CVE-2021-26086: Atlassian Jira Server and Data Center Path Traversal Vulnerability
CVE-2021-26086 · Severity: critical · CVSS 5.3 · Exploited in the wild · Published 2024-11-12
Atlassian Jira Server and Data Center are vulnerable to path traversal via the /WEB-INF/web.xml endpoint. A remote, unauthenticated attacker can exploit this to read sensitive configuration files. This vulnerability has been observed being exploited in the wild.
Yes. CVE-2021-26086 is known to be exploited in the wild, first recorded on 12 November 2024. Treat it as urgent.
How severe is CVE-2021-26086?
Critical severity, with a CVSS score of 5.3, published 12 November 2024.
Which products and versions are affected?
Atlassian Jira Server < 8.5.14, 8.6.0 to < 8.13.6, 8.14.0 to < 8.16.1; Atlassian Jira Data Center < 8.5.14, 8.6.0 to < 8.13.6, 8.14.0 to < 8.16.1.
Is there a fix for CVE-2021-26086?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2021-26086 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2021-26086?
Check whether you run Atlassian Data Center, Atlassian Jira Data Center or Atlassian Jira Server. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Affected products
Atlassian Jira Server < 8.5.14, 8.6.0 to < 8.13.6, 8.14.0 to < 8.16.1
Atlassian Jira Data Center < 8.5.14, 8.6.0 to < 8.13.6, 8.14.0 to < 8.16.1
Timeline
2021-08-30: disclosed: Initial NVD analysis date
2024-11-12: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
2024-11-12: exploited: Confirmed as exploited in the wild per CISA KEV entry