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

7.7HIGH

Key Information:

Vendor

Internlm

Status
Lmdeploy
Vendor
CVE Published:
21 July 2026

Badges

👾 Exploit Exists🟡 Public PoC

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 0 <= 0.14.0

lmdeploy 03c313006d17cc3feae86b633c44206a997c44db

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-63764 - Proof of Concept

References

https://github.com/InternLM/lmdeploy/issues/4761
technical-descriptionexploit
https://github.com/InternLM/lmdeploy/pull/4734
issue-tracking
https://github.com/InternLM/lmdeploy/commit/03c313006d17c...
patch

CVSS V4

Score:
7.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

George Chen
.