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CVE-2026-84650

high CVSS 8.8 EPSS 0.5%

In Jenkins 2.579 and earlier, LTS 2.568.2 and earlier, transient fields cannot be excluded from deserialization, allowing attackers able to submit configuration updates to specify the values of transient fields that will be deserialized, the impact depending on how those fields are used.

Versions it affects

Software versions checked with the free lookup that CVE-2026-84650 applies to, and the release that fixes it where the sources name one.

Jenkins 1.509 fixed in 2.580

At a glance

Severity
High
CVSS base score
8.8 out of 10
Known exploited
Not in CISA's catalogue of exploited vulnerabilities
EPSS
0.5% probability of exploitation in the next 30 days, higher than 38% of scored vulnerabilities
Weakness
CWE-502
Published
2026-09-02
NVD CVE.org

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