What is CVE-2026-15977?

CVE-2026-15977 is a high-severity vulnerability in Lmsys Sglang, classified under Insufficiently Protected Credentials. CVSS score: 7.5/10. Published 2026-07-30.

How severe is CVE-2026-15977?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Lmsys Sglang

CVE-2026-15977

SGLang contains a credential leakage vulnerability in the /server_info endpoint, which will return API keys and SSL keyfile information when only the --admin-api-key is configured.

EPSS: 0.003 (27.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Lmsys Sglang
Sglang — versions 0

Weakness classification (CWE)

CWE-522 — Insufficiently Protected Credentials

References

cret@cert.org (Broken Link)
cret@cert.org (Third Party Advisory, Mitigation)

Frequently asked questions

What is CVE-2026-15977?: CVE-2026-15977 is a high-severity vulnerability in Lmsys Sglang, classified under Insufficiently Protected Credentials. CVSS score: 7.5/10. Published 2026-07-30.
How severe is CVE-2026-15977?: High severity. CVSS v3 base score is 7.5 out of 10.