CVE-2025-6069
HTMLParser quadratic complexity when processing malformed inputs
02 Description
HTMLParser quadratic complexity when processing malformed inputs
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
- 0.60% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 48.6% of scored records. A rank, not a probability.
- NVD base score
- 4.3 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
- NVD analysis status
- Deferred. NVD last modified this record on 2026-07-31.
- 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
- 2025-06-17 13:39Z1 YR AGO
- Last updated
- 2026-07-31 14:01Z2 MO AGO
- Reserved
- 2025-06-13
- Assigning CNA
- PSF
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 4.3)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
- Weaknesses
- CWE-1333Inefficient Regular Expression ComplexityBase
- Data version
- 5.2
- Document digest
- f661afa64b4bd7472b1eabe1ca24c8cad5ab6728079b2f2e4322190102226977
05 Affected products
06 References
- github.comhttps://github.com/python/cpython/issues/135462
- github.comhttps://github.com/python/cpython/pull/135464
- github.comhttps://github.com/python/cpython/commit/4455cbabf991e202185a25a631af206f60bbc949
- github.comhttps://github.com/python/cpython/commit/6eb6c5dbfb528bd07d77b60fd71fd05d81d45c41
- github.comhttps://github.com/python/cpython/commit/d851f8e258c7328814943e923a7df81bca15df4b
- mail.python.orghttps://mail.python.org/archives/list/security-announce@python.org/thread/K5PIYLR6EP3WR7ZOKKYQUWEDNQVUXOYM/
- github.comhttps://github.com/python/cpython/commit/8d1b3dfa09135affbbf27fb8babcf3c11415df49
- github.comhttps://github.com/python/cpython/commit/ab0893fd5c579d9cea30841680e6d35fc478afb5
- github.comhttps://github.com/python/cpython/commit/f3c6f882cddc8dc30320d2e73edf019e201394fc
- github.comhttps://github.com/python/cpython/commit/fdc9d214c01cb4588f540cfa03726bbf2a33fc15
07 Fixed in
AlmaLinux 8
- python39 Fixed in 3.9.25-2.module_el8.10.0+4083+53cad1fb
- python39-Cython Fixed
A version is affected if any line below covers it.
- Affected before 0.29.21-5.module_el8.6.0+2780+a40f65e1
- Affected before 0.29.21-5.module_el8.6.0+3248+c431e88c
- python39-PyMySQL Fixed in 0.10.1-2.module_el8.6.0+2780+a40f65e1
- python39-attrs Fixed in 20.3.0-2.module_el8.6.0+2780+a40f65e1
- python39-cffi Fixed
A version is affected if any line below covers it.
- Affected before 1.14.3-2.module_el8.6.0+2780+a40f65e1
- Affected before 1.14.3-2.module_el8.6.0+3248+c431e88c
- python39-chardet Fixed in 3.0.4-19.module_el8.6.0+2780+a40f65e1
- python39-cryptography Fixed in 3.3.1-3.module_el8.10.0+3765+2f9a457d
- python39-debug Fixed in 3.9.25-2.module_el8.10.0+4083+53cad1fb
- python39-devel Fixed in 3.9.25-2.module_el8.10.0+4083+53cad1fb
- python39-idle Fixed in 3.9.25-2.module_el8.10.0+4083+53cad1fb
- python39-idna Fixed in 2.10-4.module_el8.10.0+3849+a48d89aa
- python39-iniconfig Fixed in 1.1.1-2.module_el8.6.0+2780+a40f65e1
- python39-libs Fixed in 3.9.25-2.module_el8.10.0+4083+53cad1fb
- python39-lxml Fixed
A version is affected if any line below covers it.
- Affected before 4.6.5-1.module_el8.6.0+2780+a40f65e1
- Affected before 4.6.5-1.module_el8.6.0+3248+c431e88c
- python39-mod_wsgi Fixed in 4.7.1-7.module_el8.10.0+3989+a618fe15.1
- python39-more-itertools Fixed in 8.5.0-2.module_el8.6.0+2780+a40f65e1
- python39-numpy Fixed
A version is affected if any line below covers it.
- Affected before 1.19.4-3.module_el8.6.0+2780+a40f65e1
- Affected before 1.19.4-3.module_el8.6.0+3248+c431e88c
- python39-numpy-doc Fixed in 1.19.4-3.module_el8.6.0+2780+a40f65e1
- python39-numpy-f2py Fixed
A version is affected if any line below covers it.
- Affected before 1.19.4-3.module_el8.6.0+2780+a40f65e1
- Affected before 1.19.4-3.module_el8.6.0+3248+c431e88c
- python39-packaging Fixed in 20.4-4.module_el8.6.0+2780+a40f65e1
- python39-pip Fixed in 20.2.4-9.module_el8.10.0+3765+2f9a457d
- python39-pip-wheel Fixed in 20.2.4-9.module_el8.10.0+3765+2f9a457d
- python39-pluggy Fixed in 0.13.1-3.module_el8.6.0+2780+a40f65e1
- python39-ply Fixed in 3.11-10.module_el8.6.0+2780+a40f65e1
- python39-psutil Fixed
A version is affected if any line below covers it.
- Affected before 5.8.0-4.module_el8.6.0+2780+a40f65e1
- Affected before 5.8.0-4.module_el8.6.0+3248+c431e88c
- python39-psycopg2 Fixed in 2.8.6-3.module_el8.10.0+3765+2f9a457d
- python39-psycopg2-doc Fixed in 2.8.6-3.module_el8.10.0+3765+2f9a457d
- python39-psycopg2-tests Fixed in 2.8.6-3.module_el8.10.0+3765+2f9a457d
- python39-py Fixed in 1.10.0-1.module_el8.6.0+2780+a40f65e1
- python39-pybind11 Fixed
A version is affected if any line below covers it.
- Affected before 2.7.1-1.module_el8.6.0+2780+a40f65e1
- Affected before 2.7.1-1.module_el8.6.0+3248+c431e88c
- python39-pybind11-devel Fixed
A version is affected if any line below covers it.
- Affected before 2.7.1-1.module_el8.6.0+2780+a40f65e1
- Affected before 2.7.1-1.module_el8.6.0+3248+c431e88c
- python39-pycparser Fixed in 2.20-3.module_el8.6.0+2780+a40f65e1
- python39-pyparsing Fixed in 2.4.7-5.module_el8.6.0+2780+a40f65e1
- python39-pysocks Fixed in 1.7.1-4.module_el8.6.0+2780+a40f65e1
- python39-pytest Fixed in 6.0.2-2.module_el8.6.0+2780+a40f65e1
- python39-pyyaml Fixed
A version is affected if any line below covers it.
- Affected before 5.4.1-1.module_el8.6.0+2780+a40f65e1
- Affected before 5.4.1-1.module_el8.6.0+3248+c431e88c
- python39-requests Fixed in 2.25.0-3.module_el8.9.0+3634+fb2a896c
- python39-rpm-macros Fixed in 3.9.25-2.module_el8.10.0+4083+53cad1fb
- python39-scipy Fixed in 1.5.4-5.module_el8.9.0+3634+fb2a896c
- python39-setuptools Fixed in 50.3.2-7.module_el8.10.0+4040+9207bbc0
9 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 3.9.25-2.el9_7
- python3 Fixed in 3.9.25-2.el9_7
- python3-debug Fixed in 3.9.25-2.el9_7
- python3-devel Fixed in 3.9.25-2.el9_7
- python3-idle Fixed in 3.9.25-2.el9_7
- python3-libs Fixed in 3.9.25-2.el9_7
- python3-test Fixed in 3.9.25-2.el9_7
- python3-tkinter Fixed in 3.9.25-2.el9_7
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 8
- python39 Fixed in 3.9.25-2.module_el8.10.0+4083+53cad1fb
- python39-Cython Fixed
A version is affected if any line below covers it.
- Affected before 0.29.21-5.module_el8.6.0+2780+a40f65e1
- Affected before 0.29.21-5.module_el8.6.0+3248+c431e88c
- python39-PyMySQL Fixed in 0.10.1-2.module_el8.6.0+2780+a40f65e1
- python39-attrs Fixed in 20.3.0-2.module_el8.6.0+2780+a40f65e1
- python39-cffi Fixed
A version is affected if any line below covers it.
- Affected before 1.14.3-2.module_el8.6.0+2780+a40f65e1
- Affected before 1.14.3-2.module_el8.6.0+3248+c431e88c
- python39-chardet Fixed in 3.0.4-19.module_el8.6.0+2780+a40f65e1
- python39-cryptography Fixed in 3.3.1-3.module_el8.10.0+3765+2f9a457d
- python39-debug Fixed in 3.9.25-2.module_el8.10.0+4083+53cad1fb
- python39-devel Fixed in 3.9.25-2.module_el8.10.0+4083+53cad1fb
- python39-idle Fixed in 3.9.25-2.module_el8.10.0+4083+53cad1fb
- python39-idna Fixed in 2.10-4.module_el8.10.0+3849+a48d89aa
- python39-iniconfig Fixed in 1.1.1-2.module_el8.6.0+2780+a40f65e1
- python39-libs Fixed in 3.9.25-2.module_el8.10.0+4083+53cad1fb
- python39-lxml Fixed
A version is affected if any line below covers it.
- Affected before 4.6.5-1.module_el8.6.0+2780+a40f65e1
- Affected before 4.6.5-1.module_el8.6.0+3248+c431e88c
- python39-mod_wsgi Fixed in 4.7.1-7.module_el8.10.0+3989+a618fe15.1
- python39-more-itertools Fixed in 8.5.0-2.module_el8.6.0+2780+a40f65e1
- python39-numpy Fixed
A version is affected if any line below covers it.
- Affected before 1.19.4-3.module_el8.6.0+2780+a40f65e1
- Affected before 1.19.4-3.module_el8.6.0+3248+c431e88c
- python39-numpy-doc Fixed in 1.19.4-3.module_el8.6.0+2780+a40f65e1
- python39-numpy-f2py Fixed
A version is affected if any line below covers it.
- Affected before 1.19.4-3.module_el8.6.0+2780+a40f65e1
- Affected before 1.19.4-3.module_el8.6.0+3248+c431e88c
- python39-packaging Fixed in 20.4-4.module_el8.6.0+2780+a40f65e1
- python39-pip Fixed in 20.2.4-9.module_el8.10.0+3765+2f9a457d
- python39-pip-wheel Fixed in 20.2.4-9.module_el8.10.0+3765+2f9a457d
- python39-pluggy Fixed in 0.13.1-3.module_el8.6.0+2780+a40f65e1
- python39-ply Fixed in 3.11-10.module_el8.6.0+2780+a40f65e1
- python39-psutil Fixed
A version is affected if any line below covers it.
- Affected before 5.8.0-4.module_el8.6.0+2780+a40f65e1
- Affected before 5.8.0-4.module_el8.6.0+3248+c431e88c
- python39-psycopg2 Fixed in 2.8.6-3.module_el8.10.0+3765+2f9a457d
- python39-psycopg2-doc Fixed in 2.8.6-3.module_el8.10.0+3765+2f9a457d
- python39-psycopg2-tests Fixed in 2.8.6-3.module_el8.10.0+3765+2f9a457d
- python39-py Fixed in 1.10.0-1.module_el8.6.0+2780+a40f65e1
- python39-pybind11 Fixed
A version is affected if any line below covers it.
- Affected before 2.7.1-1.module_el8.6.0+2780+a40f65e1
- Affected before 2.7.1-1.module_el8.6.0+3248+c431e88c
- python39-pybind11-devel Fixed
A version is affected if any line below covers it.
- Affected before 2.7.1-1.module_el8.6.0+2780+a40f65e1
- Affected before 2.7.1-1.module_el8.6.0+3248+c431e88c
- python39-pycparser Fixed in 2.20-3.module_el8.6.0+2780+a40f65e1
- python39-pyparsing Fixed in 2.4.7-5.module_el8.6.0+2780+a40f65e1
- python39-pysocks Fixed in 1.7.1-4.module_el8.6.0+2780+a40f65e1
- python39-pytest Fixed in 6.0.2-2.module_el8.6.0+2780+a40f65e1
- python39-pyyaml Fixed
A version is affected if any line below covers it.
- Affected before 5.4.1-1.module_el8.6.0+2780+a40f65e1
- Affected before 5.4.1-1.module_el8.6.0+3248+c431e88c
- python39-requests Fixed in 2.25.0-3.module_el8.9.0+3634+fb2a896c
- python39-rpm-macros Fixed in 3.9.25-2.module_el8.10.0+4083+53cad1fb
- python39-scipy Fixed in 1.5.4-5.module_el8.9.0+3634+fb2a896c
- python39-setuptools Fixed in 50.3.2-7.module_el8.10.0+4040+9207bbc0
9 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 3.9.25-2.el9_7
- python3 Fixed in 3.9.25-2.el9_7
- python3-debug Fixed in 3.9.25-2.el9_7
- python3-devel Fixed in 3.9.25-2.el9_7
- python3-idle Fixed in 3.9.25-2.el9_7
- python3-libs Fixed in 3.9.25-2.el9_7
- python3-test Fixed in 3.9.25-2.el9_7
- python3-tkinter Fixed in 3.9.25-2.el9_7
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
- jython No fix yet
- pypy3 No fix yet
- python3.11 Fixed in 3.11.2-6+deb12u7
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- jython No fix yet
- pypy3 No fix yet
- python3.13 Fixed in 3.13.5-2+deb13u1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- jython No fix yet
- pypy3 Fixed in 7.3.21+dfsg-1
- python3.13 Fixed in 3.13.6-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- jython No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- jython No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- jython No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- jython No fix yet
- python3.10 Fixed in 3.10.12-1~22.04.11
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- jython No fix yet
- python3.12 Fixed in 3.12.3-1ubuntu0.8
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 25.10
- jython No fix yet
- python3.13 Fixed in 3.13.6-1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.04 LTS
- jython No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.10
- jython 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 Fixed in 3.4.3-1ubuntu1~14.04.7+esm16Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro
- python3.5 Fixed in 3.5.2-2ubuntu0~16.04.4~14.04.1+esm7Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro
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 Fixed in 3.5.2-2ubuntu0~16.04.13+esm19Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
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 Fixed in 3.6.9-1~18.04ubuntu1.13+esm6Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- python3.7 Fixed in 3.7.5-2ubuntu1~18.04.2+esm7Available with Ubuntu Pro: https://ubuntu.com/pro
- python3.8 Fixed in 3.8.0-3ubuntu1~18.04.2+esm6Available with Ubuntu Pro: https://ubuntu.com/pro
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 Fixed in 3.8.10-0ubuntu1~20.04.18+esm2Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- python3.9 Fixed in 3.9.5-3ubuntu0~20.04.1+esm6Available with Ubuntu Pro: https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 22.04 LTS
- python2.7 No fix yet
- python3.11 Fixed in 3.11.0~rc1-1~22.04.1~esm5Available with Ubuntu Pro: https://ubuntu.com/pro
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.