CVE-2021-26069

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-03-22 · updated 2026-06-17
Weakness: CWE-74

Description

Affected versions of Atlassian Jira Server and Data Center allow unauthenticated remote attackers to download temporary files and enumerate project keys via an Information Disclosure vulnerability in the /rest/api/1.0/issues/{id}/ActionsAndOperations API endpoint. The affected versions are before version 8.5.11, from version 8.6.0 before 8.13.3, and from version 8.14.0 before 8.15.0.

Affected products

Atlassian Data Center: before 8.5.11; from 8.6.0 before 8.13.3 — fixed in 8.13.3, 8.5.11
Atlassian Jira: before 8.5.11 — fixed in 8.5.11
Atlassian Jira: from 8.14.0 before 8.15.0 — fixed in 8.15.0
Atlassian Jira: from 8.6.0 before 8.13.3; from 8.14.0 before 8.15.0 — fixed in 8.13.3, 8.15.0

How to fix

Upgrade to a fixed version: Atlassian Data Center 8.13.3, 8.5.11; Atlassian Jira 8.5.11; Atlassian Jira 8.15.0; Atlassian Jira 8.13.3, 8.15.0. Check the vendor advisory for mitigations.

References

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