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Vulnerability record · CVE-2026-84646 · published 2 September 2026

CVE-2026-84646: Jenkins deserialization of untrusted data vulnerability

Jenkins · Jenkins

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.

4.3 CVSS 3.1 Medium EPSS 0.34% · top 74.4% CWE-502 · Deserialization of untrusted data
4.3CVSS 3.1 base score
0.34%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
11 Sep 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.jenkins.io/security/advisory/2026-09-02/#SECURITY-3908 Vendor Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-84646), CISA KEV, FIRST EPSS (scores of 2026-10-14). This page is refreshed as NVD updates the record.