CVE-2025-59956

Medium CVSS: 6.5

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.

Vendor

Coder

Product

Agentapi

CWE

CWE-350

Yayın Tarihi

2025-09-30 11:37:41

Güncelleme

2025-10-08 15:05:53

Source Identifier

security-advisories@github.com

KEV Date Added

Kategoriler

CWE-350 Agentapi MEDIUM Coder 2025

Referanslar

https://github.blog/security/application-security/localhost-dangers-cors-and-dns-rebinding https://github.com/coder/agentapi/commit/5c425c62447b8a9eac19e9fc5a2eae7f0803f149 https://github.com/coder/agentapi/pull/49 https://github.com/coder/agentapi/releases/tag/v0.4.0 https://github.com/coder/agentapi/security/advisories/GHSA-w64r-2g3w-w8w4 https://mcpsec.dev/advisories/2025-09-19-coder-chat-exfiltration https://mcpsec.dev/advisories/2025-09-19-coder-chat-exfiltration/