SB2026032347 - Multiple vulnerabilities in Jenkins and Jenkins LTS

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Main Vulnerability Database SB2026032347

SB2026032347 - Multiple vulnerabilities in Jenkins and Jenkins LTS

Published: March 23, 2026

Security Bulletin ID SB2026032347
CSH Severity
High
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 50% Medium 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Link following (CVE-ID: CVE-2026-33001)

CWE-ID: CWE-59 - Improper Link Resolution Before File Access ('Link Following')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to an insecure link following issue during the extraction of .tar and .tar.gz archives. A remote user can create a specially crafted symbolic link to a critical file on the system and overwrite it with privileges of the application.


2) Reliance on Reverse DNS Resolution for a Security-Critical Action (CVE-ID: CVE-2026-33002)

CWE-ID: CWE-350 - Reliance on Reverse DNS Resolution for a Security-Critical Action

CVSSv4: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber


The vulnerability allows a remote attacker to perform an Anti DNS Pinning (DNS Rebinding) attack.

The vulnerability exists due to the DNS rebinding issue in WebSocket CLI origin validation. A remote attacker can perform DNS rebinding attack and bypass origin validation on the system.


Remediation

Install update from vendor's website.

References