PT-2026-66563 · Nvidia+1 · Nccl+1
CVE-2026-15978
·
Published
2026-07-30
·
Updated
2026-08-04
CVSS v3.1
7.5
High
| Vector | AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
Name of the Vulnerable Software and Affected Versions
SGLang (affected versions not specified)
Description
When no API keys are configured, the software exposes two endpoints that allow a remote attacker to trigger distributed weight broadcasting using NCCL (NVIDIA Collective Communications Library, a library for multi-GPU communication) and subsequently trigger data transfer to exfiltrate all model weights.
Recommendations
Configure API keys to restrict access to the endpoints and prevent unauthorized data transfer.
Exploit
Fix
Missing Authentication
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Weakness Enumeration
Related Identifiers
Affected Products
Nccl
Sglang