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
02 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
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 4.48% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 91.2% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-10-14.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2022-09-09 00:00Z4 YR AGO
- Last updated
- 2026-10-14 08:55Z15 DAYS AGO
- Reserved
- 2020-03-20
- Assigning CNA
- redhat
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 6.2)
- CNA CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- Data version
- 5.2
- Document digest
- e893e3b643449a3f1b95dee7b88972baca52e03fde2b3787df61253afd6c632e
05 Affected products
06 References
- access.redhat.comhttps://access.redhat.com/security/cve/CVE-2020-10735
- github.comhttps://github.com/python/cpython/issues/95778
- docs.google.comhttps://docs.google.com/document/d/1KjuF_aXlzPUxTK4BMgezGJ2Pn7uevfX7g0_mvgHlL7Y
- bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1834423
- lists.fedoraproject.orgFEDORA-2022-46a44a7f83https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4EWKR2SPX3JORLWCXFY3KN2U5B5CIUQQ/
- lists.fedoraproject.orgFEDORA-2022-66b65beccbhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2VCU6EVQDIXNCEDJUCTFIER2WVNNDTYZ/
- lists.fedoraproject.orgFEDORA-2022-4b31e33ed0https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V7ZUJDHK7KNG6SLIFXW7MNZ6O2PUJYK6/
- lists.fedoraproject.orgFEDORA-2022-6d57598a23https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HSRPVJZL6DJFWKYRHMNJB7VCEUCBKRF5/
- lists.fedoraproject.orgFEDORA-2022-f330bbfda2https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6XL6E5A3I36TRR73VNBOXNIQP4AMZDFZ/
- lists.fedoraproject.orgFEDORA-2022-29d436596fhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/32AAQKABEKFCB5DDV5OONRZK6BS23HPW/
- lists.fedoraproject.orgFEDORA-2022-b01214472ehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U4ZZV4CDFRMTPDBI7C5L43RFL3XLIGUY/
- lists.fedoraproject.orgFEDORA-2022-dd5032bedfhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SZYJSGLSCQOKXXFVJVJQAXLEOJBIWGEL/
- lists.fedoraproject.orgFEDORA-2022-8535093cbahttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OT5WQB7Z3CXOWVBD2AFAHYPA5ONYFFZ4/
- lists.fedoraproject.orgFEDORA-2022-72213986b8https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UBPDVCDIUCEBE7C4NAGNA2KQJYOTPBAZ/
- www.openwall.com[oss-security] 20220921 big ints in python: CVE-2020-10735http://www.openwall.com/lists/oss-security/2022/09/21/1
- www.openwall.com[oss-security] 20220921 Re: big ints in python: CVE-2020-10735http://www.openwall.com/lists/oss-security/2022/09/21/4
- lists.fedoraproject.orgFEDORA-2022-f511f8f58bhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OKYE2DOI2X7WZXAWTQJZAXYIWM37HDCY/
- lists.fedoraproject.orgFEDORA-2022-c072cdc3c8https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OT5U223OE5ZOUHZAZYSYSWVJQIKDE73E/
- lists.fedoraproject.orgFEDORA-2022-0b3904c674https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PD7FTLJOIGMUSCDR3JAN6WRFHJEE4PH5/
- lists.fedoraproject.orgFEDORA-2022-141f632a6fhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/76YE7AM37MRU76XJV4M27CWDAMUGNRYK/
- lists.fedoraproject.orgFEDORA-2022-ac82a548dfhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZEOAJWGGY55QU35UM2OVZATBW5MX2OZD/
- lists.fedoraproject.orgFEDORA-2022-d4570fc1a6https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NHC6IUU7CLRQ3QLPWUXLONSG3SXFTR47/
- lists.fedoraproject.orgFEDORA-2022-b8b34e62abhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TD7JDDKJXK6D26XAN3YRFNM2LAJHT5UO/
- lists.fedoraproject.orgFEDORA-2022-d1682fef04https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WXF6MQ74HVIDDSR5AE2UDR24I6D4FEPC/
- lists.fedoraproject.orgFEDORA-2022-79843dfb3chttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IFGV7P2PYFBMK32OKHCAC2ZPJQV5AUDF/
- lists.fedoraproject.orgFEDORA-2022-958fd7a32ehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMWPRAAJS7I6U3U45V7GZVXWNSECI22M/
- lists.debian.orghttps://lists.debian.org/debian-lts-announce/2023/06/msg00039.html
- lists.debian.orghttps://lists.debian.org/debian-lts-announce/2024/12/msg00000.html
- lists.debian.orghttps://lists.debian.org/debian-lts-announce/2024/11/msg00024.html
- cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-398330.html
- cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-806742.html
07 Fixed in
AlmaLinux 8
- platform-python Fixed in 3.6.8-48.el8_7.1.alma
- platform-python-debug Fixed in 3.6.8-48.el8_7.1.alma
- platform-python-devel Fixed in 3.6.8-48.el8_7.1.alma
- python3-idle Fixed in 3.6.8-48.el8_7.1.alma
- python3-libs Fixed in 3.6.8-48.el8_7.1.alma
- python3-test Fixed in 3.6.8-48.el8_7.1.alma
- python3-tkinter Fixed in 3.6.8-48.el8_7.1.alma
- python38 Fixed in 3.8.16-1.module_el8.8.0+3482+d5d93a3e
- python38-Cython Fixed
A version is affected if any line below covers it.
- Affected before 0.29.14-4.module_el8.6.0+2778+cd494b30
- Affected before 0.29.14-4.module_el8.6.0+3163+f4472775
- python38-PyMySQL Fixed in 0.10.1-1.module_el8.6.0+2778+cd494b30
- python38-asn1crypto Fixed in 1.2.0-3.module_el8.6.0+2778+cd494b30
- python38-atomicwrites Fixed in 1.3.0-8.module_el8.6.0+2778+cd494b30
- python38-attrs Fixed in 19.3.0-3.module_el8.6.0+2778+cd494b30
- python38-babel Fixed in 2.7.0-11.module_el8.6.0+2778+cd494b30
- python38-cffi Fixed
A version is affected if any line below covers it.
- Affected before 1.13.2-3.module_el8.6.0+2778+cd494b30
- Affected before 1.13.2-3.module_el8.6.0+3163+f4472775
- python38-chardet Fixed in 3.0.4-19.module_el8.6.0+2778+cd494b30
- python38-cryptography Fixed
A version is affected if any line below covers it.
- Affected before 2.8-3.module_el8.6.0+2778+cd494b30
- Affected before 2.8-3.module_el8.6.0+3163+f4472775
- python38-debug Fixed in 3.8.16-1.module_el8.8.0+3482+d5d93a3e
- python38-devel Fixed in 3.8.16-1.module_el8.8.0+3482+d5d93a3e
- python38-idle Fixed in 3.8.16-1.module_el8.8.0+3482+d5d93a3e
- python38-idna Fixed in 2.8-6.module_el8.6.0+2778+cd494b30
- python38-jinja2 Fixed in 2.11.3-1.module_el8.7.0+3344+99a6a656
- python38-libs Fixed in 3.8.16-1.module_el8.8.0+3482+d5d93a3e
- python38-lxml Fixed
A version is affected if any line below covers it.
- Affected before 4.4.1-7.module_el8.6.0+2778+cd494b30
- Affected before 4.4.1-7.module_el8.6.0+3163+f4472775
- python38-markupsafe Fixed
A version is affected if any line below covers it.
- Affected before 1.1.1-6.module_el8.6.0+2778+cd494b30
- Affected before 1.1.1-6.module_el8.6.0+3163+f4472775
- python38-mod_wsgi Fixed in 4.6.8-4.module_el8.7.0+3344+99a6a656
- python38-more-itertools Fixed in 7.2.0-5.module_el8.6.0+2778+cd494b30
- python38-numpy Fixed
A version is affected if any line below covers it.
- Affected before 1.17.3-6.module_el8.6.0+2778+cd494b30
- Affected before 1.17.3-6.module_el8.6.0+3163+f4472775
- python38-numpy-doc Fixed in 1.17.3-6.module_el8.6.0+2778+cd494b30
- python38-numpy-f2py Fixed
A version is affected if any line below covers it.
- Affected before 1.17.3-6.module_el8.6.0+2778+cd494b30
- Affected before 1.17.3-6.module_el8.6.0+3163+f4472775
- python38-packaging Fixed in 19.2-3.module_el8.6.0+2778+cd494b30
- python38-pip Fixed in 19.3.1-6.module_el8.7.0+3344+99a6a656
- python38-pip-wheel Fixed in 19.3.1-6.module_el8.7.0+3344+99a6a656
- python38-pluggy Fixed in 0.13.0-3.module_el8.6.0+2778+cd494b30
- python38-ply Fixed in 3.11-10.module_el8.6.0+2778+cd494b30
- python38-psutil Fixed
A version is affected if any line below covers it.
- Affected before 5.6.4-4.module_el8.6.0+2778+cd494b30
- Affected before 5.6.4-4.module_el8.6.0+3163+f4472775
- python38-psycopg2 Fixed in 2.8.4-4.module_el8.7.0+3344+99a6a656
- python38-psycopg2-doc Fixed in 2.8.4-4.module_el8.7.0+3344+99a6a656
- python38-psycopg2-tests Fixed in 2.8.4-4.module_el8.7.0+3344+99a6a656
- python38-py Fixed in 1.8.0-8.module_el8.6.0+2778+cd494b30
67 further packages in AlmaLinux 8 not shown (first 40 listed).
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 9
- python-unversioned-command Fixed in 3.9.10-3.el9_0
- python3 Fixed in 3.9.10-3.el9_0
- python3-debug Fixed in 3.9.10-3.el9_0
- python3-devel Fixed in 3.9.10-3.el9_0
- python3-idle Fixed in 3.9.10-3.el9_0
- python3-libs Fixed in 3.9.10-3.el9_0
- python3-test Fixed in 3.9.10-3.el9_0
- python3-tkinter Fixed in 3.9.10-3.el9_0
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 8
- platform-python Fixed in 3.6.8-48.el8_7.1.alma
- platform-python-debug Fixed in 3.6.8-48.el8_7.1.alma
- platform-python-devel Fixed in 3.6.8-48.el8_7.1.alma
- python3-idle Fixed in 3.6.8-48.el8_7.1.alma
- python3-libs Fixed in 3.6.8-48.el8_7.1.alma
- python3-test Fixed in 3.6.8-48.el8_7.1.alma
- python3-tkinter Fixed in 3.6.8-48.el8_7.1.alma
- python38 Fixed in 3.8.16-1.module_el8.8.0+3482+d5d93a3e
- python38-Cython Fixed
A version is affected if any line below covers it.
- Affected before 0.29.14-4.module_el8.6.0+2778+cd494b30
- Affected before 0.29.14-4.module_el8.6.0+3163+f4472775
- python38-PyMySQL Fixed in 0.10.1-1.module_el8.6.0+2778+cd494b30
- python38-asn1crypto Fixed in 1.2.0-3.module_el8.6.0+2778+cd494b30
- python38-atomicwrites Fixed in 1.3.0-8.module_el8.6.0+2778+cd494b30
- python38-attrs Fixed in 19.3.0-3.module_el8.6.0+2778+cd494b30
- python38-babel Fixed in 2.7.0-11.module_el8.6.0+2778+cd494b30
- python38-cffi Fixed
A version is affected if any line below covers it.
- Affected before 1.13.2-3.module_el8.6.0+2778+cd494b30
- Affected before 1.13.2-3.module_el8.6.0+3163+f4472775
- python38-chardet Fixed in 3.0.4-19.module_el8.6.0+2778+cd494b30
- python38-cryptography Fixed
A version is affected if any line below covers it.
- Affected before 2.8-3.module_el8.6.0+2778+cd494b30
- Affected before 2.8-3.module_el8.6.0+3163+f4472775
- python38-debug Fixed in 3.8.16-1.module_el8.8.0+3482+d5d93a3e
- python38-devel Fixed in 3.8.16-1.module_el8.8.0+3482+d5d93a3e
- python38-idle Fixed in 3.8.16-1.module_el8.8.0+3482+d5d93a3e
- python38-idna Fixed in 2.8-6.module_el8.6.0+2778+cd494b30
- python38-jinja2 Fixed in 2.11.3-1.module_el8.7.0+3344+99a6a656
- python38-libs Fixed in 3.8.16-1.module_el8.8.0+3482+d5d93a3e
- python38-lxml Fixed
A version is affected if any line below covers it.
- Affected before 4.4.1-7.module_el8.6.0+2778+cd494b30
- Affected before 4.4.1-7.module_el8.6.0+3163+f4472775
- python38-markupsafe Fixed
A version is affected if any line below covers it.
- Affected before 1.1.1-6.module_el8.6.0+2778+cd494b30
- Affected before 1.1.1-6.module_el8.6.0+3163+f4472775
- python38-mod_wsgi Fixed in 4.6.8-4.module_el8.7.0+3344+99a6a656
- python38-more-itertools Fixed in 7.2.0-5.module_el8.6.0+2778+cd494b30
- python38-numpy Fixed
A version is affected if any line below covers it.
- Affected before 1.17.3-6.module_el8.6.0+2778+cd494b30
- Affected before 1.17.3-6.module_el8.6.0+3163+f4472775
- python38-numpy-doc Fixed in 1.17.3-6.module_el8.6.0+2778+cd494b30
- python38-numpy-f2py Fixed
A version is affected if any line below covers it.
- Affected before 1.17.3-6.module_el8.6.0+2778+cd494b30
- Affected before 1.17.3-6.module_el8.6.0+3163+f4472775
- python38-packaging Fixed in 19.2-3.module_el8.6.0+2778+cd494b30
- python38-pip Fixed in 19.3.1-6.module_el8.7.0+3344+99a6a656
- python38-pip-wheel Fixed in 19.3.1-6.module_el8.7.0+3344+99a6a656
- python38-pluggy Fixed in 0.13.0-3.module_el8.6.0+2778+cd494b30
- python38-ply Fixed in 3.11-10.module_el8.6.0+2778+cd494b30
- python38-psutil Fixed
A version is affected if any line below covers it.
- Affected before 5.6.4-4.module_el8.6.0+2778+cd494b30
- Affected before 5.6.4-4.module_el8.6.0+3163+f4472775
- python38-psycopg2 Fixed in 2.8.4-4.module_el8.7.0+3344+99a6a656
- python38-psycopg2-doc Fixed in 2.8.4-4.module_el8.7.0+3344+99a6a656
- python38-psycopg2-tests Fixed in 2.8.4-4.module_el8.7.0+3344+99a6a656
- python38-py Fixed in 1.8.0-8.module_el8.6.0+2778+cd494b30
67 further packages in CloudLinux 8 not shown (first 40 listed).
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 9
- python-unversioned-command Fixed in 3.9.10-3.el9_0
- python3 Fixed in 3.9.10-3.el9_0
- python3-debug Fixed in 3.9.10-3.el9_0
- python3-devel Fixed in 3.9.10-3.el9_0
- python3-idle Fixed in 3.9.10-3.el9_0
- python3-libs Fixed in 3.9.10-3.el9_0
- python3-test Fixed in 3.9.10-3.el9_0
- python3-tkinter Fixed in 3.9.10-3.el9_0
Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- pypy3 Fixed in 7.3.10+dfsg-1
- python3.11 Fixed in 3.11.0~rc2-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- pypy3 Fixed in 7.3.10+dfsg-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- pypy3 Fixed in 7.3.10+dfsg-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- python2.7 No fix yet
- python3.10 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 14.04 LTS
- python2.7 No fix yet
- python3.4 No fix yet
- python3.5 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 16.04 LTS
- python2.7 No fix yet
- python3.5 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 18.04 LTS
- python2.7 No fix yet
- python3.6 No fix yet
- python3.7 No fix yet
- python3.8 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 20.04 LTS
- python2.7 No fix yet
- python3.8 No fix yet
- python3.9 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.