CVE-2021-3116

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

before_upstream_connection in AuthPlugin in http/proxy/auth.py in proxy.py before 2.3.1 accepts incorrect Proxy-Authorization header data because of a boolean confusion (and versus or).

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Weakness enumeration

CWE-697

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://cardaci.xyz/advisories/2021/01/10/proxy.py-2.3.0-broken-basic-authentication/Exploit, Third Party Advisory
https://github.com/abhinavsingh/proxy.py/pull/482/commits/9b00093288237f5073c403f2c4f62acfdfa8ed46Patch
https://pypi.org/project/proxy.py/2.3.1/#historyProduct
https://cardaci.xyz/advisories/2021/01/10/proxy.py-2.3.0-broken-basic-authentication/Exploit, Third Party Advisory
https://github.com/abhinavsingh/proxy.py/pull/482/commits/9b00093288237f5073c403f2c4f62acfdfa8ed46Patch
https://pypi.org/project/proxy.py/2.3.1/#historyProduct

Timeline

Published: Jan 11, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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