AgentAPI exposed user chat history via a DNS rebinding attack
Summary
AgentAPI exposed user chat history via a DNS rebinding attack
Original description
The description as published by the source.
AgentAPI is an HTTP API for Claude Code, Goose, Aider, Gemini, Amp, and Codex. Versions 0.3.3 and below are susceptible to a client-side DNS rebinding attack when hosted over plain HTTP on localhost. An attacker can gain access to the /messages endpoint served by the Agent API. This allows for the unauthorized exfiltration of sensitive user data, specifically local message history, which can include secret keys, file system contents, and intellectual property the user was working on locally. This issue is fixed in version 0.4.0.
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
References
- advisory github.com
- advisory github.com
- advisory mcpsec.dev
- advisory nvd.nist.gov
- patch github.com
- patch github.com
- report mcpsec.dev
- web github.com
- web github.blog