Medium severity4.8NVD Advisory· Published Apr 21, 2026· Updated Apr 24, 2026

CVE-2026-40606

Description

mitmproxy is a interactive TLS-capable intercepting HTTP proxy for penetration testers and software developers and mitmweb is a web-based interface for mitmproxy. In mitmproxy 12.2.1 and below, the builtin LDAP proxy authentication does not correctly sanitize the username when querying the LDAP server. This allows a malicious client to bypass authentication. Only mitmproxy instances using the proxyauth option with LDAP are affected. This option is not enabled by default. The vulnerability has been fixed in mitmproxy 12.2.2 and above.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected packages

Versions sourced from the GitHub Security Advisory.

Package	Affected versions	Patched versions
mitmproxyPyPI	< 12.2.2	12.2.2

Affected products

Mitmproxy/Mitmproxy
cpe:2.3:a:mitmproxy:mitmproxy:*:*:*:*:*:*:*:*
Range: <12.2.2
ghsa-coords2 versions
pkg:pypi/mitmproxy pkg:rpm/opensuse/python-mitmproxy&distro=openSUSE%20Tumbleweed
< 12.2.2+ 1 more
- (no CPE)range: < 12.2.2
- (no CPE)range: < 12.2.2-1.1

Patches

Vulnerability mechanics

References

github.com/advisories/GHSA-527g-3w9m-29hvghsaADVISORY
github.com/mitmproxy/mitmproxy/security/advisories/GHSA-527g-3w9m-29hvnvdVendor AdvisoryWEB
nvd.nist.gov/vuln/detail/CVE-2026-40606ghsaADVISORY
github.com/pypa/advisory-database/tree/main/vulns/mitmproxy/PYSEC-2026-92.yamlghsaWEB

News mentions

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cvss	0.312
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000