DEBIAN-CVE-2026-48817
Starlette is a lightweight ASGI framework/toolkit. In versions 1.0.1 and below, when dispatching a request, HTTPEndpoint selects the handler by lowercasing the HTTP method and looking it up as an attribute with getattr, without restricting the lookup to a known set of HTTP verbs. When an HTTPEndpoint subclass is registered through Route(...) without an explicit methods= argument, the route does not constrain the method and every method reaches the endpoint. If a non-standard HTTP method whose lowercased name matches an attribute on the endpoint subclass reaches the endpoint, that attribute is invoked as if it were a request handler. An attacker can use this to reach methods that were never meant to be HTTP handlers, such as internal helpers, without the authorization checks applied by the intended public handler. An application (including Starlette-based frameworks like FastAPI) is affected if it registers an HTTPEndpoint subclass via Route(...) without explicitly setting methods=, and that subclass includes extra methods named like non-standard HTTP verbs that take one request argument and return a response. This issue has been fixed in version 1.1.0.
DEBIAN-CVE-2026-48817
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-48817
starlette
Source reference: /affected/0/package/name
- Affected versions
- 0.26.1-1
Source reference:
/affected/0/versions0.26.1-1+deb12u1Source reference:
/affected/0/versions - Fixed versions
- 0.26.1-1+deb12u2
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
starlette
Source reference: /affected/1/package/name
- Affected versions
- 0.46.1-3
Source reference:
/affected/1/versions0.46.1-3+deb13u1Source reference:
/affected/1/versions0.46.1-3+deb13u2Source reference:
/affected/1/versions - Fixed versions
- 0.46.1-3+deb13u3
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
starlette
Source reference: /affected/2/package/name
- Affected versions
- 0.46.1-3
Source reference:
/affected/2/versions0.50.0-1Source reference:
/affected/2/versions1.0.0-1Source reference:
/affected/2/versions - Fixed versions
- 1.1.0-1
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.26.1-1+deb12u2"
}
]
}
],
"package": {
"name": "starlette",
"purl": "pkg:deb/debian/starlette?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"0.26.1-1",
"0.26.1-1+deb12u1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-48817.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.46.1-3+deb13u3"
}
]
}
],
"package": {
"name": "starlette",
"purl": "pkg:deb/debian/starlette?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"0.46.1-3",
"0.46.1-3+deb13u1",
"0.46.1-3+deb13u2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-48817.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.1.0-1"
}
]
}
],
"package": {
"name": "starlette",
"purl": "pkg:deb/debian/starlette?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"0.46.1-3",
"0.50.0-1",
"1.0.0-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-48817.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #57270 · Revision 1
- Added to Heist Feed
- Publisher date