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CVE-2026-50269VulnerabilityPublished Updated

SUSE aiohttp · Security update for python-aiohttp

Affects SUSE aiohttpSource GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2026-50269· Low 2.7

Not known to be exploited · CVSS 2.7 Low · fixed in Ubuntu package updates : update SUSE aiohttp when convenient.

Data as of 31 Oct 2026, 20:20 UTC

CVSS 4.0 base score
2.7Low
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.5% chance of exploitation in 30 days – higher than 45% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 0.20.0_7, 1.16.50_2
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

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 22 Jun 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 31 Oct 2026.

What to do

Upgrade vdirsyncer to 0.20.0_7; bzt to 1.16.50_2.

Affected software

ProductAffectedFixed in
PyPIaiohttppkg:pypi/aiohttpOther threatsAffected
  • =3.11.16
Fixed in–
Homebrewvdirsyncerpkg:brew/vdirsyncerOther threatsAffected
  • >=0.19.0 <0.20.0_7
Fixed in
  • 0.20.0_7
Homebrewbztpkg:brew/bztOther threatsAffected
  • >=1.16.2 <1.16.50_2
Fixed in
  • 1.16.50_2
Ubuntu Pro 16.04 LTSpython-aiohttppkg:deb/ubuntu/python-aiohttp?arch=source&distro=esm-apps-legacy/xenialOther threatsAffected
  • 0.17.2-1 – 0.20.2-1ubuntu0.1~esm1
5 affected builds
Fixed in–
Ubuntu Pro 18.04 LTSpython-aiohttppkg:deb/ubuntu/python-aiohttp?arch=source&distro=esm-apps/bionicOther threatsAffected
  • 2.2.3-1build1 – 3.0.1-1ubuntu0.1~esm7
9 affected builds
Fixed in–
Ubuntu Pro 20.04 LTSpython-aiohttppkg:deb/ubuntu/python-aiohttp?arch=source&distro=esm-apps/focalOther threatsAffected
  • 3.5.4-1 – 3.6.2-1ubuntu1+esm6
12 affected builds
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

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).

References

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