CVE-2026-34519
python-aiohttp: response `reason` parameter can be use to perform header injection (bsc#1261334).
CVE-2026-34519 is fixed in 3 products on 1 platform, first by DEBIAN-CVE-2026-34519, released April 1, 2026. It is not reported as exploited. Patch Radar priority: Routine.
Routine
CVSS
5.3
IMPORTANT
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0030
23rd percentile
response `reason` parameter can be use to perform header injection (bsc#1261334).
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| python-aiohttp · Debian 12.15 (bookworm) | 3.8.4-1+deb12u2 | DEBIAN-CVE-2026-34519 | Apr 1, 2026 |
| python-aiohttp · Debian 14 | 3.13.5-1 | DEBIAN-CVE-2026-34519 | Apr 1, 2026 |
| python-aiohttp · opensuse-leap 16.0 | 3.11.16-160000.5.1 | OPENSUSE-SU-2026:21098-1 | Jun 19, 2026 |
| python-aiohttp · sles 15.6 | 3.9.3-150400.10.43.1 | SUSE-SU-2026:3207-1 | Jul 23, 2026 |
| python-aiohttp · sles 15.7 | 3.9.3-150400.10.43.1 | SUSE-SU-2026:3207-1 | Jul 23, 2026 |
| python-aiohttp · sles 16.0 | 3.11.16-160000.5.1 | SUSE-SU-2026:22173-1 | Jun 19, 2026 |
| python39-oci-sdk · ol 9 | 0:2.187.0-1.0.5.el9 | ELSA-2026-604898 | Nov 7, 2026 |
| python39-oci-sdk-docs · ol 9 | 0:2.187.0-1.0.5.el9 | ELSA-2026-604898 | Nov 7, 2026 |
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