Python

aiohttp

Latest secure version 3.13.5

Async http client/server framework (asyncio)

Apache-2.0 AND MIT

All Versions

Vulnerabilities (Public)

Known vulnerabilities and security issues detected in the extension's dependencies and code.

Vulnerability IDAdvisoryAffected Versions
CVE-2026-34525Affected versions of the aiohttp package are vulnerable to HTTP Request Smuggling due to the acceptance of duplicate Host headers in incoming HTTP requests. The C extension HTTP parser failed to rejec…
Medium
<3.13.4
CVE-2026-34515Affected versions of the aiohttp package are vulnerable to Server-Side Request Forgery (SSRF) and Information Disclosure due to insufficient path validation in the static resource handler on Windows. …
Medium
<=3.13.3
CVE-2026-34516Affected versions of the aiohttp package are vulnerable to Denial of Service due to insufficient size restrictions on multipart headers. Multipart headers were not subject to the same memory limits en…
Medium
<=3.13.3
CVE-2026-22815aiohttp allows unlimited trailer headers, leading to possible uncapped memory usage
Medium
<= 3.13.3
CVE-2026-34517Affected versions of the aiohttp package are vulnerable to Denial of Service due to late enforcement of the client_max_size limit on non-file multipart form fields. When an application uses Request.po…
Low
<=3.13.3
CVE-2026-34518Affected versions of the aiohttp package are vulnerable to Information Disclosure due to improper handling of sensitive headers during cross-origin redirects. When following a redirect to a different …
Low
<=3.13.3
CVE-2026-34514Affected versions of the aiohttp package are vulnerable to CRLF Injection due to insufficient sanitization of the content_type parameter during multipart request header construction. An attacker who c…
Low
<=3.13.3
CVE-2026-34513Affected versions of the aiohttp package are vulnerable to Denial of Service (DoS) due to an unbounded DNS cache in TCPConnector that grows without limit. When an application issues requests to a larg…
Low
<=3.13.3
CVE-2026-34520Affected versions of the aiohttp package are vulnerable to HTTP Response Splitting due to the default C parser (llhttp) accepting null bytes and control characters in response header values. Specifica…
Low
<=3.13.3
CVE-2026-34519Affected versions of the aiohttp package are vulnerable to HTTP Response Splitting due to improper neutralisation of carriage return characters in the reason phrase of HTTP responses. The Response cla…
Low
<=3.13.3
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Safety Discovered Vulnerabilities

Additional security issues found by Safety, exclusive to our platform.

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Vulnerable Functions

Functions linked to known vulnerabilities in this package.

Vulnerable function data is available for Enterprise customers

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