UpHeron
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Servers and applications

CVE-2021-26086

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.

Actively exploited: CISA added it to its Known Exploited Vulnerabilities catalog on 12 Nov 2024.

Severity
Medium 5.3
Published
16 Aug 2021
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
8.5.14, 8.13.6, 8.16.1
Sources
NVD

Affected software

SoftwareAffected versions
JiraServers and applications · cpe:a:atlassian:jira_data_center
  • Every version before 8.5.14
  • From 8.6.0 before 8.13.6
  • From 8.14.0 before 8.16.1
JiraServers and applications · cpe:a:atlassian:jira_server
  • Every version before 8.5.14
  • From 8.6.0 before 8.13.6
  • From 8.14.0 before 8.16.1

Known exploited

CISA name
Atlassian Jira Server and Data Center Path Traversal Vulnerability
Required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Due for US agencies
3 Dec 2024
Used in ransomware
Not known

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-26086
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-26086