CVE-2026-108725Medium· 5.4▾ TwilightPoC available

Cheshire Cat AI core through 2.0.23 contains a stored cross-site scripting vulnerability in the uploads plugin that allows authenticated users to upload HTML files via POST /uploads without type restrictions

▾ Twilight zone — High severity, or a signal on a lesser flaw

Depth score42/ 100 · Moderate

impact 29.7 · likelihood 0.1 · exploitation 12

⚡ Agent-ready:Raw markdown ↗JSON ↗

Proof of concept

A public proof-of-concept already exists for this vulnerability — see Exploit availability below.

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Published

Oct 11, 2026

Updated

Oct 16, 2026

CVSS

5.4

Vendor

cheshire-cat-ai

Product

core

CWE

CWE-79

Depth score

42 · Moderate

EPSS

0.26% · p18

Platforms

—

Source

NVD

Vector

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

CISA SSVC

decided 2026-10-13

Exploitation: poc
Automatable: no
Technical impact: partial

Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.

EPSS history

Exploit-prediction probability, daily snapshots since Oct 13.

0.2% → 0.3%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

5 events · 15 days

Oct 11, 2026Published
Disclosed via NVD
Oct 13, 2026EPSS first tracked
0.2%
Oct 15, 2026Public exploit observed
Exploit / PoC code exists
Oct 16, 2026Record revised
Last analysed / modified upstream
Oct 26, 2026EPSS peak
0.2% → 0.3%

cheshire-cat-ai CWE-79 #nvd #cve.org #exploit-available

Affected

core <= 2.0.23

Full technical detail▾

Overview

Cheshire Cat AI core through 2.0.23 contains a stored cross-site scripting vulnerability in the uploads plugin that allows authenticated users to upload HTML files via POST /uploads without type restrictions. Attackers can send the public GET /uploads/{path} URL to a signed-in victim, executing script in the application origin with the victim's access_token cookie, including administrators.

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

Change history

Field changes observed since this record was first indexed.

Oct 15, 2026Public exploit / PoC published

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#nvd#cve.org#exploit-available

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