# CVE-2021-26086: Atlassian Jira Server and Data Center Path Traversal Vulnerability

> CVE-2021-26086: Atlassian Jira Server and Data Center Path Traversal Vulnerability. CVSS 5.3 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2021-26086
Last updated: 2025-10-21T23:25:37Z

- Published: 2021-08-16 00:15 UTC · Updated: 2025-10-21 23:25 UTC · Assigner: atlassian
- CVSS: 5.3 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- EPSS: 100.0%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2024-11-12, federal due date 2024-12-03, ransomware use: Unknown

## Description

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.

## CISA required action

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

## Affected vendors and products

- atlassian: jira\_data\_center
- atlassian: jira\_server
- Atlassian: Jira Data Center
- Atlassian: Jira Server

## Tracked companies

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

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2021-26086)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2021-26086)
- [http://packetstormsecurity.com/files/164405/Atlassian-Jira-Server-Data-Center-8.4.0-File-Read.html](http://packetstormsecurity.com/files/164405/Atlassian-Jira-Server-Data-Center-8.4.0-File-Read.html)
- [https://jira.atlassian.com/browse/JRASERVER-72695](https://jira.atlassian.com/browse/JRASERVER-72695)

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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-2021-26086 · Markdown: https://rewindex.com/cve/CVE-2021-26086.md · JSON: https://rewindex.com/api/v1/cves/CVE-2021-26086 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:15:16.137Z