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CVE-2026-21579

HIGH
7.5
CVSS Score
Published: July 21, 2026 at 05:00 PM UTC
Updated: October 24, 2026 at 07:10 PM UTC
1 product affected across 1 vendorConfluence Data Center

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Severity
HIGH7.5
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Confluence Data Center· Atlassianatlassian-app
95%
10.0.2 ≤ v ≤ 10.0.310.1.0 ≤ v ≤ 10.1.210.2.0 ≤ v ≤ 10.2.137.19.26 ≤ v ≤ 7.19.308.5.14 ≤ v ≤ 8.5.318.9.5 ≤ v ≤ 8.9.89.0.1 ≤ v ≤ 9.0.39.1.0 ≤ v ≤ 9.1.19.2.0 ≤ v ≤ 9.2.218.5.228.5.238.5.248.5.258.5.268.5.278.5.288.5.298.5.308.5.319.2.109.2.119.2.129.2.139.2.149.2.159.2.169.2.179.2.189.2.199.2.29.2.209.2.219.2.39.2.49.2.59.2.69.2.79.2.89.2.9
Vendor states this is fixed in 10.2.14 (unaffected)
Vendor states this is fixed in 9.2.22 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Vendor Advisory
Source: cverecord
https://confluence.atlassian.com/pages/viewpage.action?pageId=1821999345
Issue Tracking
Source: cverecord
https://jira.atlassian.com/browse/CONFSERVER-104340

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-200

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