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SUSE alert SUSE-SU-2026:22173-1 (python-aiohttp)



From:
              SLE-SECURITY-UPDATES <null@suse.de>


To:
              sle-security-updates@lists.suse.com


Subject:
              SUSE-SU-2026:22173-1: important: Security update for python-aiohttp


Date:
              Tue, 23 Jun 2026 16:40:21 -0000


Message-ID:
              <178223282195.221.13358892156994399224@f1988df5aa67>


# Security update for python-aiohttp

Announcement ID: SUSE-SU-2026:22173-1  
Release Date: 2026-06-19T08:00:07Z  
Rating: important  
References:

  * bsc#1261320
  * bsc#1261321
  * bsc#1261322
  * bsc#1261329
  * bsc#1261331
  * bsc#1261332
  * bsc#1261334
  * bsc#1261335
  * bsc#1261343
  * bsc#1267471
  * bsc#1267561

  
Cross-References:

  * CVE-2026-22815
  * CVE-2026-34513
  * CVE-2026-34514
  * CVE-2026-34516
  * CVE-2026-34517
  * CVE-2026-34518
  * CVE-2026-34519
  * CVE-2026-34520
  * CVE-2026-34525
  * CVE-2026-34993
  * CVE-2026-47265

  
CVSS scores:

  * CVE-2026-22815 ( SUSE ):  6.9
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
  * CVE-2026-22815 ( SUSE ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
  * CVE-2026-22815 ( NVD ):  6.9

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/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
  * CVE-2026-22815 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-34513 ( SUSE ):  6.3
    CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
  * CVE-2026-34513 ( SUSE ):  3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
  * CVE-2026-34513 ( NVD ):  2.7

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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
  * CVE-2026-34513 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-34514 ( SUSE ):  6.3
    CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
  * CVE-2026-34514 ( SUSE ):  4.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
  * CVE-2026-34514 ( NVD ):  2.7

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
  * CVE-2026-34514 ( NVD ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
  * CVE-2026-34516 ( SUSE ):  6.9
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
  * CVE-2026-34516 ( SUSE ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
  * CVE-2026-34516 ( NVD ):  6.6

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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
  * CVE-2026-34516 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-34517 ( SUSE ):  2.3
    CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
  * CVE-2026-34517 ( SUSE ):  3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L
  * CVE-2026-34517 ( NVD ):  2.7

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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
  * CVE-2026-34517 ( NVD ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
  * CVE-2026-34518 ( SUSE ):  6.9
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-34518 ( SUSE ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
  * CVE-2026-34518 ( NVD ):  2.7

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/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
  * CVE-2026-34518 ( NVD ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
  * CVE-2026-34519 ( SUSE ):  6.3
    CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-34519 ( SUSE ):  3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
  * CVE-2026-34519 ( NVD ):  2.7

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
  * CVE-2026-34519 ( NVD ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
  * CVE-2026-34520 ( SUSE ):  6.9
    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
  * CVE-2026-34520 ( SUSE ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
  * CVE-2026-34520 ( NVD ):  2.7

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
  * CVE-2026-34520 ( NVD ):  9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
  * CVE-2026-34525 ( SUSE ):  6.3
    CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N
  * CVE-2026-34525 ( SUSE ):  5.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
  * CVE-2026-34525 ( NVD ):  6.3

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/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
  * CVE-2026-34525 ( NVD ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
  * CVE-2026-34993 ( SUSE ):  7.0 CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
  * CVE-2026-34993 ( NVD ):  6.4 CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:L/I:H/A:L
  * CVE-2026-34993 ( NVD ):  7.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
  * CVE-2026-47265 ( SUSE ):  5.3 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
  * CVE-2026-47265 ( NVD ):  6.6

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/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
  * CVE-2026-47265 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

  
Affected Products:

  * SUSE Linux Enterprise Server 16.0
  * SUSE Linux Enterprise Server for SAP applications 16.0

  
  
An update that solves 11 vulnerabilities can now be installed.

## Description:

This update for python-aiohttp fixes the following issues

  * CVE-2026-22815: insufficient header/trailer handling can cause a denial of
    service (bsc#1261320).
  * CVE-2026-34513: unbounded DNS cache can cause a denial of service
    (bsc#1261321).
  * CVE-2026-34514: content_type parameter manipulation can lead to header
    Injection (bsc#1261322).
  * CVE-2026-34516: excessive multipart headers can cause a denial of service
    (bsc#1261329).
  * CVE-2026-34517: large multipart form fields can cause a denial of service
    (bsc#1261331).
  * CVE-2026-34518: retained Cookie and Proxy-Authorization headers during
    redirects can lead to information disclosure (bsc#1261332).
  * CVE-2026-34519: reason parameter can be use to perform header injection
    (bsc#1261334).
  * CVE-2026-34520: improper character handling can lead to header injection
    (bsc#1261335).
  * CVE-2026-34525: multiple Host headers can potentially lead to security
    bypass (bsc#1261343).
  * CVE-2026-34993: arbitrary code execution via loading untrusted input in
    CookieJar.load() (bsc#1267471).
  * CVE-2026-47265: cookies set with the `cookies` parameter on requests are
    sent after following a cross-origin redirect (bsc#1267561).

## Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like
YaST online_update or "zypper patch".  
Alternatively you can run the command listed for your product:

  * SUSE Linux Enterprise Server 16.0  
    zypper in -t patch SUSE-SLES-16.0-963=1

  * SUSE Linux Enterprise Server for SAP applications 16.0  
    zypper in -t patch SUSE-SLES-16.0-963=1

## Package List:

  * SUSE Linux Enterprise Server for SAP applications 16.0 (ppc64le x86_64)
    * python313-aiohttp-debuginfo-3.11.16-160000.5.1
    * python-aiohttp-debugsource-3.11.16-160000.5.1
    * python313-aiohttp-3.11.16-160000.5.1
  * SUSE Linux Enterprise Server 16.0 (aarch64 ppc64le s390x x86_64)
    * python313-aiohttp-debuginfo-3.11.16-160000.5.1
    * python-aiohttp-debugsource-3.11.16-160000.5.1
    * python313-aiohttp-3.11.16-160000.5.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-22815.html
  * https://www.suse.com/security/cve/CVE-2026-34513.html
  * https://www.suse.com/security/cve/CVE-2026-34514.html
  * https://www.suse.com/security/cve/CVE-2026-34516.html
  * https://www.suse.com/security/cve/CVE-2026-34517.html
  * https://www.suse.com/security/cve/CVE-2026-34518.html
  * https://www.suse.com/security/cve/CVE-2026-34519.html
  * https://www.suse.com/security/cve/CVE-2026-34520.html
  * https://www.suse.com/security/cve/CVE-2026-34525.html
  * https://www.suse.com/security/cve/CVE-2026-34993.html
  * https://www.suse.com/security/cve/CVE-2026-47265.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1261320
  * https://bugzilla.suse.com/show_bug.cgi?id=1261321
  * https://bugzilla.suse.com/show_bug.cgi?id=1261322
  * https://bugzilla.suse.com/show_bug.cgi?id=1261329
  * https://bugzilla.suse.com/show_bug.cgi?id=1261331
  * https://bugzilla.suse.com/show_bug.cgi?id=1261332
  * https://bugzilla.suse.com/show_bug.cgi?id=1261334
  * https://bugzilla.suse.com/show_bug.cgi?id=1261335
  * https://bugzilla.suse.com/show_bug.cgi?id=1261343
  * https://bugzilla.suse.com/show_bug.cgi?id=1267471
  * https://bugzilla.suse.com/show_bug.cgi?id=1267561





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