High · 7.5 CVE-2025-52435 EUVD-2026-1854GHSA-5c5p-g26h-xx2f

Apache Mynewt NimBLE: Invalid error handling in pause encryption procedure in NimBLE controller

Published Jan 10, 2026 · Updated Jan 12, 2026 · Assigned by apache

Vendor: Apache Software Foundation Product: Apache Mynewt NimBLE

Description

J2EE Misconfiguration: Data Transmission Without Encryption vulnerability in Apache NimBLE.

Improper handling of Pause Encryption procedure on Link Layer results in a previously encrypted connection being left in un-encrypted state allowing an eavesdropper to observe the remainder of the exchange.
This issue affects Apache NimBLE: through <= 1.8.0.

Users are recommended to upgrade to version 1.9.0, which fixes the issue.

Affected products

Vendor	Product	Affected	Fixed
Apache Software Foundation	Apache Mynewt NimBLE	≤ 1.8.0	—

References

https://github.com/apache/mynewt-nimble/commit/164f1c23c18a290908df76ed83fe848bfe4a4903 patch
https://github.com/apache/mynewt-nimble/commit/ec3d75e909fa6dcadf1836fefc4432794a673d18 patch
https://lists.apache.org/thread/ow8dzpsqfh9llfclh5fzh6z237brzc0s vendor-advisory