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CVE-2026-67429— Flyto2 Core: Arbitrary file write via image.download (and other file-writing modules)

Quick assessment

Affected
flytohub flyto-core
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Flyto2 Core是Flyto2组织的一个服务器与网络设备核心平台。 Flyto2 Core 2.26.6之前版本存在安全漏洞，该漏洞源于image.download和相关的写入文件模块使用调用者控制的output_dir而未使用validate_path_with_env_config和FLYTO_SANDBOX_DIR限制，允许攻击者控制的响应字节写入任意文件系统路径。

CVSS 10.0 · Critical EPSS 0.77% · P54

Affected Version Matrix 1

VendorProduct Version RangeStatus
flytohub flyto-core < 2.26.6 affected
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I. Basic Information for CVE-2026-67429

Vulnerability Information
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Vulnerability Title
Flyto2 Core: Arbitrary file write via image.download (and other file-writing modules)
Source: CVE Program / CVE List V5
Vulnerability Description
Flyto2 Core is an execution kernel for automation and AI-agent workflows. Prior to 2.26.6, image.download and related file-writing modules use caller-controlled output_dir instead of validate_path_with_env_config and its FLYTO_SANDBOX_DIR confinement, allowing attacker-controlled response bytes to be written to arbitrary filesystem paths the process can access. This issue is fixed in version 2.26.6.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Flyto2 Core 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Flyto2 Core是Flyto2组织的一个服务器与网络设备核心平台。 Flyto2 Core 2.26.6之前版本存在安全漏洞，该漏洞源于image.download和相关的写入文件模块使用调用者控制的output_dir而未使用validate_path_with_env_config和FLYTO_SANDBOX_DIR限制，允许攻击者控制的响应字节写入任意文件系统路径。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
flytohub flyto-core < 2.26.6 -

II. Public POCs for CVE-2026-67429

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 10691 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-67429

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Vendor Advisories for CVE-2026-67429 (2)

Same Patch Batch · flytohub · 2026-07-29 · 6 CVEs total

CVE-2026-67426 9.3 CRITICAL Flyto2 Core: Unauthenticated flyto-verification /run: callback_url SSRF and internal runne
CVE-2026-67427 8.6 HIGH Flyto2 Core: ${env.VAR} interpolation reads any env secret despite env.get being denyliste
CVE-2026-67425 8.6 HIGH Flyto2 Core: LLM/API keys leak to an attacker-controlled base_url
CVE-2026-67428 8.5 HIGH Flyto2 Core: Multiple HTTP-family modules fetch client-controlled URLs without the SSRF gu
CVE-2026-67424 8.5 HIGH Flyto2 Core: Guarded HTTP modules follow redirects into internal space without per-hop SSR

IV. Related Vulnerabilities

Same product: flyto-core
Same vendor: flytohub
Same weakness: CWE-22

V. Comments for CVE-2026-67429

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