Is CVE-2026-40606 actively exploited?

No active exploitation of CVE-2026-40606 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-40606 be exploited remotely?

Yes. CVE-2026-40606 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-40606?

CVE-2026-40606 has a CVSS score of 4.8 (MEDIUM).

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MEDIUM

CVE-2026-40606

CWE-90Published: April 21, 2026· Updated: Apr 24, 2026

4.8

CVSS v3.1

EPSS:0.03%probability of exploitation in 30 daysPercentile:10.4th

Official 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.

NVD Source

Technical Analysis

CVE-2026-40606 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.