CVE-2026-3390 FascinatedBox lily Error Reporting lily_build_error.c patch_line_end out-of-bounds
A local attacker can trigger an out-of-bounds read in the lily programming language's error reporting, potentially causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-3390?
CVE-2026-3390 is a medium-severity memory corruption vulnerability in FascinatedBox lily, published on 1 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability was identified in FascinatedBox lily up to 2.3. This issue affects the function patch_line_end of the file src/lily_build_error.c of the component Error Reporting. The manipulation leads to out-of-bounds read. The attack can only be performed from a local environment. The exploit is publicly available and might be used. The project was informed of the problem early through an issue report but has not responded yet.
Which versions are affected by CVE-2026-3390?
It affects 1 product.
Products include Lily-Lang Lily.
How do I fix CVE-2026-3390?
No fix has been published for CVE-2026-3390 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-2026-3390 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3390 exists.
Other vulnerabilities in FascinatedBox lily
- CVE-2026-3391 FascinatedBox lily lily_emitter.c clear_storages out-of-bounds
- CVE-2026-3392 FascinatedBox lily lily_emitter.c eval_tree null pointer dereference
- CVE-2026-2660 FascinatedBox lily lily_symtab.c shorthash_for_name use after free
- CVE-2026-2662 FascinatedBox lily lily_emitter.c count_transforms out-of-bounds
Sources
Also known as GHSA-grfq-fj8g-fxq5.