gcdRadar
archive/Patch now/AIR-2025-0487
closedclosed 30 Sep 2025Patch now2 Disclosed vulnerabilityAI

CVE-2025-59956: AgentAPI Client-Side DNS Rebinding Data Exfiltration Flaw

AgentAPI, Claude Code, Aider, Codex, Gemini

AgentAPI is susceptible to a client-side DNS rebinding attack when hosted over plain HTTP on localhost, allowing data exfiltration of local message history. A patch has been issued in version 0.4.0.

disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why

CVSS
6.5
EPSS
<0.01 · top 63% · 2026-11-13
EPSS scores by FIRST
fix status
Fix status unknown
first report
30 Sep 2025
last update
30 Sep 2025
CVE ids
CVE-2025-59956other records

Timeline · 1

  1. 30 Sep 2025CVE-2025-59956: AgentAPI is an HTTP API for Claude Code, Goose, Aider, Gemini, Amp, and Codex.

Sources · 1

Advisories and databases

  1. 2025-09-30
    CVE-2025-59956: AgentAPI is an HTTP API for Claude Code, Goose, Aider, Gemini, Amp, and Codex.
    NVD · nvd.nist.gov/vuln/detail/CVE-2025-59956

Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.

Classification

lane
Patch now
AI role
Attack on AI
categories
Infrastructure vulnerabilityData leak
severity
2 · Disclosed vulnerability
fix status
Fix status unknown
targets
Framework / tooling
owasp llm top 10
LLM02:2025 Sensitive Information DisclosureLLM03:2025 Supply Chain
mitre atlas
no technique for these categories
tags
dns-rebindingdata-leak
dates
happened 30 Sep 2025 · first reported 30 Sep 2025
origin
NVD
Vulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
record
confidence 0.95 · created 2026-10-18 10:04Z · updated 2026-10-18 10:04Z

Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned

Copy a brief

This record as a short Markdown brief, for a ticket, a chat or a coding agent.

the brief as text
# CVE-2025-59956: AgentAPI Client-Side DNS Rebinding Data Exfiltration Flaw

https://gcdradar.vercel.app/incidents/cve-2025-59956-agentapi-client-side-dns-rebinding-data-exfil · AIR-2025-0487 · closed 2025-09-30

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2025-09-30
- AI role: Attack on AI
- Products: AgentAPI, Claude Code, Aider, Codex, Gemini
- CVE ids: CVE-2025-59956
- CVSS: 6.5

## Summary

AgentAPI is susceptible to a client-side DNS rebinding attack when hosted over plain HTTP on localhost, allowing data exfiltration of local message history. A patch has been issued in version 0.4.0.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2025-09-30: CVE-2025-59956: AgentAPI is an HTTP API for Claude Code, Goose, Aider, Gemini, Amp, and Codex. (https://nvd.nist.gov/vuln/detail/CVE-2025-59956)

## Sources

- 2025-09-30 NVD: CVE-2025-59956: AgentAPI is an HTTP API for Claude Code, Goose, Aider, Gemini, Amp, and Codex. https://nvd.nist.gov/vuln/detail/CVE-2025-59956

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.

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