{"id":"DEBIAN-CVE-2026-54283","details":"Starlette is a lightweight ASGI framework/toolkit. From 0.4.1 until 1.3.1, request.form() accepts max_fields and max_part_size to bound resource consumption while parsing form data. These limits are enforced for multipart/form-data, but silently ignored for application/x-www-form-urlencoded. An unauthenticated attacker can therefore send a urlencoded body with an arbitrarily large number of fields or an arbitrarily large field, even when the application configured limits it believed would apply. This vulnerability is fixed in 1.3.1.","modified":"2026-09-01T16:06:50.888110049Z","published":"2026-06-22T18:16:46.943Z","upstream":["CVE-2026-54283"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-54283"}],"affected":[{"package":{"name":"starlette","ecosystem":"Debian:12","purl":"pkg:deb/debian/starlette?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.26.1-1+deb12u2"}]}],"versions":["0.26.1-1","0.26.1-1+deb12u1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54283.json"}},{"package":{"name":"starlette","ecosystem":"Debian:13","purl":"pkg:deb/debian/starlette?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.46.1-3+deb13u3"}]}],"versions":["0.46.1-3","0.46.1-3+deb13u1","0.46.1-3+deb13u2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54283.json"}},{"package":{"name":"starlette","ecosystem":"Debian:14","purl":"pkg:deb/debian/starlette?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.1-1"}]}],"versions":["0.46.1-3","0.50.0-1","1.0.0-1","1.1.0-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54283.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}