Description
Starlette is a lightweight ASGI framework/toolkit. Prior to 1.3.0, the HTTP request path is not validated before being used to reconstruct request.url. Because request.url is rebuilt by concatenating {scheme}://{host}{path} and re-parsing the result, a path that does not begin with / (for example @google.com) moves the authority boundary during re-parsing, so request.url.hostname and request.url.netloc become attacker-controlled. Code that reads request.url.hostname (rather than the Host header or scope) can therefore be misled into trusting an attacker-supplied host. This vulnerability is fixed in 1.3.0.
Severity (CVSS)
| Base score | 3.7 |
|---|---|
| Severity | Low |
| Version | CVSS 3.1 |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N |
| Provided by | CNA |
Weaknesses
- CWE-706 — CWE-706: Use of Incorrectly-Resolved Name or Reference
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Kludex | starlette | < 1.3.0 |
References
- https://github.com/Kludex/starlette/security/advisories/GHSA-jp82-jpqv-5vv3 (x_refsource_CONFIRM)
Generated from the official CVE List on 23 Jun 2026 10:05 UTC.