Buffer overflow in Golioth Pouch
CVE-2026-23750
Golioth Pouch version 0.1.0, prior to commit 1b2219a1, contains a heap-based buffer overflow in BLE GATT server certificate handling. server_cert_write() allocates a heap buffer of size CONFIG_POUCH_SERVER_CERT_MAX_LEN when receiving the first fragment, then appends subsequent fragments using memcpy() without verifying that sufficient capacity remains. An adjacent BLE client can send unauthenticated fragments whose combined size exceeds the allocated buffer, causing a heap overflow and crash; integrity impact is also possible due to memory corruption.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (3.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 3.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.000
Affected products
- Golioth Pouch — versions 0.1.0, 1b2219a159bcbef3f37caa303bbf14d14e979c11
Weakness classification (CWE)
References
- secmate.dev/disclosures/SECMATE-2025-0018 (technical-description)
- blog.secmate.dev/posts/golioth-vulnerabilities-disclosure/ (technical-description, exploit)
- github.com/golioth/pouch/commit/1b2219a1 (patch)
- www.vulncheck.com/advisories/golioth-pouch-ble-gatt-heap-based-buffer-overflow (third-party-advisory)
Frequently asked questions
- What is CVE-2026-23750?
- CVE-2026-23750 is a high-severity vulnerability in Golioth Pouch, classified under Heap-based Buffer Overflow. CVSS score: 8.1/10. Published 2026-02-26.
- How severe is CVE-2026-23750?
- High severity. CVSS v3 base score is 8.1 out of 10.