CVE-2026-46452 Apache NimBLE: Mesh Proxy SAR reassembly unbounded append and unchecked failure
Attackers can cause memory pressure and unstable parsing in Apache NimBLE via improper input validation in Mesh Proxy SAR reassembly.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-46452?
CVE-2026-46452 is a medium-severity denial of service vulnerability in Apache NimBLE, published on 24 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Improper Input Validation vulnerability in Apache NimBLE in Mesh Proxy SAR reassembly could result in passing broken data toward application resulting in memory pressure and unstable parsing behavior.
This issue affects Apache NimBLE: through 1.9.0.
Users are recommended to upgrade to version 1.10.0, which fixes the issue.
Weakness: CWE-20
Which versions are affected by CVE-2026-46452?
It affects 1 product.
Products include Apache Nimble.
How do I fix CVE-2026-46452?
No fix has been published for CVE-2026-46452 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-46452 being exploited?
There is no known exploitation of CVE-2026-46452 in the wild and no public exploit code.
Other vulnerabilities in Apache NimBLE
- CVE-2026-45813 Apache NimBLE: Incorrect data validation in BASS add/modify source operation
- CVE-2025-62235 Apache Mynewt NimBLE: Incorrect handling of SMP Security Request could lead to undesirable pairing
- CVE-2026-45811 Apache NimBLE: Buffer overflow in socket HCI transport
- CVE-2026-45815 Apache NimBLE: Remote reachable assertion in ATT Read Multiple Variable Response handler
- CVE-2026-45816 Apache NimBLE: NULL pointer dereference vulnerability in SMP LTK request
Sources
Also known as GHSA-wfj4-rqg3-9346.