Information disclosure in Foswiki
CVE-2026-2861
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.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.007 (52.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.007 · change: +0.003
Affected products
- Foswiki
- Foswiki — versions 2.1.0, 2.1.1, 2.1.2
Weakness classification (CWE)
References
- vuldb.com/ (VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/ (VDB Entry, Third Party Advisory, third-party-advisory)
- foswiki.org/Tasks/Item15600 (Permissions Required, related)
- foswiki.org/Tasks/Item15601 (Permissions Required, related)
- github.com/foswiki/distro/commit/31aeecb58b64 (Patch, patch)
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2026-2861?
- CVE-2026-2861 is a medium-severity vulnerability in Foswiki, classified under Information Disclosure. CVSS score: 5.3/10. Published 2026-02-21.
- How severe is CVE-2026-2861?
- Medium severity. CVSS v3 base score is 5.3 out of 10.