CVE-2026-15978

State: Published
Severity: 7.5 High
Published: Jul 30, 2026
Updated: Jul 31, 2026
Reserved: Jul 16, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	CISA-ADP

Weaknesses

CWE-306 Missing Authentication for Critical Function

Affected Products

Product	Versions
SGLangSGLang	v0.5.15 and earlierAffected

References

https://github.com/sgl-project/sglang/security/advisories/GHSA-cpqq-22v3-2wfm
https://thoughts.apoorvdayal.com/posts/sglang-disclosures/

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