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CVE-2026-84646

medium CVSS 4.3 EPSS 0.3%

In Jenkins 2.579 and earlier, LTS 2.568.2 and earlier, user objects can appear as nested field values in other deserialized XML objects, allowing attackers with Overall/Read permission to create user objects by submitting crafted XML.

Versions it affects

Software versions checked with the free lookup that CVE-2026-84646 applies to, and the release that fixes it where the sources name one.

Jenkins 1.509 fixed in 2.580

At a glance

Severity
Medium
CVSS base score
4.3 out of 10
Known exploited
Not in CISA's catalogue of exploited vulnerabilities
EPSS
0.3% probability of exploitation in the next 30 days, higher than 25% of scored vulnerabilities
Weakness
CWE-502
Published
2026-09-02
NVD CVE.org

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