Improper validation of IPv6 and IPvFuture addresses
Priority LOW 37CWE-918Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Attack requirements
- Present
- Impact type
- —
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat.
Summary
The urllib.parse.urlsplit() and urlparse() functions improperly validated bracketed hosts (`[]`), allowing hosts that weren't IPv6 or IPvFuture. This behavior was not conformant to RFC 3986 and potentially enabled SSRF if a URL is processed by more than one URL parser.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00656 51st percentileScored 2026-11-07
Fix Fixed CPython (Python Software Foundation): 3.9.21, 3.10.16, 3.11.4 +1Red Hat: 3 advisories
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Python Software Foundation | CPython | before 3.9.21; 3.10.0 to before 3.10.16; 3.11.0 to before 3.11.4; 3.12.0a1 to before 3.12.0b1 | 3.9.21, 3.10.16, 3.11.4, 3.12.0b1 | Patch available | CNA |
- CPython VendorPython Software Foundation Affected before 3.9.21; 3.10.0 to before 3.10.16; 3.11.0 to before 3.11.4; 3.12.0a1 to before 3.12.0b1 Fixed in 3.9.21, 3.10.16, 3.11.4, 3.12.0b1 Patch available CNA
CPE names CISA-ADP · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:python_software_foundation:cpython:*:*:*:*:*:*:*:* | — | — | Python Software Foundation |
- cpe:2.3:a:python_software_foundation:cpython:*:*:*:*:*:*:*:* Versions — — ·Python Software Foundation
Remediation
- Fix · CNA CPython (Python Software Foundation) Fixed in 3.9.21, 3.10.16, 3.11.4, 3.12.0b1
Red Hat 3 advisories
- RHSA-2025:23530 Released 2025-12-18 · Red Hat rating Importantpython39:3.9 security update
- Red Hat Enterprise Linux AppStream (v. 8) PyYAML-5.4.1-1.module+el8.9.0+19644+d68f775d.src::python39:3.9, mod_wsgi-4.7.1-7.module+el8.10.0+23075+0aa18782.1.src::python39:3.9, numpy-1.19.4-3.module+el8.9.0+19644+d68f775d.src::python39:3.9 +47
- Red Hat Enterprise Linux CRB (v. 8) Cython-0.29.21-5.module+el8.9.0+19644+d68f775d.src::python39-devel:3.9, pybind11-2.7.1-1.module+el8.9.0+19644+d68f775d.src::python39-devel:3.9, pytest-6.0.2-2.module+el8.9.0+19644+d68f775d.src::python39-devel:3.9 +33
- RHSA-2024:10983 Released 2024-12-12 · Red Hat rating Moderatepython3.9:3.9.21 security update
- Red Hat CodeReady Linux Builder (v. 9) python3-3.9.21-1.el9_5, python3-debug-3.9.21-1.el9_5, python3-idle-3.9.21-1.el9_5 +2
- Red Hat Enterprise Linux AppStream (v. 9) python-unversioned-command-3.9.21-1.el9_5, python3-devel-3.9.21-1.el9_5, python3-tkinter-3.9.21-1.el9_5
- Red Hat Enterprise Linux BaseOS (v. 9) python3-3.9.21-1.el9_5, python3-libs-3.9.21-1.el9_5, python3.9-3.9.21-1.el9_5
- RHSA-2024:10779 Released 2024-12-04 · Red Hat rating Moderatepython3:3.6.8 security update
- Red Hat Enterprise Linux AppStream (v. 8) platform-python-3.6.8-69.el8_10, platform-python-debug-3.6.8-69.el8_10, platform-python-devel-3.6.8-69.el8_10 +3
- Red Hat Enterprise Linux BaseOS (v. 8) platform-python-3.6.8-69.el8_10, python3-3.6.8-69.el8_10, python3-libs-3.6.8-69.el8_10 +1
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat CodeReady Linux Builder (v. 9) | Fixed | RHSA-2024:10983 |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2024:10779, RHSA-2025:23530 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2024:10983 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2024:10779 |
| Red Hat Enterprise Linux BaseOS (v. 9) | Fixed | RHSA-2024:10983 |
| Red Hat Enterprise Linux CRB (v. 8) | Fixed | RHSA-2025:23530 |
Not affected: 3 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2024-11168
- 2026-10-03 Alias added: GHSA-qxg5-mcmp-m3m9
- 2026-10-13 EPSS moved to the 50th–90th percentile
References
Patch 5
- https://github.com/python/cpython/commit/29f348e232e82938ba2165843c448c2b291504c5
- https://github.com/python/cpython/pull/103849
- https://github.com/python/cpython/commit/b2171a2fd41416cf68afd67460578631d755a550
- https://github.com/python/cpython/commit/634ded45545ce8cbd6fd5d49785613dd7fa9b89e
- https://github.com/python/cpython/commit/ddca2953191c67a12b1f19d6bca41016c6ae7132
Advisory 1
More Python Software Foundation vulnerabilities
- TI-2024-07037 Quadratic complexity parsing cookies with backslashes CVSS 3.1HIGH 7.5
- TI-2024-11791 Bypass extraction filter to modify file metadata outside extraction directory CVSS 3.1MEDIUM 5.3
- TI-2024-00411 Quoted zip-bomb protection for zipfile CVSS 3.1MEDIUM 6.2
- TI-2026-13296 `HTTPPasswordMgr` can send saved HTTPS credentials via HTTP because of incorrect scheme matching CVSS 4.0MEDIUM 6.0
- TI-2024-06422 Email header injection due to unquoted newlines CVSS 3.1MEDIUM 5.5
- TI-2026-04606 Possible to hijack modules in current working directory CVSS 4.0MEDIUM 5.6
Sources
- CVE-2024-11168 · CVE Program
- CVE-2024-11168 · NVD
- FIRST EPSS
- GHSA-qxg5-mcmp-m3m9 · GitHub Advisory Database · CC BY 4.0
- CVE-2024-11168 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences