SB20260819150 - Improper Authentication in Jira Software Data Center
Published: August 19, 2026
Security Bulletin ID
SB20260819150
CSH Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper Authentication (CVE-ID: CVE-2026-21582)
CWE-ID: CWE-287 - Improper Authentication
CVSSv4: 7.4 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to perform actions as another user.
The vulnerability exists due to broken authentication and session management in Jira Data Center when handling authentication and session management. A remote attacker can exploit the authentication and session management flaw to perform actions as another user.
User interaction is required.
Remediation
Install update from vendor's website.