HOMEVULNERABILITIESCVE-2026-2861
MEDIUM

CVE-2026-2861

CWE-200Published: February 21, 2026· Updated: Feb 26, 2026

5.3
CVSS v3.1
EPSS:0.03%probability of exploitation in 30 daysPercentile:10.3th

Official 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.

NVD Source

Technical Analysis

CVE-2026-2861 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

From a weakness classification perspective (CWE-200): Information exposure vulnerabilities leak sensitive data to unauthorized actors.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected Vendors & Products

foswiki1 product
foswiki
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/foswiki/distro/commit/31aeecb58b64
ADVISORYhttps://vuldb.com/?id.347101
ADVISORYhttps://vuldb.com/?submit.753966

All References (6)

→
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

Quick Facts

CVE IDCVE-2026-2861
CVSS Score5.3 / 10
SeverityMEDIUM
WeaknessCWE-200
CISA KEVNo
EPSS (30d)0.03%
Affected1 vendor
PublishedFeb 21, 2026

Related CVEs (CWE-200)

CVE-2026-27604
10.0
CVE-2026-40965
10.0
CVE-2026-54305
9.9
CVE-2026-21515
9.9
CVE-2026-40498
9.8
CVE-2026-43992
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-2861 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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