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GHSA-527g-3w9m-29hv
No affected components available
Impact
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.
Patches
The vulnerability has been fixed in mitmproxy 12.2.2 and above.
Acknowledgements
We thank Yue (Knox) Liu (@yueyueL) for responsibly disclosing this vulnerability to the mitmproxy team.
Timeline
- 2025-12-08: Received initial report.
- 2025-12-09: Verified report and confirmed receipt.
- 2026-01-02: Informed researcher that patch will be part of the next regular patch release.
- 2026-04-12: Published patch release and advisory.
The vulnerability can be exploited over the network without needing physical access. It is difficult for an attacker to exploit this vulnerability and may require special conditions. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a low impact on the confidentiality of the information. There is a low impact on the integrity of the data.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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