Allocation of Resources Without Limits or Throttling Affecting aiohttp package, versions [,3.13.4)
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- published2 Apr 2026
- disclosed1 Apr 2026
- creditBekkaze
Introduced: 1 Apr 2026
NewCVE-2026-34516 (opens in a new tab)Common Vulnerabilities and Exposures (CVE) are common identifiers for publicly known security vulnerabilities
Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade aiohttp to version 3.13.4 or higher.
Overview
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in the processing of multipart headers. An attacker can cause excessive memory consumption by sending a response with an unusually large number of multipart headers.