Allocation of Resources Without Limits or Throttling Affecting starlette package, versions [0.4.1,1.3.1)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-PYTHON-STARLETTE-17342515
- published17 Jun 2026
- disclosed15 Jun 2026
- creditEthan Kim, Z-Bra0, Abdul Moiz, Moaaz, SeongHun Pak, oxqnd
Introduced: 15 Jun 2026
CVE-2026-54283 (opens in a new tab)How to fix?
Upgrade starlette to version 1.3.1 or higher.
Overview
starlette is a The little ASGI library that shines.
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via the request.form. An attacker can exhaust system resources and disrupt service availability by submitting a specially crafted application/x-www-form-urlencoded request containing either an excessive number of fields or a very large field value, leading to event loop blocking or unbounded memory allocation.