CVE-2026-88389 Null dereference in n/a
Crafted input triggers a NULL pointer dereference in the Espruino lexer, causing memory corruption and denial of service in release builds.
- 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-2026-88389?
CVE-2026-88389 is a medium-severity vulnerability in n/a, published on 25 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Espruino 2v29 (commit bffc6d0) contains a NULL pointer dereference vulnerability in jslGetRawString() in src/jslex.c. Crafted raw/binary string input can cause the lexer to pass a NULL iterator target to jsvLockAgain(). In RELEASE/NO_ASSERT builds, the missing assertion guard allows a write through the NULL pointer, resulting in memory corruption and application termination or denial of service.
Weakness: CWE-476
Which versions are affected by CVE-2026-88389?
How do I fix CVE-2026-88389?
No fix has been published for CVE-2026-88389 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-88389 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-88389 exists.
Sources
Also known as GHSA-pp3g-9mvp-c3vm.