CVE-2026-97155Network attack vector

Unauthorized local actions via unrestricted web origins

Published Sep 24, 2026 · Updated Sep 24, 2026

Origin validation failure in Fabasoft Folio Client before 2026 allows remote attackers to invoke local client functions from any website. An empty optional VALIDDOMAINS policy causes the native messaging bridge to trust every web origin instead of allowlisting approved domains. A user must visit an attacker-controlled site with the client and browser extension installed, exposing document download, opening, and file synchronization actions.

CVSS severityUnavailable
Unscored
EPSS probability0.11%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Origin validation failure in Fabasoft Folio Client before 2026 allows remote attackers to invoke local client functions from any website. An empty optional VALIDDOMAINS policy causes the native messaging bridge to trust every web origin instead of allowlisting approved domains. A user must visit an attacker-controlled site with the client and browser extension installed, exposing document download, opening, and file synchronization actions.

The record

CVE
CVE-2026-97155
Published
Sep 24, 2026
Updated
Sep 24, 2026
Vendor
Fabasoft
Product
Fabasoft Folio Client
Classifications
T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2026

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Fabasoft · Fabasoft Folio Clientversion=0 <2026

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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