CVE-2026-34516
2 advisories.
PyPI/aiohttp CVE-2026-34516: high 7.5, EPSS 0.61%
AIOHTTP has a Multipart Header Size Bypass
Action: Upgrade aiohttp to 3.13.4 or later.
pip install aiohttp==3.13.4Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 3.13.4 | - |
Fixed versions
| 3.13.4 |
Sources
- osv: GHSA-m5qp-6w8w-w647
- https://github.com/aio-libs/aiohttp/security/advisories/GHSA-m5qp-6w8w-w647
- https://nvd.nist.gov/vuln/detail/CVE-2026-34516
- https://github.com/aio-libs/aiohttp/commit/8a74257b3804c9aac0bf644af93070f68f6c5a6f
- https://github.com/aio-libs/aiohttp
- https://github.com/aio-libs/aiohttp/releases/tag/v3.13.4
CVE-2026-34516 · published · modified · JSON
PyPI/aiohttp CVE-2026-34516: unknown, EPSS 0.61%
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
Action: Upgrade aiohttp to 3.13.4 or later.
pip install aiohttp==3.13.4Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 3.13.4 | - |
Fixed versions
| 3.13.4 |
Sources
- osv: PYSEC-2026-2098
- https://github.com/aio-libs/aiohttp/releases/tag/v3.13.4
- https://github.com/aio-libs/aiohttp/commit/8a74257b3804c9aac0bf644af93070f68f6c5a6f
- https://github.com/aio-libs/aiohttp/security/advisories/GHSA-m5qp-6w8w-w647
CVE-2026-34516 · published · modified · JSON