-06-10.
How severe is CVE-2026-53435?: High severity. CVSS v3 base score is 8.8 out of 10.