CVE-2026-119706

Critical

Description

InternLM LMDeploy 0.9.0 through 0.18.0 contains an unauthenticated remote code execution vulnerability that allows remote attackers to run OS commands by sending pickled data to the /update_weights endpoint. Attackers can submit a base64-encoded crafted pickle in serialized_named_tensors, which ForkingPickler.loads deserializes without validation, executing commands as the api_server process.

SeverityCritical

CVSS9.8

Exploit probability—

ProductInternlm Lmdeploy

PublishedOct 30, 2026

First seenNov 4, 2026

Weakness typeCWE-502Deserialization of untrusted data

How to fix

Patches

github.com/InternLM/lmdeploy/pull/4964

Affected products

Product	Affected versions	Fixed in
InternLM lmdeploy	0.9.0 ≤ v ≤ 0.18.0	—

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