CVE-2021-26086Affected 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.
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It affects Atlassian Jira Server and 1 other product. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Nov 12, 2024; federal agencies had to remediate by Dec 3, 2024. Treat that date as your deadline.
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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
- 5.3 MEDIUM (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- Weakness (CWE)
- CWE-22
- Known exploited
- Added to CISA KEV Nov 12, 2024; federal remediation due Dec 3, 2024Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- EPSS (exploitation in the next 30 days)
- 100.00% (percentile 100)
- Assigned by
- atlassian
- NVD analysis
- Analyzed
- Record last updated
- Oct 21, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Atlassian Jira Server atlassian:jira_server (from the name) | from unspecified before 8.5.14; from 8.6.0 before unspecified; from unspecified before 8.13.6; from 8.14.0 before unspecified; from unspecified before 8.16.1 | CNA record |
Atlassian Jira Data Center atlassian:jira_data_center (from the name) | from unspecified before 8.5.14; from 8.6.0 before unspecified; from unspecified before 8.13.6; from 8.14.0 before unspecified; from unspecified before 8.16.1 | CNA record |
atlassian jira_server atlassian:jira_server | before 8.5.14; from 8.6.0 before 8.13.6; from 8.14.0 before 8.16.1 | CISA ADP |
atlassian jira_data_center atlassian:jira_data_center | before 8.5.14; from 8.6.0 before 8.13.6; from 8.14.0 before 8.16.1 | CISA ADP |
atlassian jira_data_center atlassian:jira_data_center | before 8.5.14; from 8.6.0 before 8.13.6; from 8.14.0 before 8.16.1 | NVD |
atlassian jira_server atlassian:jira_server | before 8.5.14; from 8.6.0 before 8.13.6; from 8.14.0 before 8.16.1 | NVD |
References
- https://jira.atlassian.com/browse/JRASERVER-72695x-refsource-misc, issue-tracking, vendor-advisory
- http://packetstormsecurity.com/files/164405/Atlassian-Jira-Server-Data-Center-8.4.0-File-Read.htmlx-refsource-misc, exploit, third-party-advisory, vdb-entry
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26086us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.