CVE catalog
CVE-2026-50269
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.0, attacker-controlled input included into multipart/payload headers can be used to modify a request to in
- Severity
- Medium · CVSS 5.9
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.53% · Oct 25, 2026
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.0, attacker-controlled input included into multipart/payload headers can be used to modify a request to inject additional headers or similar. In the unlikely situation that an application is passing user-controlled strings into MultipartWriter.append(headers=...) or Payload.headers, then an attacker may be able to modify the request to inject headers or change the contents of the request. This vulnerability is fixed in 3.14.0.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | python-aiohttp | sid | 3.14.3-1 | fixed |
| Debian | python-aiohttp | forky | 3.14.3-1 | fixed |
| Debian | python-aiohttp | trixie | 3.11.16-1+deb13u1 | vulnerable |
| Debian | python-aiohttp | trixie-security | 3.11.16-1+deb13u1 | vulnerable |
| Debian | python-aiohttp | bookworm | 3.8.4-1+deb12u1 | vulnerable |
| Debian | python-aiohttp | bookworm-security | 3.8.4-1+deb12u1 | vulnerable |
| Cpe | python-aiohttp | Not reported | Not reported | vulnerable |
| Cpe | aiohttp | Not reported | 3.14.0 | fixed |
| PyPI | aiohttp | Not reported | 3.14.0 | fixed |
| Suse | python-aiohttp | linux enterprise server 16.0 | 3.11.16-160000.6.1 | fixed |
| Suse | python-aiohttp | linux enterprise server for sap applications 16.0 | 3.11.16-160000.6.1 | fixed |
| Suse | python-aiohttp | linux enterprise module for public cloud 15 sp4 | 3.6.0-150100.3.38.1 | fixed |
| Suse | python-aiohttp | linux enterprise module for public cloud 15 sp5 | 3.6.0-150100.3.38.1 | fixed |
| Suse | python-aiohttp | linux enterprise module for public cloud 15 sp6 | 3.6.0-150100.3.38.1 | fixed |
| Suse | python-aiohttp | linux enterprise module for public cloud 15 sp7 | 3.6.0-150100.3.38.1 | fixed |
| Opensuse | python-aiohttp | leap 16.0 | 3.11.16-160000.6.1 | fixed |
| Opensuse | python-aiohttp | tumbleweed | 3.14.1-1.1 | fixed |
| Cpe | aiohttp | Not reported | 3.14.0 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | python-aiohttp | source | sid | 3.14.0-1 | not yet assigned | Not reported | Not reported |
| Debian | python-aiohttp | source | forky | 3.14.0-1 | not yet assigned | Not reported | Not reported |
| Debian | python-aiohttp | source | trixie | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | python-aiohttp | source | bookworm | (unfixed) | not yet assigned | Not reported | Not reported |
| Cpe | aiohttp | cpe | Not reported | 3.14.0 | Not reported | Not reported | Not reported |
| PyPI | aiohttp | PyPI | Not reported | 3.14.0 | Not reported | GHSA-M6QW-4CW2-HM4M | Not reported |
| Suse | python-aiohttp | rpm | linux enterprise server 16.0 | 3.11.16-160000.6.1 | Not reported | SUSE-SU-2026:22819-1 | Not reported |
| Suse | python-aiohttp | rpm | linux enterprise server for sap applications 16.0 | 3.11.16-160000.6.1 | Not reported | SUSE-SU-2026:22819-1 | Not reported |
| Suse | python-aiohttp | rpm | linux enterprise module for public cloud 15 sp4 | 3.6.0-150100.3.38.1 | Not reported | SUSE-SU-2026:3208-1 | Not reported |
| Suse | python-aiohttp | rpm | linux enterprise module for public cloud 15 sp5 | 3.6.0-150100.3.38.1 | Not reported | SUSE-SU-2026:3208-1 | Not reported |
| Suse | python-aiohttp | rpm | linux enterprise module for public cloud 15 sp6 | 3.6.0-150100.3.38.1 | Not reported | SUSE-SU-2026:3208-1 | Not reported |
| Suse | python-aiohttp | rpm | linux enterprise module for public cloud 15 sp7 | 3.6.0-150100.3.38.1 | Not reported | SUSE-SU-2026:3208-1 | Not reported |
| Opensuse | python-aiohttp | rpm | leap 16.0 | 3.11.16-160000.6.1 | Not reported | OPENSUSE-SU-2026:21372-1 | Not reported |
| Opensuse | python-aiohttp | rpm | tumbleweed | 3.14.1-1.1 | Not reported | OPENSUSE-SU-2026:11097-1 | Not reported |
| Cpe | aiohttp | cpe | Not reported | 3.14.0 | Not reported | NVD-CVE-2026-50269 | Not reported |
Notes
[trixie] python-aiohttp: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [python3-aiohttp]Affected
Source package: [python-aiohttp]
Details (4)
3.8.4-1+deb12u1· amd64 · bookwormAffected
nvd · python-aiohttp · debian · bookworm; nvd · python-aiohttp · debian · 12
3.8.4-1+deb12u1· arm64 · bookwormAffected
nvd · python-aiohttp · debian · bookworm; nvd · python-aiohttp · debian · 12
3.8.4-1+deb12u1· amd64 · bookworm-securityAffected
nvd · python-aiohttp · debian · bookworm; nvd · python-aiohttp · debian · 12
3.8.4-1+deb12u1· arm64 · bookworm-securityAffected
nvd · python-aiohttp · debian · bookworm; nvd · python-aiohttp · debian · 12
- [python-aiohttp-doc]Affected
Source package: [python-aiohttp]
Details (4)
3.8.4-1+deb12u1· all · bookwormAffected
nvd · python-aiohttp · debian · bookworm; nvd · python-aiohttp · debian · 12
3.8.4-1+deb12u1· all · bookwormAffected
nvd · python-aiohttp · debian · bookworm; nvd · python-aiohttp · debian · 12
3.8.4-1+deb12u1· all · bookworm-securityAffected
nvd · python-aiohttp · debian · bookworm; nvd · python-aiohttp · debian · 12
3.8.4-1+deb12u1· all · bookworm-securityAffected
nvd · python-aiohttp · debian · bookworm; nvd · python-aiohttp · debian · 12
[Debian 13 (Trixie)]
- [python3-aiohttp]Affected
Source package: [python-aiohttp]
Details (4)
3.11.16-1+deb13u1· amd64 · trixieAffected
nvd · python-aiohttp · debian · 13
3.11.16-1+deb13u1· arm64 · trixieAffected
nvd · python-aiohttp · debian · 13
3.11.16-1+deb13u1· amd64 · trixie-securityAffected
nvd · python-aiohttp · debian · 13
3.11.16-1+deb13u1· arm64 · trixie-securityAffected
nvd · python-aiohttp · debian · 13
- [python-aiohttp-doc]Affected
Source package: [python-aiohttp]
Details (4)
3.11.16-1+deb13u1· all · trixieAffected
nvd · python-aiohttp · debian · 13
3.11.16-1+deb13u1· all · trixieAffected
nvd · python-aiohttp · debian · 13
3.11.16-1+deb13u1· all · trixie-securityAffected
nvd · python-aiohttp · debian · 13
3.11.16-1+deb13u1· all · trixie-securityAffected
nvd · python-aiohttp · debian · 13
[openSUSE Tumbleweed]
- [python313-aiohttp]Unknown
Source package: [python-aiohttp]
Details (1)
3.14.3-1.1· x86_64 · tumbleweedUnknown · Fixed:
3.14.1-1.1Version impact unknown
nvd · python-aiohttp · opensuse · tumbleweed
- [python314-aiohttp]Unknown
Source package: [python-aiohttp]
Details (1)
3.14.3-1.1· x86_64 · tumbleweedUnknown · Fixed:
3.14.1-1.1Version impact unknown
nvd · python-aiohttp · opensuse · tumbleweed
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_21372-1.json]
- [https://github.com/aio-libs/aiohttp/commit/bf88077ebb14f4c29924b8e8904cba20c55c28b8]
- [https://github.com/aio-libs/aiohttp/security/advisories/GHSA-m6qw-4cw2-hm4m]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-50269]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-50269]
- [https://osv.dev/vulnerability/GHSA-m6qw-4cw2-hm4m]
- [https://osv.dev/vulnerability/SUSE-SU-2026:22819-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:3208-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:11097-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:21372-1]
- [https://security-tracker.debian.org/tracker/CVE-2026-50269]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-50269.json]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]