PYSEC-2026-2196
See a problem?- Import Source
- https://github.com/pypa/advisory-database/blob/main/vulns/litestar/PYSEC-2026-2196.yaml
- JSON Data
- https://api.osv.dev/v1/vulns/PYSEC-2026-2196
- Aliases
- Published
- 2026-02-09T20:15:57.177Z
- Modified
- 2026-07-13T07:15:34.259035891Z
- Severity
-
- 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N CVSS Calculator
- Summary
- [none]
- Details
-
Litestar is an Asynchronous Server Gateway Interface (ASGI) framework. Prior to 2.20.0, in litestar.middleware.allowed_hosts, allowlist entries are compiled into regex patterns in a way that allows regex metacharacters to retain special meaning (e.g., . matches any character). This enables a bypass where an attacker supplies a host that matches the regex but is not the intended literal hostname. This vulnerability is fixed in 2.20.0.
- References
Affected packages
PyPI / litestar
Package
- Name
- litestar
- View open source insights on deps.dev
- Purl
- pkg:pypi/litestar
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed2.20.0
Affected versions
1.*
1.0.0a0
2.*
2.0.0a3
2.0.0a4
2.0.0a5
2.0.0a6
2.0.0a7
2.0.0b1
2.0.0b2
2.0.0b3
2.0.0b4
2.0.0rc1
2.0.0
2.0.1
2.1.0
2.1.1
2.2.0
2.2.1
2.3.0
2.3.1
2.3.2
2.4.0
2.4.1
2.4.2
2.4.3
2.4.4
2.4.5
2.5.0
2.5.1
2.5.2
2.5.3
2.5.4
2.5.5
2.6.0
2.6.1
2.6.2
2.6.3
2.6.4
2.7.0
2.7.1
2.7.2
2.8.0
2.8.1
2.8.2
2.8.3
2.9.0
2.9.1
2.10.0
2.11.0
2.12.0
2.12.1
2.13.0
2.14.0
2.15.0
2.15.1
2.15.2
2.16.0
2.17.0
2.18.0
2.19.0