What is CVE-2026-25478?

CVE-2026-25478 is a high-severity vulnerability in Litestar, classified under Permissive Cross-domain Policy with Untrusted Domains. CVSS score: 7.4/10. Published 2026-02-09.

How severe is CVE-2026-25478?

High severity. CVSS v3 base score is 7.4 out of 10.

Vulnerability in Litestar

CVE-2026-25478

Litestar is an Asynchronous Server Gateway Interface (ASGI) framework. Prior to 2.20.0, CORSConfig.allowed_origins_regex is constructed using a regex built from configured allowlist values and used with fullmatch() for validation. Because…

EPSS: 0.004 (30.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N.

Affected products

Litestar
Litestar-org Litestar — versions < 2.20.0

Weakness classification (CWE)

CWE-942 — Permissive Cross-domain Policy with Untrusted Domains

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC, Release Notes)
security-advisories@github.com (x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2026-25478?: CVE-2026-25478 is a high-severity vulnerability in Litestar, classified under Permissive Cross-domain Policy with Untrusted Domains. CVSS score: 7.4/10. Published 2026-02-09.
How severe is CVE-2026-25478?: High severity. CVSS v3 base score is 7.4 out of 10.