Jenkins 2.587 and earlier, LTS 2.580.1 and earlier does not apply its deserialization filter to classes referenced by the `resolves-to` attribute during XStream deserialization.
https://www.jenkins.io/security/advisory/2026-10-28/#SECURITY-4125
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-112177
Source: Mitre, NVD
Published: 2026-10-28
Updated: 2026-10-29
Base Score: 9
Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C
Severity: High
Base Score: 8.8
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.00191