CVE-2026-7439 — AgentFlow's local web API accepts non-JSON content types on
CVE-2026-7439 — AgentFlow's local web API accepts non-JSON content types on POST /api/runs and POST /api/runs/validate endpoints without enforcing application/json validation, allowing attackers to bypass trust-boundary enforcement on sensitive operations. Attackers can exploit this content-type val
What This Means For You
- If your environment is affected by CWE-346, review your exposure and prioritize patching based on your environment. Monitor vendor advisories for CVE-2026-7439 updates and patches.
Related ATT&CK Techniques
🛡️ Detection Rules
2 rules · 6 SIEM formats2 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
CVE-2026-7439 - AgentFlow Local API Non-JSON Content Type POST
title: CVE-2026-7439 - AgentFlow Local API Non-JSON Content Type POST
id: scw-2026-04-29-ai-1
status: experimental
level: high
description: |
Detects attempts to interact with AgentFlow's local web API endpoints (/api/runs and /api/runs/validate) using POST requests. This rule specifically targets the vulnerability where the API accepts non-JSON content types, allowing for potential abuse of sensitive operations via browser-driven or local cross-origin requests.
author: SCW Feed Engine (AI-generated)
date: 2026-04-29
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-7439/
tags:
- attack.initial_access
- attack.t1190
logsource:
category: webserver
detection:
selection:
cs-method:
- 'POST'
uri:
- '/api/runs'
- '/api/runs/validate'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-7439 | vulnerability | CVE-2026-7439 |
| CWE-346 | weakness | CWE-346 |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | April 29, 2026 at 22:16 UTC |
This content was curated and summarized by Shimi's Cyber World for informational purposes. It is not copied or republished in full. All intellectual property rights remain with the original author and source.
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