CVE-2026-15978

Published: Jul 30, 2026Modified: Aug 4, 2026

7.5

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Exploitability: 3.9 / Impact: 3.6

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

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.

Affected (1)

Products: Lmsys: Sglang

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Lmsys Sglang	Up to 0.5.15

Related CWEs

Missing Authentication for Critical Function

The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.

References (3)

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

Source: cret@cert.org

Broken Link

https://thoughts.apoorvdayal.com/posts/sglang-disclosures/

Source: cret@cert.org

Third Party AdvisoryMitigation

https://thoughts.apoorvdayal.com/posts/sglang-disclosures/

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Third Party AdvisoryMitigation

Timeline

No history available yet.