CVE•Published 2025-11-29•Modified 2026-10-07•1 article on news•6 live references•NVD data

CVE-2025-66201Librechat · Librechat

Vulnerability data via NVD (ingested)

CVSS v3.1

8.1

HIGH

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

EPSS percentile

Exploit Prediction Scoring System · top 80% of all CVEs

Weaknesses (CWE)

CWE-20Improper Input Validation CWE-918Server-Side Request Forgery (SSRF)

Description

LibreChat is a ChatGPT clone with additional features. Prior to version 0.8.1-rc2, LibreChat is vulnerable to Server-side Request Forgery (SSRF), by passing specially crafted OpenAPI specs to its "Actions" feature and making the LLM use those actions. It could be used by an authenticated user with access to this feature to access URLs only accessible to the LibreChat server (such as cloud metadata services, through which impersonation of the server might be possible). This issue has been patched in version 0.8.1-rc2.

Timeline

Published 2025-11-29

Modified 2026-10-07

External references

NVD MITRE Exploit-DB GitHub PoC trickest/cve VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2025-66201

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Librechat Librechat"

All exposed Librechat Librechat instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Librechat"

HTTP body or banner mentions "Librechat" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2025-66201