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py7zr: O(n^2) algorithmic complexity DoS in PackInfo._read()

🗓️ 19 Jun 2026 21:16:33Reported by GitHub Advisory DatabaseType 
github
 github
🔗 github.com👁 35 Views

py7zr DoS: PackInfo._read uses O(n^2) sums for pack positions; large numstreams trigger CPU burn.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-55206
8 Jul 202620:32
–attackerkb
circl
Circl
CVE-2026-55206
19 Jun 202609:32
–circl
cve
CVE
CVE-2026-55206
8 Jul 202620:32
–cve
cvelist
Cvelist
CVE-2026-55206 py7zr: O(n^2) algorithmic complexity DoS in PackInfo._read()
8 Jul 202620:32
–cvelist
debiancve
Debian CVE
CVE-2026-55206
8 Jul 202620:32
–debiancve
euvd
EUVD
EUVD-2026-42397
8 Jul 202620:32
–euvd
mend
Mend
CVE-2026-55206
8 Jul 202620:32
–mend
nvd
NVD
CVE-2026-55206
8 Jul 202621:16
–nvd
nessus
Tenable Nessus
openSUSE 16 Security Update : python-py7zr (openSUSE-SU-2026:21159-1)
1 Jul 202600:00
–nessus
nessus
Tenable Nessus
Linux Distros Unpatched Vulnerability : CVE-2026-55206
10 Jul 202600:00
–nessus
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Vulners
Node
py7zr_projectpy7zrRange≤1.1.2pip

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19 Jun 2026 21:16Current
6Medium risk
Vulners AI Score6
CVSS 48.7
EPSS0.00321
SSVC
35