PyPI/aiohttp CVE-2026-34519: medium 5.3, EPSS 0.29%
AIOHTTP has HTTP response splitting via \r in reason phrase
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-mwh4-6h8g-pg8w
- nvd: CVE-2026-34519
- https://github.com/aio-libs/aiohttp/security/advisories/GHSA-mwh4-6h8g-pg8w
- https://github.com/aio-libs/aiohttp/commit/53b35a2f8869c37a133e60bf1a82a1c01642ba2b
- https://github.com/aio-libs/aiohttp
- https://github.com/aio-libs/aiohttp/releases/tag/v3.13.4
CVE-2026-34519 · published · modified · JSON