EUVD-2026-77372
GHSA-2987-fvqf-8g2j
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Non-default key length required (AC:H); log read access needed (PR:L); AES key fully exposed (C:H) with no integrity or availability impact.
Primary rating from Vendor (apache).
CVSS VectorVendor: apache
Lifecycle Timeline
4DescriptionCVE.org
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.
AnalysisAI
Sensitive AES key material is written in plaintext to Apache Syncope application logs under a specific misconfiguration condition. When an operator configures an AES key whose byte length deviates from standard values (16, 24, or 32 bytes), Syncope silently pads it with random characters to reach a valid length - and then logs the resulting padded key value. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires two concurrent conditions: (1) an AES key of non-standard length (anything other than exactly 16, 24, or 32 bytes) must have been configured in the affected Syncope instance - this is a misconfiguration, not a default deployment state; and (2) the attacker must have read access to Syncope's application log files or a log aggregation system that ingests them. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | No CVSS score is provided by NVD; the following is analyst-assessed. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to Apache Syncope 4.0.8 or 4.1.3, which are confirmed to fix this issue per the vendor advisory (https://lists.apache.org/thread/3t3om8mny7ng52q053pdzpmtdtosnqoo). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Apache Syncope instances and verify which versions are deployed; search application logs and log aggregation systems for plaintext AES key material in any systems running versions prior to 4.0.8 or 4.1.3. …
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