CVE-2026-21577: confluence data center from 9.0.1 (inclusive), through 9.0.3 (inclusive), from 9.1.0 (inclusive), through 9.1.1…

Affected technology

confluence data center · from 9.0.1 (inclusive), through 9.0.3 (inclusive)
atlassian

confluence data center · from 9.1.0 (inclusive), through 9.1.1 (inclusive)
atlassian

confluence data center · from 9.2.0 (inclusive), through 9.2.15 (inclusive)
atlassian

confluence data center · from 9.3.1 (inclusive), through 9.3.2 (inclusive)
atlassian

confluence data center · from 9.4.0 (inclusive), through 9.4.1 (inclusive)
atlassian

confluence data center · from 9.5.1 (inclusive), through 9.5.4 (inclusive)
atlassian

confluence data center · from 10.0.2 (inclusive), through 10.0.3 (inclusive)
atlassian

confluence data center · from 10.1.0 (inclusive), through 10.1.2 (inclusive)
atlassian

confluence data center · from 10.2.0 (inclusive), through 10.2.6 (inclusive)
atlassian

Confluence Data Center · 10.2.0 to 10.2.6, 10.1.0 to 10.1.2, 10.0.2 to 10.0.3, 9.5.1 to 9.5.4, 9.4.0 to 9.4.1, 9.3.1 to 9.3.2, 9.2.0 to 9.2.15, 9.1.0 to 9.1.1, 9.0.1 to 9.0.3
Atlassian

Description’s affected range: versions 9.0.1

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · Low privileges required · No user interaction required

What an attacker can do

The source reports that an attacker could disrupt service under the conditions described by the source. Vendor/CNA’s CVSS 4.0 assessment (base score 7.1/10) rates confidentiality and integrity impact as none; availability impact as high.