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
EPSS: 0.190 (97.0th percentile) — read the EPSS interpretation.
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
- Jenkins Project — versions 2.568, 2.555.3
Weakness classification (CWE)
Public proof-of-concept exploits
References
- jenkinsci-cert@googlegroups.com (vendor-advisory, Vendor Advisory)
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
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.
- Is CVE-2026-53435 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.