AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python.

Code

The project this record applies to. Exploit listings stay in References.

• Repository · github.com

Timeline

Detection, updates, and resolution for this record.

1. Apr 1, 2026 · NIST NVD

   Detected

   AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, a response with an excessive number of multipart headers may be allowed to use more memory than intended, potentially allowing a DoS vulnerability. This issue has been patched in version 3.13.4.

2. Jun 17, 2026 · NIST NVD

   Updated

   AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, a response with an excessive number of multipart headers may be allowed to use more memory than intended, potentially allowing a DoS vulnerability. This issue has been patched in version 3.13.4.

Affected

• cpe aiohttp/aiohttpversion unspecified

Sources

• CVE.orgVulnerability recordCVE-2026-34516

  Official CVE identifier

  cve.org
• NIST NVDVulnerability recordCVE-2026-34516

  AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, a response with an excessive number of multipart headers may be allowed to use more memory than intended, potentially allowing a DoS vulnerability. This issue has been patched

  nvd.nist.gov

References

• Patch · github.com
• Release Notes · github.com
• Patch · github.com