CVE-2026-87779
Received Received - Intake

Sensitive Information Logged in Apache Syncope

Publication date: 2026-09-14

Last updated on: 2026-09-14

Assigner: Apache Software Foundation

Description
Insertion of sensitive information into log file vulnerability in Apache Syncope. When AES key of non-standard length (not 16/24/32 bytes) is configured, Syncope will pad the provided value with random characters. The resulting key value is logged. This issue affects Apache Syncope: from 3.0.15 through 3.0.16, from 4.0.3 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
2026-09-14
AI Q&A
2026-09-14
EPSS Evaluated
N/A
NVD
CVE-2026-87779
EUVD
EUVD-2026-77372

Affected Vendors & Products

Showing 5 associated CPEs
Vendor Product Version / Range
apache syncope From 3.0.15 (inc) to 3.0.16 (inc)
apache syncope From 4.0.3 (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

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-532 The product writes sensitive information to a log file.

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Executive Summary

This vulnerability involves Apache Syncope logging sensitive AES encryption keys when non-standard key lengths are used. The system pads these keys with random characters, and the full padded key is recorded in logs, potentially exposing cryptographic secrets.

Detection Guidance

Check Apache Syncope logs for AES keys that appear padded with random characters. Look for keys not matching standard lengths (16/24/32 bytes). Review configuration files for non-standard AES key values.

Impact Analysis

If exploited, attackers could access logged AES keys, decrypt sensitive data, or impersonate users. This could lead to unauthorized access to systems, data breaches, or compliance violations depending on the data processed by Syncope.

Compliance Impact

This vulnerability could violate GDPR (data protection) and HIPAA (health data security) by exposing sensitive information in logs. Organizations may face fines or penalties for failing to protect personal or health data due to improper key handling.

Mitigation Strategies

Upgrade Apache Syncope to version 4.0.8 or 4.1.3 or later. Replace any non-standard AES keys with standard-length keys (16/24/32 bytes). Review and sanitize logs containing sensitive key information.

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