CVE-2026-2861

Name: CVE-2026-2861
Creator: NVD / NIST
Published: 2026-02-21T06:17:01.897+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.46%

Last modified Jun 17, 2026

CVE-2026-2861 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. A vulnerability was detected in Foswiki up to 2.1.10. The affected element is an unknown function of the component Changes/Viewfile/Oops. EPSS estimates a 0.46% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS 4.0

5.5/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.46%

36.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Foswiki	Foswiki	< 2.1.11

References

https://foswiki.org/Tasks/Item15600Permissions Required
https://foswiki.org/Tasks/Item15601Permissions Required
https://github.com/foswiki/distro/commit/31aeecb58b64Patch
https://vuldb.com/?ctiid.347101Permissions Required, VDB Entry
https://vuldb.com/?id.347101Third Party Advisory, VDB Entry
https://vuldb.com/?submit.753966Third Party Advisory, VDB Entry
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

Timeline

Published: Feb 21, 2026
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2026-2861?

How severe is CVE-2026-2861?

CVE-2026-2861 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.46% probability of exploitation in the next 30 days.

How do I fix CVE-2026-2861?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-2861?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST