What is CVE-2026-15974?

CVE-2026-15974 is a medium-severity vulnerability in Lmsys Sglang, classified under Server-Side Request Forgery (SSRF). CVSS score: 6.5/10. Published 2026-07-30.

How severe is CVE-2026-15974?

Medium severity. CVSS v3 base score is 6.5 out of 10.

SSRF in Lmsys Sglang

CVE-2026-15974

SGLang contains an SSRF and local file read in the multimodal generation endpoint /v1/chat/completions due to unsanitized image_url, allowing access to internal metadata, secrets, and services.

Vulnerability class: SSRF (Server-Side Request Forgery)

EPSS: 0.003 (22.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Lmsys Sglang
Sglang — versions 0

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

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

Frequently asked questions

What is CVE-2026-15974?: CVE-2026-15974 is a medium-severity vulnerability in Lmsys Sglang, classified under Server-Side Request Forgery (SSRF). CVSS score: 6.5/10. Published 2026-07-30.
How severe is CVE-2026-15974?: Medium severity. CVSS v3 base score is 6.5 out of 10.