What’s Vulnerable › Vulnerabilities

CVE-2026-46452: Apache NimBLE: Mesh Proxy SAR reassembly unbounded append and unchecked failure

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-24 · updated 2026-10-24
• Weakness: CWE-20

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.

Affected products

• Apache Software Foundation Apache NimBLE: before 1.10.0 — fixed in 1.10.0

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache NimBLE 1.10.0. Check the vendor advisory for mitigations.

References

• https://github.com/apache/mynewt-nimble/commit/593f95227a4073efde840a9bb34614929dfa7ed1
• https://lists.apache.org/thread/ym80ogxj3398khvxxogxroz4gvgw3ssg
• http://www.openwall.com/lists/oss-security/2026/07/24/16

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