CVE-2021-26086VulnerabilityPublished 11/12/2024Updated 10/24/2026
CVE-2021-26086: Atlassian Jira Server and Data Center Path Traversal Vulnerability
Affects Atlassian Jira Server and Data CenterSource CISA KEV
Severity
HighNo CVSS score published yet
- Exploitation
Actively exploited – in CISA KEV since 11/12/2024
- KEV deadline
- 12/03/2024
- EPSS
- 100.0% chance of exploitation in 30 days – higher than 99% of CVEs
What to do
CISA required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Description
Atlassian Jira Server and Data Center contain a path traversal vulnerability that allows a remote attacker to read particular files in the /WEB-INF/web.xml endpoint.