CVE-2026-15978
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductLmsys Sglang
PublishedJul 30, 2026
First seenJul 30, 2026
Weakness typeCWE-306Missing authentication for critical function
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| lmsys sglang | v ≤ 0.5.15 | — |
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