CVE-2026-2861 Details
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.
An information disclosure vulnerability exists in Foswiki versions prior to 2.1.10, specifically within the Changes component's Viewfile/Oops functionality. This vulnerability allows unauthorized users to access and disclose protected information by crafting specific HTTP requests to the affected endpoints. The issue can be exploited remotely without any authentication requirements.
Upgrade Foswiki to version 2.1.11 or apply the patch identified as 31aeecb58b64/d8ed86b10e46.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Feb 23, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| http://www.openwall.com/lists/oss-security/2026/03/15/1 | CVE | |
| http://www.openwall.com/lists/oss-security/2026/03/16/1 | CVE | |
| http://www.openwall.com/lists/oss-security/2026/03/16/3 | CVE | |
| https://foswiki.org/Tasks/Item15600 | [email protected] | Permissions Required |
| https://foswiki.org/Tasks/Item15601 | [email protected] | Permissions Required |
| https://github.com/foswiki/distro/commit/31aeecb58b64 | [email protected] | Patch |
| https://vuldb.com/?ctiid.347101 | [email protected] | Permissions RequiredVDB Entry |
| https://vuldb.com/?id.347101 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/?submit.753966 | [email protected] | Third Party AdvisoryVDB Entry |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
| CWE-200 | Exposure of Sensitive Information to an Unauthorized Actor | [email protected] |
| CWE-284 | Improper Access Control | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| foswiki foswiki | < 2.1.11 |
CPE
Remediation
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Change History
6 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Mar 16, 2026 | CVE Modified | CVE |
| Mar 16, 2026 | CVE Modified | CVE |
| Feb 26, 2026 | Initial Analysis | [email protected] |
| Feb 21, 2026 | New CVE Received | [email protected] |