SB20260619102 - Multiple vulnerabilities in Jira Software Data Center

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB20260619102

SB20260619102 - Multiple vulnerabilities in Jira Software Data Center

Published: June 19, 2026

Security Bulletin ID SB20260619102
CSH Severity
High
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 33% Medium 67%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 vulnerabilities.


1) Deserialization of Untrusted Data (CVE-ID: CVE-2026-42211)

CWE-ID: CWE-502 - Deserialization of Untrusted Data

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


The vulnerability allows a remote attacker to execute arbitrary code.

The vulnerability exists due to deserialization of untrusted data in React Router framework mode when handling external requests in an application that also contains an existing prototype pollution vulnerability. A remote attacker can send crafted external requests to execute arbitrary code.

Exploitation requires chaining with a pre-existing prototype pollution vulnerability in the application code and affects framework mode only.


2) Resource exhaustion (CVE-ID: CVE-2026-34077)

CWE-ID: CWE-400 - Resource exhaustion

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


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to uncontrolled resource consumption in the single-fetch serialization algorithm when encoding specific types of data into server responses. A remote attacker can supply crafted input that is reflected into a server response to cause a denial of service.

Only React Router v7 framework mode and Remix with single fetch enabled are vulnerable.


3) Resource exhaustion (CVE-ID: CVE-2026-42342)

CWE-ID: CWE-400 - Resource exhaustion

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


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to uncontrolled resource consumption in the __manifest endpoint when handling crafted requests with unbounded path expansion. A remote attacker can send a specially crafted request to cause a denial of service.

Only React Router Framework Mode applications are affected; Declarative Mode and Data Mode are not impacted.


Remediation

Install update from vendor's website.

References