Forced Browsing in Twisted
Twisted before 16.3.1 does not attempt to address RFC 3875 section 4.1.18 namespace conflicts and therefore does not protect CGI applications from the presence of untrusted client data in the HTTP_PROXY environment variable, which might allow remote attackers to redirect a CGI application's outbound HTTP traffic to an arbitrary proxy server via a crafted Proxy header in an HTTP request, aka an httpoxy issue.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | twisted | < 16.3.1 | 16.3.1 |
References
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html
- https://www.openwall.com/lists/oss-security/2016/07/18/6
- https://twistedmatrix.com/trac/ticket/8623
- https://twistedmatrix.com/pipermail/twisted-web/2016-August/005268.html
- https://github.com/advisories/GHSA-3gqj-cmxr-p4x2
- https://nvd.nist.gov/vuln/detail/CVE-2016-1000111
- https://github.com/pypa/advisory-database/tree/main/vulns/twisted/PYSEC-2020-214.yaml
- https://github.com/twisted/twisted
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N- Weakness (CWE)
CWE-425- Platform
- Python (PyPI)
- Package
twisted- Disclosed
- 11.03.2020
- Updated
- 11.10.2026 11:20
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2020-214 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-3gqj-cmxr-p4x2 - CC BY 4.0
Vulnerability history: twisted
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
- 17
- First → latest
- 06.2019 10.2026
- Without a fix
- 1
- Exploited in attacks
- 0
Severity breakdown
- Critical 5
- High 4
- Medium 8
Disclosures per year
- 2019: 3
- 2020: 3
- 2021: 0
- 2022: 6
- 2023: 1
- 2024: 2
- 2025: 0
- 2026: 2
-
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