# SUSE-SU-2026:22173-1: python-aiohttp security update

SUSE-SU-2026:22173-1, released June 19, 2026, fixes 11 CVEs in python-aiohttp (version 3.11.16-160000.5.1). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/suse-su-2026-22173-1
- Platform: Linux
- Released: Jun 19, 2026
- Priority: High (Closes CVE-2026-34513, high severity)
- CVEs: 11, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://osv.dev/vulnerability/SUSE-SU-2026:22173-1

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [python-aiohttp](https://patchblox.com/security/data/product/linux/python-aiohttp.md) | sles 16.0 | 3.11.16-160000.5.1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-34513](https://patchblox.com/security/data/cve/CVE-2026-34513.md) | High | python3-aiohttp: AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python | 7.5 | 0.0046 |  |
| [CVE-2026-34993](https://patchblox.com/security/data/cve/CVE-2026-34993.md) | High | python-aiohttp: loading untrusted input in `CookieJar.load()` can lead to arbitrary code execution (bsc#1267471). | 7.3 | 0.0018 |  |
| [CVE-2026-47265](https://patchblox.com/security/data/cve/CVE-2026-47265.md) | High | python-aiohttp: cookies set with the `cookies` parameter on requests are sent after following a cross-origin redirect | 7.5 | 0.0015 |  |
| [CVE-2026-34520](https://patchblox.com/security/data/cve/CVE-2026-34520.md) | Routine | python-aiohttp: improper character handling by C parser can lead to header injection (bsc#1261335). | 3.7 | 0.0048 |  |
| [CVE-2026-22815](https://patchblox.com/security/data/cve/CVE-2026-22815.md) | Routine | python3-aiohttp: AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python | 5.3 | 0.0046 |  |
| [CVE-2026-34516](https://patchblox.com/security/data/cve/CVE-2026-34516.md) | Routine | python3-aiohttp: AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python | 5.3 | 0.0046 |  |
| [CVE-2026-34517](https://patchblox.com/security/data/cve/CVE-2026-34517.md) | Routine | python-aiohttp: large multipart form fields read into memory without size check can cause a denial of service | 5.3 | 0.0040 |  |
| [CVE-2026-34518](https://patchblox.com/security/data/cve/CVE-2026-34518.md) | Routine | python-aiohttp: retained `Cookie` and `Proxy-Authorization` headers when following redirects can lead to information | 5.3 | 0.0035 |  |
| [CVE-2026-34514](https://patchblox.com/security/data/cve/CVE-2026-34514.md) | Routine | python3-aiohttp: AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python | 5.3 | 0.0033 |  |
| [CVE-2026-34519](https://patchblox.com/security/data/cve/CVE-2026-34519.md) | Routine | python-aiohttp: response `reason` parameter can be use to perform header injection (bsc#1261334). | 5.3 | 0.0030 |  |
| [CVE-2026-34525](https://patchblox.com/security/data/cve/CVE-2026-34525.md) | Routine | python-aiohttp: multiple `Host` headers allow for potential security bypass in proxy servers (bsc#1261343). | 5.4 | 0.0030 |  |

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Data as of 2026-11-11T19:49:26Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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