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CVE-2026-104657— Missing Integrity Verification in Progress Software Fiddler Download & Setup Skill

Quick assessment

Affected
Progress Software Fiddler Download & Setup Skill
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.

Progress Software 的 Fiddler 下载与安装技能（Skill）在 Linux、macOS 和 Windows 平台上缺少完整性验证，攻击者可借此篡改或影响发布组件，并在用户运行该技能时执行由攻击者控制的代码。在 macOS 上，该技能会将安装包置于可预测的路径，并以管理员权限进行安装；在用户授权后，这可能导致以 root 权限执行恶意代码。此外，在技能等待用户批准期间，本地进程还可能替换已暂存的 macOS 安装包。

CVSS 7.5 · High
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I. Basic Information for CVE-2026-104657

Vulnerability Information
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Vulnerability Title
Missing Integrity Verification in Progress Software Fiddler Download & Setup Skill
Source: CVE Program / CVE List V5
Vulnerability Description
Missing integrity verification in the Progress Software Fiddler Download and Setup Skill on Linux, macOS, and Windows which allows an attacker to compromise or influence a release component and execute attacker-controlled code when a user runs the skill. On macOS, the skill stages the package at a predictable path and installs it with administrator privileges, which may allow code execution with root privileges after user approval. A local process may also replace the staged macOS package while the skill waits for approval.
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
下载代码缺少完整性检查
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Progress Software Fiddler Download & Setup Skill 0 ~ 8.3.0 -

II. Public POCs for CVE-2026-104657

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-104657

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Other References for CVE-2026-104657 (1)

Same Patch Batch · Progress Software · 2026-11-06 · 11 CVEs total

CVE-2026-104656 7.3 HIGH Cross-site Scripting in Progress Telerik Fiddler Everywhere
CVE-2026-106135 5.4 MEDIUM Cross-Site Scripting in Progress Software Kendo UI for Angular
CVE-2026-106134 5.4 MEDIUM Cross-Site Scripting in Progress Software KendoReact
CVE-2026-106143 5.4 MEDIUM Cross-Site Scripting in Progress Software Kendo UI for Vue
CVE-2026-106136 5.4 MEDIUM Cross-Site Scripting in Progress Software KendoReact
CVE-2026-106142 5.4 MEDIUM Cross-Site Scripting in Progress Software KendoReact
CVE-2026-106141 5.4 MEDIUM Cross-Site Scripting in Progress Software Kendo UI for Angular
CVE-2026-106128 4.1 MEDIUM Prototype Pollution in Progress Software Kendo UI for Vue
CVE-2026-106144 4.1 MEDIUM Prototype Pollution in Progress Software Kendo UI for Angular
CVE-2026-106127 4.1 MEDIUM Prototype Pollution in Progress Software KendoReact

IV. Related Vulnerabilities

Same vendor: Progress Software
Same weakness: CWE-494