CVE-2026-53435
Jenkins Deserialization Vulnerability Leads to Remote Code Execution
Description
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.
INFO
Published Date :
June 10, 2026, 2:16 p.m.
Last Modified :
June 11, 2026, 1:26 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | ||||
| CVSS 3.1 | HIGH | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c |
Solution
- Update Jenkins to version 2.568 or later.
- Update LTS Jenkins to version 2.555.3 or later.
- Restrict XML configuration submissions to trusted users.
- Review Jenkins security configuration.
Public PoC/Exploit Available at Github
CVE-2026-53435 has a 2 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-53435.
| URL | Resource |
|---|---|
| https://www.jenkins.io/security/advisory/2026-06-10/#SECURITY-3707 | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-53435 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-53435
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
patch diff analysis, source tracing, and PoC generation via Claude Code + MCP
Shell
An offensive security researcher + an AI vs. a fresh n-day: building the first public PoC for CVE-2026-53435 in one Friday night. Raw 8h20m log inside.
Python Dockerfile Groovy
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-53435 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-53435 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jun. 11, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:* versions up to (excluding) 2.568 *cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:* versions up to (excluding) 2.555.3 Added Reference Type Jenkins Project: https://www.jenkins.io/security/advisory/2026-06-10/#SECURITY-3707 Types: Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 10, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-502 -
New CVE Received by [email protected]
Jun. 10, 2026
Action Type Old Value New Value Added Description 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. Added Reference https://www.jenkins.io/security/advisory/2026-06-10/#SECURITY-3707