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CVE-2026-59881VulnerabilityPublished Updated

SUSE vdirsyncer · Security update for python-aiohttp

Affects SUSE vdirsyncerSource GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2026-59881· Medium 6.9

Not known to be exploited · CVSS 6.9 Medium · fixed in Ubuntu package updates : update SUSE vdirsyncer when convenient.

Data as of 31 Oct 2026, 20:20 UTC

CVSS 4.0 base score
6.9Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.5% chance of exploitation in 30 days – higher than 44% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 0.20.0_8, 1.16.51_2
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

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 30 Jul 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_8; bzt to 1.16.51_2.

Affected software

ProductAffectedFixed in
Homebrewvdirsyncerpkg:brew/vdirsyncerOther threatsAffected
  • >=0.19.0 <0.20.0_8
Fixed in
  • 0.20.0_8
Homebrewbztpkg:brew/bztOther threatsAffected
  • >=1.16.2 <1.16.51_2
Fixed in
  • 1.16.51_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–
Ubuntu Pro 22.04 LTSpython-aiohttppkg:deb/ubuntu/python-aiohttp?arch=source&distro=esm-apps/jammyOther threatsAffected
  • 3.7.4-1 – 3.8.1-4ubuntu0.2+esm3
9 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-2026-59881: excessive resource consumption due to WebSocket client accepting compressed frames without negotiated permessage-deflate (bsc#1273125). - CVE-2026-69243: HTTP request smuggling via the WebSocket upgrade procedure (bsc#1273553). - CVE-2026-69244: out-of-bounds heap read in the C response parser while building an error message for a malformed response (bsc#1273552).

References

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