Lmsys Sglang vulnerabilities

CVE-2026-15978 High · 7.5 CWE-306 Jul 30, 2026

CVE-2026-15978

SGLang contains a model weight exfiltration vulnerability when no API keys are configured, as SGLang will expose two endpoints that allow a remote attacker to trigger distributed weight broadcasting using NCCL and then triggering data transfer, attackers can exfiltrate all model weights.

CVE-2026-15977 High · 7.5 CWE-522 Jul 30, 2026

CVE-2026-15977

SGLang contains a credential leakage vulnerability in the /server_info endpoint, which will return API keys and SSL keyfile information when only the --admin-api-key is configured.

CVE-2026-15976 Critical · 9.8 CWE-502 Jul 30, 2026

CVE-2026-15976

SGLang contains a RCE vulnerability when attempting to load model weights from a HuggingFace repository, specifically within the /update_weights_from_disk, where torch.load(..., weights_only=False) fallback enables pickle deserialization of .bin files.

CVE-2026-15974 Medium · 6.5 CWE-918 Jul 30, 2026

CVE-2026-15974

SGLang contains an SSRF and local file read in the multimodal generation endpoint /v1/chat/completions due to unsanitized image_url, allowing access to internal metadata, secrets, and services.

CVE-2026-15971 Critical · 9.8 CWE-95 Jul 30, 2026

CVE-2026-15971

SGLang contains an RCE vulnerability when the optional dumper subsystem is enabled, allowing for a sandbox escape when DUMPER_SERVER_PORT is set, enabling code execution on inference requests.

CVE-2026-15969 Critical · 9.8 CWE-502 Jul 30, 2026

CVE-2026-15969

SGLang contains an unauthenticated RCE in /load_lora_adapter_from_tensors via bypass of SafeUnpickler’s incomplete denylist, allowing arbitrary command execution through crafted base64-encoded pickle payloads.

CVE-2026-14890 Critical · 9.1 CWE-502 Jul 16, 2026

CVE-2026-14890

SGLang uses an expert-parallel backup subsystem that exposes a ZeroMQ PULL socket on a routable network interface that does not contain authentication or deserialization safeguards, allowing an attacker to provide a malicious pickle file that results in unauthenticated remote code execution when the feature is enabled and the service is reachable over the network.

CVE-2026-10775 Medium · 5.3 CWE-404 Jun 3, 2026

sgl-project SGLang Cache data_hash denial of service

A vulnerability was determined in sgl-project SGLang up to 0.5.11. Affected by this vulnerability is the function data_hash of the component Cache Handler. This manipulation causes denial of service. The attack is restricted to local execution. A high degree of complexity is needed for the attack. The exploitation appears to be difficult. The exploit has been publicly disclosed and may be utilized. The pull request to fix this issue awaits acceptance.

CVE-2026-7304 Critical · 9.8 CWE-502 May 18, 2026

CVE-2026-7304

SGLangs multimodal generation runtime is vulnerable to unauthenticated remote code execution when the --enable-custom-logit-processor option is enabled, as Python objects loaded via dill.loads() will be deserialized without validation.

CVE-2026-7302 Critical · 9.1 CWE-35 May 18, 2026

CVE-2026-7302

SGLangs multimodal generation runtime is vulnerable to an unauthenticated path traversal vulnerability, allowing an attacker to write arbitrary files anywhere the server process has write access, by including ../ sequences in the upload filename when sent to specific endpoints.

CVE-2026-7301 Critical · 9.8 CWE-502 May 18, 2026

CVE-2026-7301

SGLangs multimodal generation runtime scheduler's ROUTER socket binds to 0.0.0.0 by default and contains a sink that calls pickle.loads() on incoming messages, enabling RCE when exposed to the internet.

CVE-2026-5760 Critical · 9.8 CWE-94 Apr 20, 2026

CVE-2026-5760

SGLang's reranking endpoint (/v1/rerank) achieves Remote Code Execution (RCE) when a model file containing a malcious tokenizer.chat_template is loaded, as the Jinja2 chat templates are rendered using an unsandboxed jinja2.Environment().

CVE-2026-3989 High · 7.8 CWE-502 Mar 12, 2026

CVE-2026-3989

SGLangs `replay_request_dump.py` contains an insecure pickle.load() without validation and proper deserialization. An attacker can take advantage of this by providing a malicious .pkl file, which will execute the attackers code on the device running the script.

CVE-2026-3060 Critical · 9.8 CWE-502 Mar 12, 2026

CVE-2026-3060

SGLang' encoder parallel disaggregation system is vulnerable to unauthenticated remote code execution through the disaggregation module, which deserializes untrusted data using pickle.loads() without authentication.

CVE-2026-3059 Critical · 9.8 CWE-502 Mar 12, 2026

CVE-2026-3059

SGLang's multimodal generation module is vulnerable to unauthenticated remote code execution through the ZMQ broker, which deserializes untrusted data using pickle.loads() without authentication.