PT-2026-62099 · Internlm · Lmdeploy

George Chen · CVE-2026-63764 · Published 2026-07-21 · Updated 2026-07-21

Mitre

CVSS v3.1

9.3

Critical

Base vector

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

lmdeploy's OpenAI-compatible API server contains a server-side request forgery vulnerability that allows unauthenticated attackers to access internal services and cloud metadata endpoints by supplying a crafted image url that redirects to internal targets. Attackers can send a POST request to the chat completions endpoint with an image url pointing to an attacker-controlled server that responds with an HTTP 302 redirect to internal addresses such as loopback or instance-metadata endpoints, bypassing the initial URL safety check because redirects are followed without re-validating each hop through the safety guard.

Fix

SSRF

Weakness Enumeration

CWE-918

Related Identifiers

CVE-2026-63764

Affected Products

Lmdeploy

References · 4

• https://github.com/InternLM/lmdeploy · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-63764 · Security Note
• https://github.com/InternLM/lmdeploy/issues/4761 · Note
• https://vulncheck.com/advisories/lmdeploy-server-side-request-forgery-via-http-redirect-bypass-of-private-ip-guard-in-vision-image-fetch · Note