VDB
DEBIAN-CVE-2026-34520
DEBIAN-CVE-2026-34520
PUBLISHED
CVSS 2.700000047683716 LOW
Record from OSV · Published April 1, 2026
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, the C parser (the default for most installs) accepted null bytes and control characters in response headers. This issue has been patched in version 3.13.4.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| python-aiohttp | Debian:14 | 3.13.5-1 |
Risk scores
CVSS 4.0
2.700000047683716
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Debian:13 | python-aiohttp | 0, 3.11.16-1, 3.11.16-1+deb13u1 |
| Debian:12 | python-aiohttp | 3.9.5-1, 3.14.1-4, 3.14.1-5 |
| Debian:14 | python-aiohttp | 3.11.16-1, 3.12.15-1, 3.13.0-1 |
Timeline
- Apr 1, 2026 CVE Published
- Oct 27, 2026 CVE Updated
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