Server-Side Request Forgery Vulnerability in lmdeploy by InternLM
CVE-2026-63764

9.2CRITICAL

Key Information:

Vendor

Internlm

Status
Lmdeploy
Vendor
CVE Published:
21 July 2026

What is CVE-2026-63764?

The lmdeploy product from InternLM is affected by a server-side request forgery vulnerability that enables unauthenticated attackers to access sensitive internal services. By manipulating the 'image_url' parameter, attackers can redirect requests to targeted internal endpoints, including loopback addresses and cloud metadata services. This redirection is facilitated by the server’s failure to re-validate each redirection, thus bypassing existing safety mechanisms. As a result, attackers can exploit this flaw to extract sensitive data or compromise the integrity of the system.

Affected Version(s)

lmdeploy 648df3b

References

https://github.com/InternLM/lmdeploy/issues/4761
product
https://github.com/InternLM/lmdeploy
patch
https://www.vulncheck.com/advisories/lmdeploy-server-side...
third-party-advisory

CVSS V4

Score:
9.2
Severity:
CRITICAL
Confidentiality:
None
Integrity:
High
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

George Chen
.