{"id":"CVE-2024-47874","aliases":["CLSA-2025-1757031156","CLSA-2026-1787300457","CLSA-2026-1789447406","DEBIAN-CVE-2024-47874","EUVD-2024-3029","GHSA-f96h-pmfr-66vw","PYSEC-2026-1943","ROOT-APP-PYPI-CVE-2024-47874","SUSE-SU-2024:3719-1","UBUNTU-CVE-2024-47874","openSUSE-SU-2024:14417-1","openSUSE-SU-2026:11626-1"],"status":"published","title":"Starlette Denial of service (DoS) via multipart/form-data","description":"Starlette is an Asynchronous Server Gateway Interface (ASGI) framework/toolkit. Prior to version 0.40.0, Starlette treats `multipart/form-data` parts without a `filename` as text form fields and buffers those in byte strings with no size limit. This allows an attacker to upload arbitrary large form fields and cause Starlette to both slow down significantly due to excessive memory allocations and copy operations, and also consume more and more memory until the server starts swapping and grinds to a halt, or the OS terminates the server process with an OOM error. Uploading multiple such requests in parallel may be enough to render a service practically unusable, even if reasonable request size limits are enforced by a reverse proxy in front of Starlette. This Denial of service (DoS) vulnerability affects all applications built with Starlette (or FastAPI) accepting form requests. Verison 0.40.0 fixes this issue.","severity":{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00653,"percentile":0.5164,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-770"],"published":"2024-10-15T15:45:03Z","modified":"2026-11-10T19:58:19Z","fixes":[{"ecosystem":"PyPI","package":"starlette","fixed_in":["0.40.0"],"sources":["ghsa","osv"]},{"ecosystem":"TuxCare:PyPI","package":"starlette","fixed_in":["0.27.0.post1+tuxcare"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"starlette","fixed_in":["0.26.1-1+deb12u1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"starlette","fixed_in":["0.41.0-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"starlette","fixed_in":["0.41.0-1"],"sources":["osv"]},{"ecosystem":"Root:PyPI","package":"starlette","fixed_in":["0.27.0+aikido.11","0.22.0+aikido.7","0.22.0+aikido.3","0.36.3+aikido.3","0.22.0+aikido.5","0.22.0+aikido.6","0.27.0+aikido.10"],"sources":["osv"]},{"ecosystem":"Root:PyPI","package":"rootio-starlette","fixed_in":["0.22.0+aikido.4"],"sources":["osv"]},{"ecosystem":"openSUSE:Leap 15.6","package":"python-starlette","fixed_in":["0.35.1-150600.3.3.1"],"sources":["osv"]},{"ecosystem":"openSUSE:Tumbleweed","package":"python-starlette","fixed_in":["0.41.0-1.1","1.6.0-1.1"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"PyPI","package":"starlette","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.40.0"}]}]},{"source":"osv","ecosystem":"TuxCare:PyPI","package":"starlette","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0.27.0"},{"fixed":"0.27.0.post1+tuxcare"}]}],"versions":["0.27.0"]},{"source":"osv","ecosystem":"TuxCare:PyPI","package":"starlette","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0.13.6"},{"fixed":"0.13.6.post4+tuxcare"}]}],"versions":["0.13.6","0.13.6.post1+tuxcare","0.13.6.post2+tuxcare","0.13.6.post3+tuxcare"],"bundled":2},{"source":"osv","ecosystem":"TuxCare:PyPI","package":"starlette","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0.25.0"},{"fixed":"0.25.0.post1+tuxcare"}]}],"versions":["0.25.0"],"bundled":8},{"source":"osv","ecosystem":"Debian:12","package":"starlette","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.26.1-1+deb12u1"}]}],"versions":["0.26.1-1"]},{"source":"osv","ecosystem":"Debian:13","package":"starlette","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.41.0-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"starlette","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.41.0-1"}]}]},{"source":"osv","ecosystem":"PyPI","package":"starlette","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.40.0"}]}],"versions":["0.1.0","0.1.1","0.1.10","0.1.11","0.1.12","0.1.13","0.1.14","0.1.15","0.1.16","0.1.17","0.1.2","0.1.3","0.1.4","0.1.5","0.1.6","0.1.7","0.1.8","0.1.9","0.10.0","0.10.1","0.10.2","0.10.3","0.10.4","0.10.5","0.10.6","0.10.7","0.11.0","0.11.1","0.11.2","0.11.3","0.11.4","0.12.0","0.12.0b1","0.12.0b2","0.12.0b3","0.12.1","0.12.10","0.12.11","0.12.12","0.12.13","0.12.2","0.12.3","0.12.4","0.12.5","0.12.6","0.12.7","0.12.8","0.12.9","0.13.0","0.13.1","0.13.2","0.13.3","0.13.4","0.13.5","0.13.6","0.13.7","0.13.8","0.14.0","0.14.1","0.14.2","0.15.0","0.16.0","0.17.0","0.17.1","0.18.0","0.19.0","0.19.1","0.2.0","0.2.1","0.2.2","0.2.3","0.20.0","0.20.1","0.20.2","0.20.3","0.20.4","0.21.0","0.22.0","0.23.0","0.23.1","0.24.0","0.25.0","0.26.0","0.26.0.post1","0.26.1","0.27.0","0.28.0","0.29.0","0.3.0","0.3.1","0.3.2","0.3.3","0.3.4","0.3.5","0.3.6","0.3.7","0.30.0","0.31.0","0.31.1","0.32.0","0.32.0.post1","0.33.0","0.34.0","0.35.0","0.35.1","0.36.0","0.36.1","0.36.2","0.36.3","0.37.0","0.37.1","0.37.2","0.38.0","0.38.1","0.38.2","0.38.3","0.38.4","0.38.5","0.38.6","0.39.0","0.39.1","0.39.2","0.4.0","0.4.1","0.4.2","0.5.0","0.5.1","0.5.2","0.5.3","0.5.4","0.5.5","0.6.0","0.6.1","0.6.2","0.6.3","0.7.0","0.7.1","0.7.2","0.7.3","0.7.4","0.8.0","0.8.1","0.8.2","0.8.3","0.8.4","0.8.5","0.8.6","0.8.7","0.8.8","0.9.0","0.9.1","0.9.10","0.9.11","0.9.2","0.9.3","0.9.4","0.9.5","0.9.6","0.9.7","0.9.8","0.9.9"]},{"source":"osv","ecosystem":"PyPI","package":"starlette","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.40.0"}]}],"versions":["0.1.0","0.1.1","0.1.10","0.1.11","0.1.12","0.1.13","0.1.14","0.1.15","0.1.16","0.1.17","0.1.2","0.1.3","0.1.4","0.1.5","0.1.6","0.1.7","0.1.8","0.1.9","0.10.0","0.10.1","0.10.2","0.10.3","0.10.4","0.10.5","0.10.6","0.10.7","0.11.0","0.11.1","0.11.2","0.11.3","0.11.4","0.12.0","0.12.0b1","0.12.0b2","0.12.0b3","0.12.1","0.12.10","0.12.11","0.12.12","0.12.13","0.12.2","0.12.3","0.12.4","0.12.5","0.12.6","0.12.7","0.12.8","0.12.9","0.13.0","0.13.1","0.13.2","0.13.3","0.13.4","0.13.5","0.13.6","0.13.7","0.13.8","0.14.0","0.14.1","0.14.2","0.15.0","0.16.0","0.17.0","0.17.1","0.18.0","0.19.0","0.19.1","0.2.0","0.2.1","0.2.2","0.2.3","0.20.0","0.20.1","0.20.2","0.20.3","0.20.4","0.21.0","0.22.0","0.23.0","0.23.1","0.24.0","0.25.0","0.26.0","0.26.0.post1","0.26.1","0.27.0","0.28.0","0.29.0","0.3.0","0.3.1","0.3.2","0.3.3","0.3.4","0.3.5","0.3.6","0.3.7","0.30.0","0.31.0","0.31.1","0.32.0","0.32.0.post1","0.33.0","0.34.0","0.35.0","0.35.1","0.36.0","0.36.1","0.36.2","0.36.3","0.37.0","0.37.1","0.37.2","0.38.0","0.38.1","0.38.2","0.38.3","0.38.4","0.38.5","0.38.6","0.39.0","0.39.1","0.39.2","0.4.0","0.4.1","0.4.2","0.5.0","0.5.1","0.5.2","0.5.3","0.5.4","0.5.5","0.6.0","0.6.1","0.6.2","0.6.3","0.7.0","0.7.1","0.7.2","0.7.3","0.7.4","0.8.0","0.8.1","0.8.2","0.8.3","0.8.4","0.8.5","0.8.6","0.8.7","0.8.8","0.9.0","0.9.1","0.9.10","0.9.11","0.9.2","0.9.3","0.9.4","0.9.5","0.9.6","0.9.7","0.9.8","0.9.9"]},{"source":"osv","ecosystem":"Root:PyPI","package":"starlette","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.27.0+aikido.11"},{"fixed":"0.22.0+aikido.7"},{"fixed":"0.22.0+aikido.3"},{"fixed":"0.36.3+aikido.3"},{"fixed":"0.22.0+aikido.5"},{"fixed":"0.22.0+aikido.6"},{"fixed":"0.27.0+aikido.10"}]}]},{"source":"osv","ecosystem":"Root:PyPI","package":"rootio-starlette","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.22.0+aikido.4"}]}]},{"source":"osv","ecosystem":"openSUSE:Leap 15.6","package":"python-starlette","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.35.1-150600.3.3.1"}]}]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"starlette","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.14.1-1","0.16.0-1","0.18.0-1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"starlette","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.30.0-1","0.31.1-1"]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"python-starlette","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.41.0-1.1"}]}]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"python-starlette","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.0-1.1"}]}]}],"products":[{"vendor":"encode","product":"starlette"}],"references":[{"url":"https://github.com/encode/starlette/security/advisories/GHSA-f96h-pmfr-66vw","tags":["x_refsource_CONFIRM","advisory","web","report"]},{"url":"https://github.com/encode/starlette/commit/fd038f3070c302bff17ef7d173dbb0b007617733","tags":["x_refsource_MISC","fix","web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-47874","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-f96h-pmfr-66vw","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/47xxx/CVE-2024-47874.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2024-47874","tags":["advisory"]},{"url":"https://github.com/encode/starlette","tags":["package"]},{"url":"https://pypi.org/project/starlette","tags":["package"]},{"url":"https://www.suse.com/support/update/announcement/2024/suse-su-20243719-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1231689","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2024-47874","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2024-47874","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2024-47874","tags":["report"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/ITQAANLVA7RFTKABILTYM4X6WZF4U52R/","tags":["advisory"]},{"url":"","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2024-47874","title":"Starlette Denial of service (DoS) via multipart/form-data","description":"Starlette is an Asynchronous Server Gateway Interface (ASGI) framework/toolkit. Prior to version 0.40.0, Starlette treats `multipart/form-data` parts without a `filename` as text form fields and buffers those in byte strings with no size limit. This allows an attacker to upload arbitrary large form fields and cause Starlette to both slow down significantly due to excessive memory allocations and copy operations, and also consume more and more memory until the server starts swapping and grinds to a halt, or the OS terminates the server process with an OOM error. Uploading multiple such requests in parallel may be enough to render a service practically unusable, even if reasonable request size limits are enforced by a reverse proxy in front of Starlette. This Denial of service (DoS) vulnerability affects all applications built with Starlette (or FastAPI) accepting form requests. Verison 0.40.0 fixes this issue.","status":"published","published":"2024-10-15T15:45:03.555Z","modified":"2024-11-21T16:53:01.345Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:33:57.302325Z"}],"euvd":[{"id":"EUVD-2024-3029","description":"Starlette is an Asynchronous Server Gateway Interface (ASGI) framework/toolkit. Prior to version 0.40.0, Starlette treats `multipart/form-data` parts without a `filename` as text form fields and buffers those in byte strings with no size limit. This allows an attacker to upload arbitrary large form fields and cause Starlette to both slow down significantly due to excessive memory allocations and copy operations, and also consume more and more memory until the server starts swapping and grinds to a halt, or the OS terminates the server process with an OOM error. Uploading multiple such requests in parallel may be enough to render a service practically unusable, even if reasonable request size limits are enforced by a reverse proxy in front of Starlette. This Denial of service (DoS) vulnerability affects all applications built with Starlette (or FastAPI) accepting form requests. Verison 0.40.0 fixes this issue.","status":"published","published":"2024-10-15T15:45:03Z","modified":"2024-11-21T16:53:01Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-03T00:04:52.521149Z"}],"ghsa":[{"id":"GHSA-f96h-pmfr-66vw","title":"Starlette Denial of service (DoS) via multipart/form-data","description":"### Summary\nStarlette treats `multipart/form-data` parts without a `filename` as text form fields and buffers those in byte strings with no size limit. This allows an attacker to upload arbitrary large form fields and cause Starlette to both slow down significantly due to excessive memory allocations and copy operations, and also consume more and more memory until the server starts swapping and grinds to a halt, or the OS terminates the server process with an OOM error. Uploading multiple such requests in parallel may be enough to render a service practically unusable, even if reasonable request size limits are enforced by a reverse proxy in front of Starlette.\n\n### PoC\n\n```python\nfrom starlette.applications import Starlette\nfrom starlette.routing import Route\n\nasync def poc(request):\n    async with request.form():\n        pass\n\napp = Starlette(routes=[\n    Route('/', poc, methods=[\"POST\"]),\n])\n```\n\n```sh\ncurl http://localhost:8000 -F 'big=\u003c/dev/urandom'\n```\n\n### Impact\nThis Denial of service (DoS) vulnerability affects all applications built with Starlette (or FastAPI) accepting form requests.\n","status":"published","published":"2024-10-15T18:12:57Z","modified":"2024-10-15T19:56:07Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"},{"version":"3.1","score":0,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N","level":"none"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:38:10.696798Z"}],"nvd":[{"id":"CVE-2024-47874","description":"Starlette is an Asynchronous Server Gateway Interface (ASGI) framework/toolkit. Prior to version 0.40.0, Starlette treats `multipart/form-data` parts without a `filename` as text form fields and buffers those in byte strings with no size limit. This allows an attacker to upload arbitrary large form fields and cause Starlette to both slow down significantly due to excessive memory allocations and copy operations, and also consume more and more memory until the server starts swapping and grinds to a halt, or the OS terminates the server process with an OOM error. Uploading multiple such requests in parallel may be enough to render a service practically unusable, even if reasonable request size limits are enforced by a reverse proxy in front of Starlette. This Denial of service (DoS) vulnerability affects all applications built with Starlette (or FastAPI) accepting form requests. Verison 0.40.0 fixes this issue.","status":"published","published":"2024-10-15T16:15:05.26Z","modified":"2026-06-17T07:57:53.817Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:10:31.879321Z"}],"osv":[{"id":"CVE-2024-47874","title":"Starlette Denial of service (DoS) via multipart/form-data","description":"Starlette is an Asynchronous Server Gateway Interface (ASGI) framework/toolkit. Prior to version 0.40.0, Starlette treats `multipart/form-data` parts without a `filename` as text form fields and buffers those in byte strings with no size limit. This allows an attacker to upload arbitrary large form fields and cause Starlette to both slow down significantly due to excessive memory allocations and copy operations, and also consume more and more memory until the server starts swapping and grinds to a halt, or the OS terminates the server process with an OOM error. Uploading multiple such requests in parallel may be enough to render a service practically unusable, even if reasonable request size limits are enforced by a reverse proxy in front of Starlette. This Denial of service (DoS) vulnerability affects all applications built with Starlette (or FastAPI) accepting form requests. Verison 0.40.0 fixes this issue.","status":"published","published":"2024-10-15T15:45:03.555Z","modified":"2026-10-28T02:30:26.273913228Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T15:44:43.253252Z"},{"id":"DEBIAN-CVE-2024-47874","description":"Starlette is an Asynchronous Server Gateway Interface (ASGI) framework/toolkit. Prior to version 0.40.0, Starlette treats `multipart/form-data` parts without a `filename` as text form fields and buffers those in byte strings with no size limit. This allows an attacker to upload arbitrary large form fields and cause Starlette to both slow down significantly due to excessive memory allocations and copy operations, and also consume more and more memory until the server starts swapping and grinds to a halt, or the OS terminates the server process with an OOM error. Uploading multiple such requests in parallel may be enough to render a service practically unusable, even if reasonable request size limits are enforced by a reverse proxy in front of Starlette. This Denial of service (DoS) vulnerability affects all applications built with Starlette (or FastAPI) accepting form requests. Verison 0.40.0 fixes this issue.","status":"published","published":"2024-10-15T16:15:05.26Z","modified":"2026-11-02T12:02:53.378059786Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"}],"updated_at":"2026-11-02T15:45:43.798789Z"},{"id":"GHSA-f96h-pmfr-66vw","title":"Starlette Denial of service (DoS) via multipart/form-data","description":"### Summary\nStarlette treats `multipart/form-data` parts without a `filename` as text form fields and buffers those in byte strings with no size limit. This allows an attacker to upload arbitrary large form fields and cause Starlette to both slow down significantly due to excessive memory allocations and copy operations, and also consume more and more memory until the server starts swapping and grinds to a halt, or the OS terminates the server process with an OOM error. Uploading multiple such requests in parallel may be enough to render a service practically unusable, even if reasonable request size limits are enforced by a reverse proxy in front of Starlette.\n\n### PoC\n\n```python\nfrom starlette.applications import Starlette\nfrom starlette.routing import Route\n\nasync def poc(request):\n    async with request.form():\n        pass\n\napp = Starlette(routes=[\n    Route('/', poc, methods=[\"POST\"]),\n])\n```\n\n```sh\ncurl http://localhost:8000 -F 'big=\u003c/dev/urandom'\n```\n\n### Impact\nThis Denial of service (DoS) vulnerability affects all applications built with Starlette (or FastAPI) accepting form requests.\n","status":"published","published":"2024-10-15T18:12:57Z","modified":"2026-09-10T03:50:19.756287586Z","cvss":[{"version":"3.1","score":0,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N","level":"none"},{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T15:46:46.006631Z"},{"id":"PYSEC-2026-1943","title":"Starlette Denial of service (DoS) via multipart/form-data","description":"### Summary\nStarlette treats `multipart/form-data` parts without a `filename` as text form fields and buffers those in byte strings with no size limit. This allows an attacker to upload arbitrary large form fields and cause Starlette to both slow down significantly due to excessive memory allocations and copy operations, and also consume more and more memory until the server starts swapping and grinds to a halt, or the OS terminates the server process with an OOM error. Uploading multiple such requests in parallel may be enough to render a service practically unusable, even if reasonable request size limits are enforced by a reverse proxy in front of Starlette.\n\n### PoC\n\n```python\nfrom starlette.applications import Starlette\nfrom starlette.routing import Route\n\nasync def poc(request):\n    async with request.form():\n        pass\n\napp = Starlette(routes=[\n    Route('/', poc, methods=[\"POST\"]),\n])\n```\n\n```sh\ncurl http://localhost:8000 -F 'big=\u003c/dev/urandom'\n```\n\n### Impact\nThis Denial of service (DoS) vulnerability affects all applications built with Starlette (or FastAPI) accepting form requests.\n","status":"published","published":"2026-07-07T14:34:43.184287Z","modified":"2026-07-07T17:47:58.815486711Z","cvss":[{"version":"3.1","score":0,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N","level":"none"},{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T15:52:55.537808Z"},{"id":"ROOT-APP-PYPI-CVE-2024-47874","title":"CVE-2024-47874 in starlette - Patched by Root","description":"Root has patched CVE-2024-47874 in the starlette package for Root:PyPI. Multiple fixed versions available.","status":"published","published":"2026-09-14T10:42:48Z","modified":"2026-09-14T11:15:04.18846259Z","cvss":[{"version":"3.1","score":0,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N","level":"none"}],"updated_at":"2026-11-02T15:53:27.940619Z"},{"id":"UBUNTU-CVE-2024-47874","description":"Starlette is an Asynchronous Server Gateway Interface (ASGI) framework/toolkit. Prior to version 0.40.0, Starlette treats `multipart/form-data` parts without a `filename` as text form fields and buffers those in byte strings with no size limit. This allows an attacker to upload arbitrary large form fields and cause Starlette to both slow down significantly due to excessive memory allocations and copy operations, and also consume more and more memory until the server starts swapping and grinds to a halt, or the OS terminates the server process with an OOM error. Uploading multiple such requests in parallel may be enough to render a service practically unusable, even if reasonable request size limits are enforced by a reverse proxy in front of Starlette. This Denial of service (DoS) vulnerability affects all applications built with Starlette (or FastAPI) accepting form requests. Verison 0.40.0 fixes this issue.","status":"published","published":"2024-10-15T16:15:00Z","modified":"2025-09-08T17:03:55Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T16:55:06.818511Z"},{"id":"CLSA-2025-1757031156","title":"TuxCare security update for starlette (1 CVE)","description":"TuxCare rebuilt starlette to address 1 CVE. Fixed in 0.27.0.post1+tuxcare.","status":"published","published":"2026-08-04T14:52:09Z","modified":"2026-10-15T09:48:00.84638737Z","updated_at":"2026-11-02T15:43:42.025438Z"},{"id":"CLSA-2026-1787300457","title":"TuxCare security update for starlette (2 CVEs)","description":"TuxCare rebuilt starlette to address 2 CVEs. Fixed in 0.13.6.post4+tuxcare.","status":"published","published":"2026-08-21T08:20:57Z","modified":"2026-11-10T19:58:19.059978303Z","updated_at":"2026-11-10T20:07:30.871041Z"},{"id":"CLSA-2026-1789447406","title":"TuxCare security update for starlette (8 CVEs)","description":"TuxCare rebuilt starlette to address 8 CVEs. Fixed in 0.25.0.post1+tuxcare.","status":"published","published":"2026-09-15T04:43:26Z","modified":"2026-10-15T09:48:01.789333066Z","updated_at":"2026-11-02T15:43:47.938828Z"},{"id":"openSUSE-SU-2024:14417-1","title":"python310-starlette-0.41.0-1.1 on GA media","description":"These are all security issues fixed in the python310-starlette-0.41.0-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-10-20T00:00:00Z","modified":"2026-02-04T02:57:18.69383Z","updated_at":"2026-11-02T16:58:36.976155Z"},{"id":"openSUSE-SU-2026:11626-1","title":"python313-starlette-1.6.0-1.1 on GA media","description":"These are all security issues fixed in the python313-starlette-1.6.0-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-08-27T00:00:00Z","modified":"2026-08-28T18:23:08.880633013Z","updated_at":"2026-11-02T16:58:39.516824Z"},{"id":"SUSE-SU-2024:3719-1","title":"Security update for python-starlette","description":"This update for python-starlette fixes the following issues:\n\n- CVE-2024-47874: Fixed possible DoS via parts size in multipart/form-data requests (bsc#1231689)\n","status":"published","published":"2024-10-18T05:54:46Z","modified":"2026-02-04T03:27:47.615969Z","updated_at":"2026-11-02T15:53:55.639015Z"}]}}