PT-2026-34844 · Unknown · Anything-Llm

Sajdakabir + 1 · Published 2026-04-24 · Updated 2026-04-25 · CVE-2026-41318

Positive Technologies (AI Summary)

CVSS v3.1

5.4

Medium

Base vector

AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:L/A:N

Name of the Vulnerable Software and Affected Versions AnythingLLM versions prior to 1.12.1

Description The in-chat markdown renderer contains an unsafe custom rule for images that interpolates the markdown image alt text into an HTML alt attribute without HTML encoding. While most call-sites use DOMPurify.sanitize() for defense-in-depth, the Chartable component renders chart captions without sanitization. An attacker capable of influencing the LLM output—such as through indirect prompt injection in a shared workspace document or by creating a chart record in a multi-user workspace—can trigger stored DOM-level Cross-Site Scripting (XSS), which is a vulnerability allowing the execution of malicious scripts in a user's browser. The chat history is loaded via the 'GET /api/workspace/:slug/chats' endpoint and rendered in the UI.

Recommendations Update to version 1.12.1.

Exploit

Fix

XSS

Improper Encoding or Escaping of Output

Weakness Enumeration

CWE-1336

CWE-79

CWE-116

Related Identifiers

CVE-2026-41318

Affected Products

Anything-Llm

References · 4

• 🔥 https://github.com/Mintplex-Labs/anything-llm/security/advisories/GHSA-4q6m-qh3w-9gf5 · Exploit
• https://github.com/Mintplex-Labs/anything-llm/commit/f5fa03f4728e483949f6360093bc3ea1ef555535 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-41318 · Security Note
• https://twitter.com/CVEnew/status/2048099325520085371 · Twitter Post