Medium severity · published Feb 21, 2026
CVE-2026-2861
Foswiki Changes/Viewfile/Oops information disclosure
5.3
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 44% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FO
Foswiki ·
2.1.0; 2.1.1; 2.1.2; 2.1.3; 2.1.4; 2.1.5; +5 more · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-2861
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-2861
Permissions Required
https://foswiki.org/Tasks/Item15600
Permissions Required
https://foswiki.org/Tasks/Item15601
Patch
https://github.com/foswiki/distro/commit/31aeecb58b64
Permissions Required
https://vuldb.com/?ctiid.347101
Third Party Advisory
https://vuldb.com/?id.347101
Third Party Advisory
https://vuldb.com/?submit.753966