CVE-2026-3385 wren-lang wren wren_compiler.c resolveLocal recursion
An attacker with local access can cause a denial of service in the Wren compiler via uncontrolled recursion in resolveLocal.
- 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-2026-3385?
CVE-2026-3385 is a medium-severity denial of service vulnerability in wren-lang wren, 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 detected in wren-lang wren up to 0.4.0. Affected is the function resolveLocal of the file src/vm/wren_compiler.c. The manipulation results in uncontrolled recursion. Attacking locally is a requirement. The exploit is now public and may 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-2026-3385?
It affects 1 product.
Products include Wren Wren.
How do I fix CVE-2026-3385?
No fix has been published for CVE-2026-3385 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-3385 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3385 exists.
Other vulnerabilities in wren-lang wren
- CVE-2026-3386 wren-lang wren wren_compiler.c emitOp out-of-bounds
- CVE-2026-3387 wren-lang wren wren_compiler.c getByteCountForArguments null pointer dereference
- CVE-2026-2858 wren-lang wren Source File wren_compiler.c peekChar out-of-bounds
- CVE-2026-2657 wren-lang wren Error Message wren_compiler.c printError stack-based overflow
Sources
Also known as GHSA-7997-f766-56h6.