Path Traversal in Atlassian Jira Data Center
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…
Vulnerability class: Path Traversal (Directory Traversal)
EPSS: 1.000 (100.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 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.
Affected products
- Atlassian Jira Data Center — versions unspecified, 8.6.0, 8.14.0
- Atlassian Jira_data_center
- Atlassian Jira Server — versions unspecified, 8.6.0, 8.14.0
- Atlassian Jira_server
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Public proof-of-concept exploits
References
- security@atlassian.com (x_refsource_MISC, Issue Tracking, Vendor Advisory)
- security@atlassian.com (Exploit, VDB Entry, Third Party Advisory, x_refsource_MISC)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2021-26086?
- CVE-2021-26086 is a medium-severity vulnerability in Atlassian Jira Data Center, classified under Path Traversal. CVSS score: 5.3/10. Published 2021-08-16.
- How severe is CVE-2021-26086?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2021-26086 known to be exploited?
- Yes. CVE-2021-26086 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2024-11-12), indicating it is being actively exploited. 49 public proof-of-concept repositories are indexed.