Improper Input Validation in pip
A flaw was found in python-pip in the way it handled Unicode separators in git references. A remote attacker could possibly use this issue to install a different revision on a repository. The highest threat from this vulnerability is to data integrity. This is fixed in python-pip version 21.1.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | pip | < 21.1 | 21.1 |
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1962856
- https://github.com/advisories/GHSA-5xp3-jfq3-5q8x
- https://nvd.nist.gov/vuln/detail/CVE-2021-3572
- https://github.com/pypa/pip/pull/9827
- https://github.com/pypa/pip/commit/e46bdda9711392fec0c45c1175bae6db847cb30b
- https://access.redhat.com/errata/RHSA-2021:3254
- https://github.com/pypa/advisory-database/tree/main/vulns/pip/PYSEC-2021-437.yaml
- https://github.com/pypa/pip
- https://packetstormsecurity.com/files/162712/USN-4961-1.txt
- https://security.netapp.com/advisory/ntap-20240621-0006
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://www.oracle.com/security-alerts/cpujul2022.html
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N- Weakness (CWE)
CWE-20- Platform
- Python (PyPI)
- Package
pip- Disclosed
- 10.11.2021
- Updated
- 11.10.2026 12:19
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2021-437 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-5xp3-jfq3-5q8x - CC BY 4.0
Vulnerability history: pip
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 13
- First → latest
- 08.2013 07.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 4
- Medium 8
- Low 1
Disclosures per year
- 2017: 0
- 2018: 0
- 2019: 1
- 2020: 1
- 2021: 1
- 2022: 0
- 2023: 1
- 2024: 0
- 2025: 1
- 2026: 5
earlier: 3
-
Improper Input Validation in pip this entry
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