SUSE-SU-2026:22819-1: important: Security update for python-aiohttp
SLE-SECURITY-UPDATES
null at suse.de
Mon Jul 27 17:57:44 UTC 2026
# Security update for python-aiohttp
Announcement ID: SUSE-SU-2026:22819-1
Release Date: 2026-07-18T09:46:55Z
Rating: important
References:
* bsc#1268398
* bsc#1268543
* bsc#1268544
* bsc#1268549
* bsc#1268556
* bsc#1268559
* bsc#1268560
* bsc#1268561
Cross-References:
* CVE-2026-50269
* CVE-2026-54273
* CVE-2026-54274
* CVE-2026-54275
* CVE-2026-54277
* CVE-2026-54278
* CVE-2026-54279
* CVE-2026-54280
CVSS scores:
* CVE-2026-50269 ( SUSE ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
* CVE-2026-50269 ( 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-2026-50269 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-54273 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-54273 ( 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-2026-54273 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-54274 ( SUSE ): 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
* CVE-2026-54274 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-54274 ( 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-2026-54274 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-54275 ( SUSE ): 4.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
* CVE-2026-54275 ( NVD ): 2.7
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/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-2026-54275 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-54277 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-54277 ( 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-2026-54277 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-54278 ( SUSE ): 8.2
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
* CVE-2026-54278 ( SUSE ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-54278 ( 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-2026-54278 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-54279 ( SUSE ): 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
* CVE-2026-54279 ( NVD ): 1.3
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/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-2026-54279 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-54280 ( SUSE ): 3.1 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
* CVE-2026-54280 ( NVD ): 1.7
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/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-2026-54280 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products:
* SUSE Linux Enterprise Server 16.0
* SUSE Linux Enterprise Server for SAP applications 16.0
An update that solves eight vulnerabilities can now be installed.
## Description:
This update for python-aiohttp fixes the following issues
* CVE-2026-50269: improper validation of user-controlled strings allows for
CRLF injection in multipart headers (bsc#1268398).
* CVE-2026-54273: no limit in the HTTP/1 pipelined request queue can lead to
excessive resource consumption (bsc#1268543).
* CVE-2026-54274: incomplete websocket frame payloads can bypass memory use
limits and cause a DoS via excessive resource consumption (bsc#1268544).
* CVE-2026-54275: `server_hostname` TLS SNI check bypass when an existing
connection is reused (bsc#1268549).
* CVE-2026-54277: `max_line_size` bypass when using the optimised C HTTP
parser can lead to excessive resource consumption (bsc#1268556).
* CVE-2026-54278: unread compressed request bodies can bypass
`client_max_size` during cleanup and cause a DoS (bsc#1268559).
* CVE-2026-54279: host-only cookies become domain cookies after `CookieJar`
persistence (bsc#1268560).
* CVE-2026-54280: payload resources are not closed correctly when a client
disconnects in the middle of a write and can cause resource starvation
(bsc#1268561).
## 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 for SAP applications 16.0
zypper in -t patch SUSE-SLES-16.0-1281=1
* SUSE Linux Enterprise Server 16.0
zypper in -t patch SUSE-SLES-16.0-1281=1
## Package List:
* SUSE Linux Enterprise Server 16.0 (aarch64 ppc64le s390x x86_64)
* python313-aiohttp-3.11.16-160000.6.1
* python-aiohttp-debugsource-3.11.16-160000.6.1
* python313-aiohttp-debuginfo-3.11.16-160000.6.1
* SUSE Linux Enterprise Server for SAP applications 16.0 (ppc64le x86_64)
* python313-aiohttp-3.11.16-160000.6.1
* python-aiohttp-debugsource-3.11.16-160000.6.1
* python313-aiohttp-debuginfo-3.11.16-160000.6.1
## References:
* https://www.suse.com/security/cve/CVE-2026-50269.html
* https://www.suse.com/security/cve/CVE-2026-54273.html
* https://www.suse.com/security/cve/CVE-2026-54274.html
* https://www.suse.com/security/cve/CVE-2026-54275.html
* https://www.suse.com/security/cve/CVE-2026-54277.html
* https://www.suse.com/security/cve/CVE-2026-54278.html
* https://www.suse.com/security/cve/CVE-2026-54279.html
* https://www.suse.com/security/cve/CVE-2026-54280.html
* https://bugzilla.suse.com/show_bug.cgi?id=1268398
* https://bugzilla.suse.com/show_bug.cgi?id=1268543
* https://bugzilla.suse.com/show_bug.cgi?id=1268544
* https://bugzilla.suse.com/show_bug.cgi?id=1268549
* https://bugzilla.suse.com/show_bug.cgi?id=1268556
* https://bugzilla.suse.com/show_bug.cgi?id=1268559
* https://bugzilla.suse.com/show_bug.cgi?id=1268560
* https://bugzilla.suse.com/show_bug.cgi?id=1268561
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