Description

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, multiple Host headers were allowed in aiohttp. This issue has been patched in version 3.13.4.

INFO

Published Date :

2026-04-01T20:28:46.652Z

Last Modified :

2026-04-02T16:24:11.311Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-34525 vulnerability.

Vendors Products
Aio-libs
  • Aiohttp
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-34525.

URL Resource
https://github.com/aio-libs/aiohttp/commit/53e2e6fc58b89c6185be7820bd2c9f40216b3000 cve-icon cve-icon cve-icon
https://github.com/aio-libs/aiohttp/commit/e00ca3cca92c465c7913c4beb763a72da9ed8349 cve-icon cve-icon cve-icon
https://github.com/aio-libs/aiohttp/releases/tag/v3.13.4 cve-icon cve-icon cve-icon
https://github.com/aio-libs/aiohttp/security/advisories/GHSA-c427-h43c-vf67 cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-34525 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-34525 cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
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SS Confidentiality
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SS Availability
Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact