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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/sgl-project/sglang/security/advisories/GHSA-cpqq-22v3-2wfm	Broken Link
https://thoughts.apoorvdayal.com/posts/sglang-disclosures/	Third Party Advisory Mitigation
https://thoughts.apoorvdayal.com/posts/sglang-disclosures/	Third Party Advisory Mitigation

Configurations

Configuration 1 (hide)

cpe:2.3:a:lmsys:sglang:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-07-30 19:17

Updated : 2026-08-04 20:40

NVD link : CVE-2026-15978

Mitre link : CVE-2026-15978

CVE.ORG link : CVE-2026-15978

JSON object : View

Products Affected

lmsys

sglang

CWE

CWE-306

Missing Authentication for Critical Function

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