Unauthenticated sensitive information disclosure
Published Jul 21, 2026 · Updated Jul 21, 2026
Information disclosure in Atlassian Confluence Data Center allows remote attackers to read sensitive information without authentication. Atlassian has not published the vulnerable component, request path, data source, or the operation that exposes the information. Network access to an affected self-managed instance is required; no integrity or availability impact is reported, and disclosure depends on additional attack requirements.
Summary
What happened
Information disclosure in Atlassian Confluence Data Center allows remote attackers to read sensitive information without authentication. Atlassian has not published the vulnerable component, request path, data source, or the operation that exposes the information. Network access to an affected self-managed instance is required; no integrity or availability impact is reported, and disclosure depends on additional attack requirements.
The record
- CVE
- CVE-2026-21579
- Published
- Jul 21, 2026
- Updated
- Jul 21, 2026
- Vendor
- Atlassian
- Product
- Confluence Data Center
- Classifications
- CWE-200, T1213.001
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 21, 2026CVE publishedPublication date reported by the CVE source.
- Jul 21, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.2 to 10.0.3
- Affected versionversion=10.1.0 to 10.1.2
- Affected versionversion=10.2.0 to 10.2.13
- Affected versionversion=7.19.26 to 7.19.30
- Affected versionversion=8.5.14 to 8.5.31
- Affected versionversion=8.9.5 to 8.9.8
- Affected versionversion=9.0.1 to 9.0.3
- Affected versionversion=9.1.0 to 9.1.1
- Affected versionversion=9.2.0 to 9.2.21
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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