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Severe, 6 weeks1496Projects326

1496 severe, 6 weeks · 326 projects

AtlassianCVE-2026-21579

Atlassian Confluence Data Center: information disclosure

Atlassian

CVE-2026-21579 · Published Jul 21, 2026 · updated Aug 11, 2026

High8.2
No fix yet
Atlassian advisory

This High severity Information Disclosure vulnerability was introduced in versions 7.17.0, 7.19.0, 8.5.0, 8.9.0, 9.0.1, 9.1.0, 9.2.0, 10.0.2, 10.1.0, and 10.2.0 of Confluence Data Center.

This Information Disclosure vulnerability, with a CVSS Score of 8.2, allows an unauthenticated attacker to view sensitive information via an Information Disclosure vulnerability.

Atlassian recommends that Confluence Data Center customers upgrade to latest version, if you are unable to do so, upgrade your instance to one of the specified supported fixed versions:

Confluence Data Center 9.2: Upgrade to a release greater than or equal to 9.2.22

Confluence Data Center 10.2: Upgrade to a release greater than or equal to 10.2.14

See the release notes ([https://confluence.atlassian.com/doc/confluence-release-notes-327.html]). You can download the latest version of Confluence Data Center from the download center ([https://www.atlassian.com/software/confluence/download-archives]).

This vulnerability was reported via our Atlassian (Internal) program.

Affected versions

PackageAffectedFixed in
Confluence Data Center
Product
<= 10.2.0 to 10.2.13No fix yet
<= 10.1.0 to 10.1.2No fix yet
<= 10.0.2 to 10.0.3No fix yet
<= 9.2.0 to 9.2.21No fix yet
Details and references
CVSS 4.0
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Severity from
the vendor (its own CVE record or advisory)
Weakness
CWE-200

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