CVE-2021-26085
CISA KEVPublished March 28, 2022 · Updated April 3, 2026
high
Official Description+
Affected versions of Atlassian Confluence Server allow remote attackers to view restricted resources via a pre-authorization arbitrary file read vulnerability in the /s/ endpoint.
Affected Products
| Vendor | Product |
|---|---|
| Atlassian | Confluence Server |
Patch Status
Patch by 2022-04-18
Recommended Actions
- Check if your systems use any of the affected products listed above.
- Apply vendor patches immediately if available.
- This vulnerability is in CISA's Known Exploited Vulnerabilities catalog — prioritize remediation.
- Monitor vendor advisories for updates and additional mitigations.
- Review logs for indicators of compromise related to CVE-2021-26085.