CVSS 3.1
6.5 mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:NCVE-2026-25478
Medium (6.5) in litestar litestar. EPSS 0.4% chance of exploitation in the next 30 days. Fixed in litestar 2.20.0.
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 metacharacters are not escaped, a malicious origin can match unexpectedly. The check relies on allowed_origins_regex.fullmatch(origin). This vulnerability is fixed in 2.20.0.
Severity
- EPSS
- 0.4% chance of exploitation in the next 30 days; higher than 38% of CVEs (scores of 2026-10-31)
- CWE
- CWE-942
- Published
- Modified
- Record from
- the NVD, synced
Affected
- litestar:litestar
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-2p2x-hpg8-cqp2 | PyPI | litestar | >=2.19.0 <2.20.0 | 2.20.0 |
| PYSEC-2026-2195 | PyPI | litestar | <2.20.0 | 2.20.0 |