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Fencer Vulns
high 8.8

CVE-2026-53435 in the critical feed json

Jenkins arbitrary type deserialization from attacker-controlled config.xml allows remote code execution and user impersonation

published 2026-06-10 4 mo ago modified 2026-10-26 13 d ago also BIT-jenkins-2026-53435 , EUVD-2026-36019 , GHSA-g2xq-2v27-4rh3

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
51.2%
EPSS 51.2% chance of exploitation in 30 days, percentile 98%
public exploits
0
none known

Summary

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 them to handle HTTP requests afterwards. This can be used to impersonate any user and send HTTP requests on their behalf, up to and including use of the Script Console to run arbitrary code, or to read arbitrary files from the Jenkins controller.

Patch / fix

  • maven org.jenkins-ci.main:jenkins-core 2.555.3, 2.568
  • bitnami jenkins 2.555.3, 2.568.0
  • Jenkins Project Jenkins 2.568
  • Red Hat OpenShift Developer Tools and Services 4.12 1786628667
  • Red Hat OpenShift Developer Tools and Services 4.13 1786628681
  • Red Hat OpenShift Developer Tools and Services 4.14 1786533561
  • Red Hat OpenShift Developer Tools and Services 4.15 1786533565
  • Red Hat OpenShift Developer Tools and Services 4.16 1787125166
  • Red Hat OpenShift Developer Tools and Services 4.17 1787124635
  • Red Hat OpenShift Developer Tools and Services 4.18 1787125069
  • Red Hat OpenShift Developer Tools and Services 4.19 1787124632
  • Red Hat OpenShift Developer Tools and Services 4.20 1787124925
  • Red Hat OpenShift Developer Tools and Services 4.21 1787125311
  • Red Hat OpenShift Developer Tools and Services 4.22 1787124779

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-53435 updated cvss 8.8

jenkins: Jenkins: Arbitrary code execution via deserialization of attacker-controlled configuration

  • Red Hat OpenShift Developer Tools and Services jenkins
    affected: no fix available
  • Red Hat OpenShift Developer Tools and Services 4.12 ocp-tools-4/jenkins-rhel8 1786628667
    fixed: vendor fix RHSA-2026:60247
  • Red Hat OpenShift Developer Tools and Services 4.13 ocp-tools-4/jenkins-rhel8 1786628681
    fixed: vendor fix RHSA-2026:60249
  • Red Hat OpenShift Developer Tools and Services 4.14 ocp-tools-4/jenkins-rhel8 1786533561
    fixed: vendor fix RHSA-2026:60248
  • Red Hat OpenShift Developer Tools and Services 4.15 ocp-tools-4/jenkins-rhel8 1786533565
    fixed: vendor fix RHSA-2026:60239
  • Red Hat OpenShift Developer Tools and Services 4.16 ocp-tools-4/jenkins-rhel9 1787125166
    fixed: vendor fix RHSA-2026:60251
  • Red Hat OpenShift Developer Tools and Services 4.17 ocp-tools-4/jenkins-rhel9 1787124635
    fixed: vendor fix RHSA-2026:60246
  • Red Hat OpenShift Developer Tools and Services 4.18 ocp-tools-4/jenkins-rhel9 1787125069
    fixed: vendor fix RHSA-2026:60250
show 5 more
  • Red Hat OpenShift Developer Tools and Services 4.19 ocp-tools-4/jenkins-rhel9 1787124632
    fixed: vendor fix RHSA-2026:60252
  • Red Hat OpenShift Developer Tools and Services 4.20 ocp-tools-4/jenkins-rhel9 1787124925
    fixed: vendor fix RHSA-2026:60259
  • Red Hat OpenShift Developer Tools and Services 4.21 ocp-tools-4/jenkins-rhel9 1787125311
    fixed: vendor fix RHSA-2026:60254
  • Red Hat OpenShift Developer Tools and Services 4.22 ocp-tools-4/jenkins-rhel9 1787124779
    fixed: vendor fix RHSA-2026:60256
  • Red Hat OpenShift Developer Tools and Services 4.12 ocp-tools-4/jenkins-agent-base-rhel8 1786628706 Red Hat OpenShift Developer Tools and Services 4.13 ocp-tools-4/jenkins-agent-base-rhel8 1786628711 Red Hat OpenShift Developer Tools and Services 4.14 ocp-tools-4/jenkins-agent-base-rhel8 1786628748 Red Hat OpenShift Developer Tools and Services 4.15 ocp-tools-4/jenkins-agent-base-rhel8 1786628726 Red Hat OpenShift Developer Tools and Services 4.16 ocp-tools-4/jenkins-agent-base-rhel9 1787124634 Red Hat OpenShift Developer Tools and Services 4.17 ocp-tools-4/jenkins-agent-base-rhel9 1787124986
    +5 more products
    Red Hat OpenShift Developer Tools and Services 4.18 ocp-tools-4/jenkins-agent-base-rhel9 1787124633 Red Hat OpenShift Developer Tools and Services 4.19 ocp-tools-4/jenkins-agent-base-rhel9 1787124663 Red Hat OpenShift Developer Tools and Services 4.20 ocp-tools-4/jenkins-agent-base-rhel9 1787125493 Red Hat OpenShift Developer Tools and Services 4.21 ocp-tools-4/jenkins-agent-base-rhel9 1787125679 Red Hat OpenShift Developer Tools and Services 4.22 ocp-tools-4/jenkins-agent-base-rhel9 1787125563
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
4 mo ago

Exploit prediction

51.17% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
GitHub 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
OSV 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
maven org.jenkins-ci.main:jenkins-core
<2.555.3
>=2.556, <2.568
2.555.3
2.568
bitnami jenkins
<2.555.3
>=2.556.0, <2.568.0
2.555.3
2.568.0

Affected products

  • Jenkins Project Jenkins
  • Red Hat OpenShift Developer Tools and Services 4.12
  • Red Hat OpenShift Developer Tools and Services 4.13
  • Red Hat OpenShift Developer Tools and Services 4.14
  • Red Hat OpenShift Developer Tools and Services 4.15
  • Red Hat OpenShift Developer Tools and Services 4.16
  • Red Hat OpenShift Developer Tools and Services 4.17
  • Red Hat OpenShift Developer Tools and Services 4.18
  • Red Hat OpenShift Developer Tools and Services 4.19
  • Red Hat OpenShift Developer Tools and Services 4.20
  • Red Hat OpenShift Developer Tools and Services 4.21
  • Red Hat OpenShift Developer Tools and Services 4.22

Classification

Weakness
  • CWE-502 Deserialization of Untrusted Data
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.