Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC PR UI S C I A CVSS EPSS %ile KEV N L N N U H H H 9.8 1.0000 100.0 YES
AFFECTED Product Versions Fixed Confluence Server unspecified – — Confluence Data Center unspecified – —
TIMELINE Jan 25 Reserved by atlassian Aug 30 Published (CNA: atlassian) Nov 3 Added to CISA KEV, remediation due 2021-11-17
In affected versions of Confluence Server and Data Center, an OGNL injection vulnerability exists that would allow an unauthenticated attacker to execute arbitrary code on a Confluence Server or Data Center instance. The affected versions are before version 6.13.23, from version 6.14.0 before 7.4.11, from version 7.5.0 before 7.11.6, and from version 7.12.0 before 7.12.5.
| Date | Event | Detail |
|---|---|---|
| January 25, 2021 | Reserved | Reserved by atlassian |
| August 30, 2021 | Published | Published (CNA: atlassian) |
| November 3, 2021 | KEV ADDED | Added to CISA KEV, remediation due 2021-11-17 |
Authoritative record: CVE-2021-26084 at cve.org
Vendors: atlassian
Weaknesses: CWE-917
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2021-26084 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
