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CVE-2026-23879VulnerabilityPublished Updated

SUSE · Security update for python-py7zr

Affects SUSESource GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2026-23879· High 8.0

Not known to be exploited · CVSS 8.0 High : upgrade SUSE py7zr to 1.1.3 soon.

Data as of 1 Nov 2026, 11:02 UTC

CVSS 3.1 base score
8.0High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.4% chance of exploitation in 30 days – higher than 42% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.1.3
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 24 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 1 Nov 2026.

What to do

Upgrade py7zr to 1.1.3.

Affected software

ProductAffectedFixed in
miurahrpy7zrAffected
  • <1.1.3
Fixed in
  • 1.1.3
PyPIpy7zrpkg:pypi/py7zrOther threatsAffected
  • <=1.1.2
Fixed in–

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

AI-suggested

If you cannot patch yet, avoid extracting untrusted .7z archives with python-py7zr to reduce risk.

Description

This security update for python-py7zr addresses three vulnerabilities: CVE-2026-23879 allows arbitrary file write via crafted malicious symbolic link chains in an archive; CVE-2026-55195 involves unchecked extraction size that can cause denial of service; and CVE-2026-55206 involves a crafted .7z archive with a large numstreams value that can also cause denial of service. These issues have been publicly disclosed and are rated with high severity.

References

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