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CVE-2026-55206 py7zr: O(n^2) algorithmic complexity DoS in PackInfo._read()

🗓️ 08 Jul 2026 20:32:09Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 34 Views

CVE-2026-55206: py7zr DoS from O(n^2) in PackInfo.read via attacker controlled numstreams; fixed in 1.1.3.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-55206
8 Jul 202620:32
attackerkb
Circl
CVE-2026-55206
19 Jun 202609:32
circl
CVE
CVE-2026-55206
8 Jul 202620:32
cve
Debian CVE
CVE-2026-55206
8 Jul 202620:32
debiancve
EUVD
EUVD-2026-42397
8 Jul 202620:32
euvd
Github Security Blog
py7zr: O(n^2) algorithmic complexity DoS in PackInfo._read()
19 Jun 202621:16
github
NVD
CVE-2026-55206
8 Jul 202621:16
nvd
Tenable Nessus
openSUSE 16 Security Update : python-py7zr (openSUSE-SU-2026:21159-1)
1 Jul 202600:00
nessus
Tenable Nessus
Linux Distros Unpatched Vulnerability : CVE-2026-55206
10 Jul 202600:00
nessus
OPENSUSE Linux
python311-py7zr-1.1.3-1.1 on GA media (moderate)
27 Jun 202600:00
opensuse
Rows per page
[
  {
    "vendor": "miurahr",
    "product": "py7zr",
    "versions": [
      {
        "version": "< 1.1.3",
        "status": "affected"
      }
    ]
  }
]

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08 Jul 2026 20:32Current
CVSS 48.7
EPSS0.0021
34