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CVE-2026-97155

Quick assessment

Affected
Fabasoft Folio Client
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.

Fabasoft Folio Client 2026 版本之前的版本存在安全漏洞。该组件为本地安装的软件，通过网页消息机制与 Fabasoft 浏览器扩展进行通信，但默认情况下未限制哪些网页源（web origins）可以调用其功能。注册表项 VALIDDOMAINS 用于限制允许访问的网页源，但该值在默认情况下为可选且为空，导致所有域名都被信任。因此，安装了 Fabasoft Folio Client 和浏览器扩展的用户在访问任何网站时，这些网站都有可能调用客户端的功能，例如与下载文档、打开文档以及同步文件相关的

CVSS 6.5 · Medium EPSS 0.11% · P1
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I. Basic Information for CVE-2026-97155

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Fabasoft Folio Client before 2026, a locally installed component that communicates with the Fabasoft browser extension via web messaging, does not restrict which web origins may invoke its functions by default. The registry value VALIDDOMAINS, which limits permitted origins, was optional and empty by default, resulting in all domains being trusted. As a consequence, any website visited by a user with the Folio Client and browser extension installed could invoke client functions, e.g., related to downloading documents, opening documents, and synchronizing files. The first fixed builds are Fabasoft Folio Client 2026 (Build 26.0.0.10) and Fabasoft Folio Client 2026 April Release (Build 26.4.0.76). This client is, for example, shipped with Fabasoft eGov-Suite.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
源验证错误
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Fabasoft Folio Client 0 ~ 2026 -

II. Public POCs for CVE-2026-97155

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III. Intelligence Information for CVE-2026-97155

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Other References for CVE-2026-97155 (1)

IV. Related Vulnerabilities

Same weakness: CWE-346

V. Comments for CVE-2026-97155

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