# CVE-2026-59644

## Summary

- **CVE ID:** CVE-2026-59644
- **Severity:** HIGH
- **CVSS Score:** 8.7 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/U:Amber)
- **CWE:** CWE-834
- **Published:** Aug 3, 2026
- **Last Modified:** Aug 3, 2026

## Description

In Bouncy Castle for Java before 1.85, MLS hash-ratchet honours arbitrary 32-bit generation counter from sender.

## Affected Products

- Legion of the Bouncy Castle Inc. — BC-JAVA (1.73)

## References

- [CNA](https://github.com/bcgit/bc-java/wiki/CVE-2026-59644)
- [CNA](https://github.com/bcgit/bc-java/commit/610d8757d855afe197df0de6d831cb75c81e3b9f)
- [CNA](https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9059644)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.31%
- **EPSS Percentile:** 23.6

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._