# CVE-2026-3392: FascinatedBox lily lily_emitter.c eval_tree null pointer dereference

> A local attacker can cause a denial of service via null pointer dereference in the Lily programming language library.

- **Severity:** Medium 4.8 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 1 Mar 2026
- **Updated:** 2 Mar 2026
- **Also known as:** GHSA-wjxq-hxc4-r33w

## What is CVE-2026-3392?

CVE-2026-3392 is a medium-severity 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 weakness has been identified in FascinatedBox lily up to 2.3. The affected element is the function eval_tree of the file src/lily_emitter.c. This manipulation causes null pointer dereference. The attack is restricted to local execution. The exploit has been made available to the public and could be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.

Weakness: CWE-476 (NULL Pointer Dereference), CWE-404 (Improper Resource Shutdown or Release)

## Which versions are affected by CVE-2026-3392?

It affects 1 product.


Products: Lily-Lang Lily.

## How do I fix CVE-2026-3392?

No fix published yet.

## Is CVE-2026-3392 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3392 exists.

## Other vulnerabilities in FascinatedBox lily

- [CVE-2026-3390](https://insights.sbomify.com/CVE-2026-3390/): FascinatedBox lily Error Reporting lily_build_error.c patch_line_end out-of-bounds (medium 4.8)
- [CVE-2026-3391](https://insights.sbomify.com/CVE-2026-3391/): FascinatedBox lily lily_emitter.c clear_storages out-of-bounds (medium 4.8)
- [CVE-2026-2660](https://insights.sbomify.com/CVE-2026-2660/): FascinatedBox lily lily_symtab.c shorthash_for_name use after free (medium 4.8)
- [CVE-2026-2662](https://insights.sbomify.com/CVE-2026-2662/): FascinatedBox lily lily_emitter.c count_transforms out-of-bounds (medium 4.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-3392 and fix it if it is affected.

What it is: CVE-2026-3392 is a medium-severity 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.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3392 exists.

Affected product: FascinatedBox lily. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-3392/ (Markdown: https://insights.sbomify.com/CVE-2026-3392/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-3392
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-3392
- OSV: https://osv.dev/vulnerability/CVE-2026-3392

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-3392/
Summaries are generated and may contain mistakes; the official description above is the record.