7.5
High
CVE-2026-54283 Starlette is a lightweight ASGI framework/toolkit
Description
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| starlette 0.4 | 0.4.1 → < 1.3.1 | 1.3.1 |
References
- github.com github.com
Timeline
- Published
- Last modified
Other CVEs of starlette
The 6 CVEs of starlette →
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CVE-2026-48710
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