Buffer overflow in Apache Nimble
CVE-2026-45813
Out-of-bounds Write, Integer Underflow (Wrap or Wraparound) vulnerability in Apache NimBLE BASS service. Improper validation when parsing BASS service "Add Source" and "Modify Source" operation PDU could results in stack buffer overflow or arbitrary out-of-bound read. This can be triggered by nearby devices over Bluetooth connection, however pairing is required prior to accessing BASS service, which depending on device configuration may or may not require user action. This issue affects Apache NimBLE: through 1.9.0. Users are recommended to upgrade to version 1.10.0, which fixes the issue.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (43.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 43.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Apache Nimble
- Apache Software Foundation Nimble — versions 0
Weakness classification (CWE)
References
- github.com/apache/mynewt-nimble/pull/2232 (Patch, patch, Issue Tracking)
- lists.apache.org/thread/vc1ny73w243z5wr6t0y10gc6t2c9cytw (vendor-advisory, Mailing List, Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2026-45813?
- CVE-2026-45813 is a high-severity vulnerability in Apache Nimble, classified under Integer Underflow. CVSS score: 8.8/10. Published 2026-07-24.
- How severe is CVE-2026-45813?
- High severity. CVSS v3 base score is 8.8 out of 10.