CVE-2026-23750 Golioth Pouch (prior to commit 1b2219a1) BLE GATT Heap-based Buffer Overflow
An adjacent attacker can cause a heap overflow and potential code execution in Golioth Pouch by sending oversized BLE GATT certificate fragments.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-23750?
CVE-2026-23750 is a high-severity memory corruption vulnerability in Golioth Pouch, published on 26 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Weakness: CWE-122
Which versions are affected by CVE-2026-23750?
How do I fix CVE-2026-23750?
No fix has been published for CVE-2026-23750 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-23750 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-23750 exists.
Sources
Also known as GHSA-xcg8-xp62-9p7g.