# CVE-2026-45813: Apache NimBLE stack overflow in BASS service

Source: https://junglewise.ai/threats/cve-2026-45813-apache-nimble-stack-overflow-in-bass-service  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-24. Updated: 2026-07-24  
License: CC BY 4.0 with a link back

CVE-2026-45813 · Severity: info · CVSS 0 · Published 2026-07-24

Apache NimBLE is an open-source Bluetooth Low Energy (BLE) stack. A vulnerability in its Broadcast Audio Scan Service (BASS) could allow a nearby attacker to crash a device or potentially read sensitive memory. To exploit this, an attacker must be within Bluetooth range and successfully pair with the target device, which may or may not require user interaction depending on the device's security settings.

Technologies: [Apache Software Foundation NimBLE](https://junglewise.ai/threats/technologies/nimble). Vendors: [Apache Software Foundation](https://junglewise.ai/threats/vendors/apache-software-foundation).

## Quick answers

**Is CVE-2026-45813 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-45813 being exploited in the wild.

**How severe is CVE-2026-45813?** Informational severity, with a CVSS score of 0, published 24 July 2026.

**Which products and versions are affected?** Apache Software Foundation NimBLE through 1.9.0.

**Is there a fix for CVE-2026-45813?** A patch was published on 2026-05-15: Fixes merged into master branch Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-45813 attacked?** It is attacked from the adjacent network, in a software library.

**Am I affected by CVE-2026-45813?** Check whether you run Apache Software Foundation NimBLE at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

An integer underflow and out-of-bounds write vulnerability exists in the Apache NimBLE BASS (Broadcast Audio Scan Service) implementation. The flaw is rooted in improper validation of Protocol Data Units (PDUs) during 'Add Source' and 'Modify Source' operations, specifically when parsing the number of subgroups. An attacker within Bluetooth range can trigger a stack-based buffer overflow or an arbitrary out-of-bounds read by sending a specially crafted PDU. While the attack requires a Bluetooth connection and prior pairing, the impact includes potential remote code execution or information disclosure. The issue is addressed in version 1.10.0.

## Affected products

- Apache Software Foundation NimBLE through 1.9.0

## Timeline

- 2026-05-15: patched: Fixes merged into master branch
- 2026-07-24: disclosed: CVE published

## References

- [https://github.com/apache/mynewt-nimble/pull/2232](https://github.com/apache/mynewt-nimble/pull/2232)
- [https://lists.apache.org/thread/vc1ny73w243z5wr6t0y10gc6t2c9cytw](https://lists.apache.org/thread/vc1ny73w243z5wr6t0y10gc6t2c9cytw)

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