7.1

CVE-2026-21588

This High severity DoS (Denial of Service) vulnerability was introduced in versions 8.9.0, 9.0.1, 9.1.0, 9.2.0, 9.3.1, 9.4.0, 9.5.1, 10.0.2, 10.1.0, and 10.2.0 of Confluence Data Center.

This DoS (Denial of Service) vulnerability, with a CVSS Score of 7.1, allows an authenticated attacker to cause a resource to be unavailable for its intended users by temporarily or indefinitely disrupting services of a host connected to a network.

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 9.2.24

 Confluence Data Center 10.2: Upgrade to a release greater than or equal to 10.2.17

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 Penetration Testing program.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerAtlassian
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Produkt Confluence Data Center
Version 10.2.0 to 10.2.15
Status affected
Version 10.1.0 to 10.1.2
Status affected
Version 10.0.2 to 10.0.3
Status affected
Version 9.5.1 to 9.5.4
Status affected
Version 9.4.0 to 9.4.1
Status affected
Version 9.3.1 to 9.3.2
Status affected
Version 9.2.0 to 9.2.23
Status affected
Version 9.1.0 to 9.1.1
Status affected
Version 8.9.7 to 8.9.8
Status affected
Version 10.2.17 to 10.2.18
Status unaffected
Version 9.2.24 to 9.2.25
Status unaffected
VulnDex Vulnerability Enrichment
Diese Information steht angemeldeten Benutzern zur Verfügung. Login Login
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.29% 0.215
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
Atlassian 7.1 0 0
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/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
CWE-400 Uncontrolled Resource Consumption

The product does not properly control the allocation and maintenance of a limited resource.

https://confluence.atlassian.com/pages/viewpage.action?pageId=1822852209
https://jira.atlassian.com/browse/CONFSERVER-104451