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CVE-2026-123364— OctoPrint: Stored XSS via saved connection parameters

Quick assessment

Affected
OctoPrint OctoPrint
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OctoPrint 提供用于控制消费级 3D 打印机的 Web 界面。在从 2.0.0rc1 到 2.0.0rc7 的版本中，已认证用户可通过向内置的 Serial Connector 插件发送连接请求，传入经过构造的默认端口或波特率。OctoPrint 会将这些值持久化保存在 或 中，并在其他用户查看已保存的连接参数时将其作为 HTML 渲染，从而允许在该用户的浏览器中执行脚本，并执行该用户 OctoPrint 访问权限范围内的操作。该问题已在 2.0.0rc7 版本中修复。

CVSS 2.4 · Low

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
OctoPrint OctoPrint >= 2.0.0rc1, < 2.0.0rc7 affected
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I. Basic Information for CVE-2026-123364

Vulnerability Information
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Vulnerability Title
OctoPrint: Stored XSS via saved connection parameters
Source: CVE Program / CVE List V5
Vulnerability Description
OctoPrint provides a web interface for controlling consumer 3D printers. From 2.0.0rc1 until 2.0.0rc7, an authenticated user can supply a crafted default port or baudrate through a connect request to the bundled Serial Connector plugin. OctoPrint persists these values in printerConnection.preferred.parameters.port or printerConnection.preferred.parameters.baudrate and renders them as HTML when another user views the saved connection parameters, allowing script execution in that user's browser and actions within the user's OctoPrint access. This issue is fixed in version 2.0.0rc7.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
OctoPrint OctoPrint >= 2.0.0rc1, < 2.0.0rc7 -

II. Public POCs for CVE-2026-123364

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-123364

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Other References for CVE-2026-123364 (3)

IV. Related Vulnerabilities

Same product: OctoPrint
Same vendor: OctoPrint
Same weakness: CWE-79