CVE-2026-40606 | mitmproxy up to 12.2.1 ldap injection (GHSA-527g-3w9m-29hv)

VDB-358549 · CVE-2026-40606 · GHSA-527G-3W9M-29HV MITMPROXY UP TO 12.2.1 LDAP INJECTION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 5.1 $0-$5k 2.61+ Summaryinfo A vulnerability identified as problematic has been detected in mitmproxy up to 12.2.1. This issue affects some unknown processing. This manipulation causes ldap injection. The identification of this vulnerability is CVE-2026-40606. It is possible to initiate the attack remotely. There is no exploit available. You should upgrade the affected component. Detailsinfo A vulnerability was found in mitmproxy up to 12.2.1. It has been declared as problematic. Affected by this vulnerability is some unknown functionality. The manipulation with an unknown input leads to a ldap injection vulnerability. The CWE definition for the vulnerability is CWE-90. The product constructs all or part of an LDAP query using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended LDAP query when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is: 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. The advisory is shared at github.com. This vulnerability is known as CVE-2026-40606 since 04/14/2026. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1505 for this issue. Upgrading to version 12.2.2 eliminates this vulnerability. Productinfo Type Firewall Software Name mitmproxy Version 12.2.0 12.2.1 Website Product: https://github.com/mitmproxy/mitmproxy/ CPE 2.3info 🔒 🔒 CPE 2.2info 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 5.2 VulDB Meta Temp Score: 5.1 VulDB Base Score: 5.6 VulDB Temp Score: 5.4 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 4.8 CNA Vector (GitHub_M): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Ldap injection CWE: CWE-90 / CWE-74 / CWE-707 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: mitmproxy 12.2.2 Timelineinfo 04/14/2026 CVE reserved 04/21/2026 +7 days Advisory disclosed 04/21/2026 +0 days VulDB entry created 04/21/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: GHSA-527g-3w9m-29hv Status: Confirmed CVE: CVE-2026-40606 (🔒) GCVE (CVE): GCVE-0-2026-40606 GCVE (VulDB): GCVE-100-358549 Entryinfo Created: 04/21/2026 20:53 Changes: 04/21/2026 20:53 (63) Complete: 🔍 Cache ID: 99:947:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸