CVE-2026-73195
Deferred Deferred - Pending Action

CSV Formula Injection in Apache Syncope

Publication date: 2026-09-14

Last updated on: 2026-09-14

Assigner: Apache Software Foundation

Description
Improper Encoding or Escaping of Output vulnerability in Apache Syncope. Authenticated users can store a spreadsheet formula payload in one of their own plain attributes. When such users are included in a CSV export and the generated CSV file is opened by a spreadsheet application, the formula may be executed. This issue affects Apache Syncope: from 3.0.0-M0 through 3.0.16, from 4.0.0-M0 Through 4.0.7, from 4.1.0-M0 through 4.1.2. Users are recommended to upgrade to version 4.0.8 / 4.1.3, which fix this issue.

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Meta Information

Published
2026-09-14
Last Modified
2026-09-14
Generated
2026-09-15
AI Q&A
2026-09-14
EPSS Evaluated
N/A
NVD
CVE-2026-73195
EUVD
EUVD-2026-77475

Affected Vendors & Products

Showing 7 associated CPEs
Vendor Product Version / Range
apache syncope From 3.0.0-M0 (inc) to 3.0.16 (inc)
apache syncope From 4.0.0-M0 (inc) to 4.0.7 (inc)
apache syncope From 4.1.0-M0 (inc) to 4.1.2 (inc)
apache syncope 4.0.8
apache syncope 4.1.3
apache syncope From 3.0.0 (inc) to 3.0.16 (inc)
apache syncope From 4.0.0 (inc) to 4.0.7 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-116 The product prepares a structured message for communication with another component, but encoding or escaping of the data is either missing or done incorrectly. As a result, the intended structure of the message is not preserved.

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Executive Summary

This is an improper encoding vulnerability in Apache Syncope. Authenticated users can store a spreadsheet formula payload in their plain attributes. When these users are included in a CSV export and the file is opened in a spreadsheet application, the formula may execute, potentially leading to unintended actions.

Detection Guidance

This vulnerability involves malicious spreadsheet formula payloads stored in user attributes that execute when a CSV is opened. To detect it, inspect exported CSV files for unusual formulas or commands. Check Apache Syncope logs for suspicious attribute modifications by users. Review user profiles for plain attributes containing spreadsheet functions like =cmd|' /C calc'!A0 or similar payloads.

Impact Analysis

If exploited, this vulnerability could allow attackers to execute arbitrary spreadsheet formulas when a user opens a CSV file. This may lead to data theft, unauthorized actions, or further compromise of the system, depending on the formula payload used.

Compliance Impact

This vulnerability could lead to unauthorized data access or exfiltration, violating GDPR's data protection principles or HIPAA's confidentiality requirements. Organizations may face compliance breaches if sensitive data is compromised through this exploit.

Mitigation Strategies

Upgrade Apache Syncope to version 4.0.8 or 4.1.3 or later to fix the vulnerability. Ensure no users are included in CSV exports with malicious spreadsheet formula payloads in their attributes.

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