# CVE-2026-21582

> CVE-2026-21582. CVSS 8.8 (CVSS 4.0).

Canonical: https://rewindex.com/cve/CVE-2026-21582
Last updated: 2026-10-22T17:09:59Z

- Published: 2026-08-18 22:00 UTC · Updated: 2026-10-22 17:09 UTC · Assigner: atlassian
- CVSS: 8.8 (CVSS 4.0) · Severity: High
- EPSS: 0.46%, 40th percentile (scored 2026-10-25)
- CISA KEV: no

## Description

This High severity BASM (Broken Authentication & Session Management) vulnerability known as CVE-2026-21582 was introduced in version 7.2.1 of Crowd Data Center.  This BASM (Broken Authentication & Session Management) vulnerability, with a CVSS Score of 8.8, allows an unauthenticated attacker to perform actions as another user. 	 	Atlassian recommends that Crowd Data Center customers upgrade to latest version, if you are unable to do so, upgrade your instance to one of the specified supported fixed versions: 		 		Crowd Data Center 7.2: Upgrade to a release greater than or equal to 7.2.2 		 		 	 	See the release notes (https://confluence.atlassian.com/crowd/crowd-release-notes-199094.html). You can download the latest version of Crowd Data Center from the download center (https://www.atlassian.com/software/crowd/download-archive).  	 	This vulnerability was reported via our Penetration Testing program.

## Affected vendors and products

- Atlassian: Crowd Data Center

## Tracked companies

- [Bitbucket](https://rewindex.com/company/bitbucket.md)
- [Jira](https://rewindex.com/company/jira.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-21582)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-21582)
- [https://confluence.atlassian.com/pages/viewpage.action?pageId=1821999768](https://confluence.atlassian.com/pages/viewpage.action?pageId=1821999768)
- [https://jira.atlassian.com/browse/CWD-6562](https://jira.atlassian.com/browse/CWD-6562)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-21582 · Markdown: https://rewindex.com/cve/CVE-2026-21582.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-21582 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:15:46.353Z