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CVE-2026-34164— Valtimo: Sensitive data exposure through inbox message logging in InboxHandlingService

Quick assessment

Affected
valtimo-platform valtimo
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.

Valtimo是荷兰Valtimo开源的一个业务流程自动化的低代码平台。 Valtimo 13.21.0及之前版本存在安全漏洞，该漏洞源于InboxHandlingService以INFO级别记录所有传入收件箱消息的完整内容，可能导致包含个人数据、公民标识符和案件详情等高度敏感信息泄露。

CVSS 4.9 · Medium EPSS 0.37% · P29

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2026-34164

Vulnerability Information
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Vulnerability Title
Valtimo: Sensitive data exposure through inbox message logging in InboxHandlingService
Source: CVE Program / CVE List V5
Vulnerability Description
Valtimo is an open-source business process automation platform. In versions 13.0.0 through 13.21.0, the InboxHandlingService logs the full content of every incoming inbox message at INFO level. Inbox messages can contain highly sensitive information including personal data (PII), citizen identifiers (BSN), and case details. This data is exposed to anyone with access to application logs or any Valtimo user with the admin role through the Admin UI logging module. This issue has been fixed in version 13.22.0. If developers are unable to upgrade immediately, they can restrict access to application logs and adjust the log level for com.ritense.inbox to WARN or higher in their application configuration as a workaround.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过日志文件的信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Valtimo 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Valtimo是荷兰Valtimo开源的一个业务流程自动化的低代码平台。 Valtimo 13.21.0及之前版本存在安全漏洞，该漏洞源于InboxHandlingService以INFO级别记录所有传入收件箱消息的完整内容，可能导致包含个人数据、公民标识符和案件详情等高度敏感信息泄露。
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
valtimo-platform valtimo >= 13.0.0.RELEASE, < 13.22.0.RELEASE -

II. Public POCs for CVE-2026-34164

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III. Intelligence Information for CVE-2026-34164

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Patches & Fixes for CVE-2026-34164 (2)

Vendor Advisories for CVE-2026-34164 (1)

Other References for CVE-2026-34164 (1)

IV. Related Vulnerabilities

Same product: valtimo
Same vendor: valtimo-platform
Same weakness: CWE-532

V. Comments for CVE-2026-34164

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