What’s Vulnerable › Vulnerabilities

CVE-2026-2861: Foswiki Changes/Viewfile/Oops information disclosure

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-02-21 · updated 2026-06-17
• Weakness: CWE-200

Description

A vulnerability was detected in Foswiki up to 2.1.10. The affected element is an unknown function of the component Changes/Viewfile/Oops. The manipulation results in information disclosure. It is possible to launch the attack remotely. The exploit is now public and may be used. Upgrading to version 2.1.11 is sufficient to fix this issue. The patch is identified as 31aeecb58b64/d8ed86b10e46. Upgrading the affected component is recommended.

Affected products

• Foswiki: before 2.1.11 — fixed in 2.1.11

How to fix

Upgrade to a fixed version: Foswiki 2.1.11. Check the vendor advisory for mitigations.

References

• https://foswiki.org/Tasks/Item15600
• https://foswiki.org/Tasks/Item15601
• https://github.com/foswiki/distro/commit/31aeecb58b64
• https://vuldb.com/?ctiid.347101
• https://vuldb.com/?id.347101
• https://vuldb.com/?submit.753966
• http://www.openwall.com/lists/oss-security/2026/03/15/1
• http://www.openwall.com/lists/oss-security/2026/03/16/1
• http://www.openwall.com/lists/oss-security/2026/03/16/3

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