Description
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.
Affected products
python: python; redhat: quay; redhat: software collections; fedoraproject: fedora; redhat: enterprise linux
References10
- github.com/python/cpython/issues/95778 PatchThird Party Advisory
- github.com/python/cpython/issues/95778 PatchThird Party Advisory
- www.openwall.com/lists/oss-security/2022/09/21/1 Third Party Advisory
- www.openwall.com/lists/oss-security/2022/09/21/4 Mailing ListThird Party Advisory
- access.redhat.com/security/cve/CVE-2020-10735 Third Party Advisory
- bugzilla.redhat.com/show_bug.cgi?id=1834423 Issue TrackingThird Party Advisory
- docs.google.com/document/d/1KjuF_aXlzPUxTK4BMgezGJ2Pn7uevfX7g0_… Third Party Advisory
- lists.debian.org/debian-lts-announce/2023/06/msg00039.html
- lists.fedoraproject.org/archives/list/package-announce%40lists.…
- lists.fedoraproject.org/archives/list/package-announce%40lists.…
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 5% percentile: 92 · as of 6 November 2026
- CWE
- CWE-704
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.