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.

According to its self-reported version number, the Atlassian Confluence application running on the remote host is prior to 9.2.22 or 9.3.x prior to 10.2.14. It is, therefore, affected by multiple vulnerabilities, including flaws in bundled third-party dependencies :

- Multiple server-side request forgery (SSRF) vulnerabilities in the bundled axios dependency. (CVE-2026-42043, CVE-2025-62718, CVE-2026-40175, CVE-2026-44492)

- A remote code execution vulnerability in the bundled lodash dependency. (CVE-2026-4800)

- A HTTP request smuggling vulnerability in the bundled Eclipse Jetty dependency. (CVE-2026-2332)

- A prototype pollution vulnerability in the bundled axios dependency. (CVE-2026-42264)

- Multiple injection vulnerabilities in the bundled axios dependency. (CVE-2026-44494, CVE-2026-44490, CVE-2026-42041, CVE-2026-42035, CVE-2026-42033)

- A remote code execution vulnerability in the bundled form-data dependency. (CVE-2026-12143)

- Multiple information disclosure vulnerabilities in the bundled axios dependency. (CVE-2026-44487, CVE-2026-44486)

- A file inclusion vulnerability in the bundled node-tar dependency. (CVE-2026-31802)

- An information disclosure vulnerability in Atlassian Confluence. (CVE-2026-21579)

- A denial of service vulnerability in the bundled serialize-javascript dependency. (CVE-2026-34043)

- Multiple denial of service vulnerabilities in the bundled Netty dependency. (CVE-2026-42583, CVE-2026-42587)

- Multiple denial of service vulnerabilities in the bundled axios dependency. (CVE-2026-44496, CVE-2026-44488)

- A file inclusion vulnerability in the bundled fast-uri dependency. (CVE-2026-6321)

- An injection vulnerability in the bundled fast-uri dependency. (CVE-2026-6322)

- An injection vulnerability in the bundled js-cookie dependency. (CVE-2026-46625)

- A denial of service vulnerability in the bundled picomatch dependency. (CVE-2026-33671)

- A denial of service vulnerability. (CVE-2026-48779)

- A denial of service vulnerability in Atlassian Confluence. (CVE-2026-21577)

- A remote code execution vulnerability in the bundled axios dependency. (CVE-2026-44495)

- An injection vulnerability in the bundled logback dependency. (CVE-2025-11226)

Note that the scanner has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of Atlassian Confluence Server running on the remote host is affected by a vulnerability as referenced in the CONFSERVER-104340 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, allows an unauthenticated attacker to view sensitive information via an Information Disclosure     vulnerability. (CVE-2026-21579)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Type	Severity
115694	Atlassian Confluence 9.3.x < 10.2.14 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	Version Based	high
115693	Atlassian Confluence < 9.2.22 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	Version Based	high
330086	Atlassian Confluence 7.17.x / 7.19.x / 8.5.x / 8.9.x / 9.0.1 / 9.1.x / 9.2.x < 9.2.22 / 10.0.2 / 10.1.x / 10.2.x < 10.2.14 (CONFSERVER-104340)	Nessus	CGI abuses	Combined	high

Detections

Analytics

CVE-2026-21579

high

Tenable Plugins

high

high

high