What is the CVSS score of CVE-2025-59956?

CVE-2025-59956 has a CVSS 3.1 base score of 6.5 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N. EPSS exploitation probability: 0.1%.

Which versions of Coder are affected by CVE-2025-59956?

Organizations using AgentAPI should be aware of notable risk from CVE-2025-59956 rated CVSS 6.5. Exploitation could compromise the security of affected deployments.. A patch is available.

Is there a public PoC exploit available for CVE-2025-59956?

Yes, a public proof-of-concept exploit is available for CVE-2025-59956. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2025-59956?

Within 7 days: Identify affected systems and apply vendor patches promptly. Vendor patch is available.

Coder CVE-2025-59956

MEDIUM

Reliance on Reverse DNS Resolution for a Security-Critical Action (CWE-350)

2025-09-30 security-advisories@github.com

Information Disclosure Coder Suse Agentapi

6.5

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

6.5 MEDIUM

AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

SUSE

MEDIUM

qualitative

Primary rating from GitHub Advisory.

CVSS VectorGitHub Advisory

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:15 vuln.today

Patch released

Mar 28, 2026 - 19:15 nvd

Patch available

PoC Detected

Oct 08, 2025 - 15:05 vuln.today

Public exploit code

CVE Published

Sep 30, 2025 - 11:37 nvd

MEDIUM 6.5

DescriptionGitHub Advisory

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.

AnalysisAI

AgentAPI is an HTTP API for Claude Code, Goose, Aider, Gemini, Amp, and Codex. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified under CWE-350. 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. Affected products include: Coder Agentapi. Version information: version 0.4.0..

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.