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CVE-2026-55404— yt-dlp: Downstream command injection via improper sanitization of yt-dlp --write-link output

Quick assessment

Affected
yt-dlp yt-dlp
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.

yt-dlp是yt-dlp团队的一个视频下载命令行工具。 yt-dlp 2026.7.4之前版本存在输入验证错误漏洞，该漏洞源于--write-link、--write-url-link和--write-desktop-link选项在写入.url或.desktop快捷方式文件时，未对攻击者控制的webpage_url或filename元数据进行充分的验证或转义，可能导致Windows上的恶意file:// URI注入或Linux上基于换行的desktop entry键注入，如果生成的快捷方式被打开，可执行

CVSS 7.5 · High EPSS 0.64% · P49

Possible ATT&CK Techniques 2 AI

T1059.004 · Unix Shell T1406.003

Affected Version Matrix 1

VendorProduct Version RangeStatus
yt-dlp yt-dlp < 2026.7.4 affected
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I. Basic Information for CVE-2026-55404

Vulnerability Information
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Vulnerability Title
yt-dlp: Downstream command injection via improper sanitization of yt-dlp --write-link output
Source: CVE Program / CVE List V5
Vulnerability Description
yt-dlp and youtube-dl are command-line audio/video downloaders. Prior to 2026.7.4, the --write-link, --write-url-link, and --write-desktop-link options can write .url or .desktop shortcut files using attacker-controlled webpage_url or filename metadata without sufficient validation or escaping, allowing malicious file:// URI injection on Windows or newline-based desktop entry key injection on Linux that can execute commands if the generated shortcut is opened. This issue is fixed in version 2026.7.4.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
输出中的特殊元素转义处理不恰当(注入)
Source: CVE Program / CVE List V5
Vulnerability Title
yt-dlp 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
yt-dlp是yt-dlp团队的一个视频下载命令行工具。 yt-dlp 2026.7.4之前版本存在输入验证错误漏洞，该漏洞源于--write-link、--write-url-link和--write-desktop-link选项在写入.url或.desktop快捷方式文件时，未对攻击者控制的webpage_url或filename元数据进行充分的验证或转义，可能导致Windows上的恶意file:// URI注入或Linux上基于换行的desktop entry键注入，如果生成的快捷方式被打开，可执行
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
yt-dlp yt-dlp < 2026.7.4 -

II. Public POCs for CVE-2026-55404

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 9909 chars
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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
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III. Intelligence Information for CVE-2026-55404

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Patches & Fixes for CVE-2026-55404 (1)

Vendor Advisories for CVE-2026-55404 (1)

Vendor Pages for CVE-2026-55404 (1)

IV. Related Vulnerabilities

Same product: yt-dlp
Same vendor: yt-dlp
Same weakness: CWE-74

V. Comments for CVE-2026-55404

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