CVE-2026-15978CWE-306

CVE-2026-15978

High · published July 30, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
42.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00504 · 42.2th percentile
Weakness
CWE-306 · Missing Authentication for Critical Function
Published
2026-07-30T23:17Z
Affected products (1)
ProductVersionsFixed in
lmsys/sglang≤ 0.5.15—
References (3)
https://github.com/sgl-project/sglang/security/advisories/GHSA-cpqq-22v3-2wfm · [email protected]https://thoughts.apoorvdayal.com/posts/sglang-disclosures/ · [email protected]https://thoughts.apoorvdayal.com/posts/sglang-disclosures/ · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 30 JUL 18:08Z
    CVE-2026-15978
    cvelistv5