CVE-2020-10735

A flaw was found in python. In algorithms with quadratic time complexity using non-binary bases, when using int("text"), a system could take 50ms to parse an int string with 100,000 digits and 5s for 1,000,000 digits (float, decimal, int.from_bytes(), and int() for binary bases 2, 4, 8, 16, and 32 are not affected). The highest threat from this vulnerability is to system availability.

CVSS 3.1

7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

4.5% chance of exploitation in the next 30 days; higher than 91% of CVEs (scores of 2026-10-25)

CWE

CWE-704

Published

2022-09-09

Modified

2026-10-14

Record from

the NVD, synced 2026-10-19

Affected

• fedoraproject:fedora
• python:python
• redhat:enterprise_linux
• redhat:quay
• redhat:software_collections

References

• http://www.openwall.com/lists/oss-security/2022/09/21/1
• http://www.openwall.com/lists/oss-security/2022/09/21/4
• https://access.redhat.com/security/cve/CVE-2020-10735
• https://bugzilla.redhat.com/show_bug.cgi?id=1834423
• https://docs.google.com/document/d/1KjuF_aXlzPUxTK4BMgezGJ2Pn7uevfX7g0_mvgHlL7Y

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