CVE-2026-63764 LMDeploy Server-Side Request Forgery via HTTP Redirect Bypass
An unauthenticated attacker can exploit an SSRF vulnerability in LMDeploy to access internal services or cloud metadata via crafted image URLs.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-63764?
CVE-2026-63764 is a high-severity server-side request forgery vulnerability in InternLM lmdeploy, published on 21 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
LMDeploy through 0.14.0, fixed in commit 03c3130, contains a server-side request forgery (SSRF) vulnerability in the _load_http_url function within the connection.py media handler, where the private-IP guard validates only the original URL without re-validating hosts after HTTP redirects. An unauthenticated attacker can submit a crafted image_url to the chat completions endpoint pointing to an attacker-controlled host that returns a redirect to a private IP or cloud-metadata endpoint, causing the server to follow the redirect and expose internal service content through the model pipeline.
Weakness: CWE-918
Which versions are affected by CVE-2026-63764?
It affects 1 product.
Products include Internlm Lmdeploy.
How do I fix CVE-2026-63764?
No fix has been published for CVE-2026-63764 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-63764 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-63764 exists.
Other vulnerabilities in InternLM lmdeploy
- CVE-2025-67729 lmdeploy vulnerable to Arbitrary Code Execution via Insecure Deserialization in torch.load()
- CVE-2026-33626 LMDeploy Vulnerable to Server-Side Request Forgery (SSRF) via Vision-Language Image Loading
- CVE-2025-3162 InternLM LMDeploy PT File utils.py load_weight_ckpt deserialization
- CVE-2025-3163 InternLM LMDeploy conf.py open code injection
Sources
Also known as GHSA-rqhf-rg9p-w5gg.