CVE DATABASE / CVE-2021-26086
CVE-2021-26086
Atlassian Jira Server and Data Center Path Traversal Vulnerability
Confirmed exploited in the wild. Added 2024-11-12.
Federal remediation due 2024-12-03.
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Summary
Affected versions of Atlassian Jira Server and Data Center allow remote attackers to read particular files via a path traversal vulnerability in the /WEB-INF/web.xml endpoint. The affected versions are before version 8.5.14, from version 8.6.0 before 8.13.6, and from version 8.14.0 before 8.16.1.
CVSS 3.1 breakdown
| Base score | 5.3 (MEDIUM) |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| Attack vector | NETWORK |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | LOW |
| Integrity | NONE |
| Availability | NONE |
Weakness type (CWE)
Affected products
Use our free CVE Lookup tool for the latest NVD record, or browse the full CISA KEV catalog.
References
- http://packetstormsecurity.com/files/164405/Atlassian-Jira-Server-Data-Center-8.4.0-File-Read.html
- https://jira.atlassian.com/browse/JRASERVER-72695
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26086
Data: NIST NVD + CISA KEV. NVD last modified 2025-10-24. Always verify against the vendor advisory before acting.