CVE•Published 2026-06-25•Modified 2026-06-29•1 article on news•4 live references•NVD data
CVE-2026-54030Librechat · Librechat
Vulnerability data via NVD (ingested)
CVSS v3.1
8.0
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N
EPSS percentile
1
Exploit Prediction Scoring System · top 99% of all CVEs
Weaknesses (CWE)
Description
LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.5, LibreChat's MCP OAuth implementation does not validate that the resource parameter from OAuth Protected Resource metadata (RFC 9728) matches the configured MCP server URL, allowing a malicious MCP server to steal access tokens intended for a legitimate server. This vulnerability is fixed in 0.8.5.
Timeline
Published 2026-06-25
Modified 2026-06-29
External references
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-2026-54030Hosts 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-2026-54030Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-54030Censys host search filtered to this CVE id.
grep.app
CVE-2026-54030Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-54030GitHub code search for direct mentions.
Google dork
"CVE-2026-54030" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.