GHSA-gq4p-4hxv-5rg9
MEDIUMGHSA-gq4p-4hxv-5rg9 is a medium-severity (CVSS 5.5) Out-of-bounds Read vulnerability in wasm3. 1 public exploit reference exists, so weaponization risk is real. O3 Security confirms whether GHSA-gq4p-4hxv-5rg9 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
WASM3 segmentation fault
Real-World Exposure
wasm3🐍pywasm3Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects crates.io, PyPI packages — download data is not available via public APIs for these ecosystems.
Description
WASM3 v0.5.0 was discovered to contain a segmentation fault via the component Compile_Memory_CopyFill.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🦀crates.io | wasm3 | all versions | No fix |
| 🐍PyPI | pywasm3 | all versions | No fix |
Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for wasm3. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Remediation status
No patched version of wasm3 has shipped for GHSA-gq4p-4hxv-5rg9 yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.
Mitigate without a patch
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-gq4p-4hxv-5rg9 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-gq4p-4hxv-5rg9. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-gq4p-4hxv-5rg9 in your dependencies?
O3 detects GHSA-gq4p-4hxv-5rg9 across crates.io, PyPI dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.