GHSA-5rfv-66g4-jr8h is a high-severity (CVSS 7.5) Information Exposure vulnerability in restrictedpython. 1 public exploit reference exists, so weaponization risk is real. O3 Security confirms whether GHSA-5rfv-66g4-jr8h is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
RestrictedPython information leakage via `AttributeError.obj` and the `string` module
Real-World Exposure
restrictedpythonReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.
Description
Impact
A user can gain access to protected (and potentially sensible) information indirectly via AttributeError.obj and the string module.
Patches
The problem will be fixed in version 7.3.
Workarounds
If the application does not require access to the module string, it can remove it from RestrictedPython.Utilities.utility_builtins or otherwise do not make it available in the restricted execution environment.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | restrictedpython | all versions | 7.3 |
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 restrictedpython. 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.
Fix
Update restrictedpython to 7.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-5rfv-66g4-jr8h is resolved across your whole dependency graph.
Workarounds
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-5rfv-66g4-jr8h 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-5rfv-66g4-jr8h. 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-5rfv-66g4-jr8h in your dependencies?
O3 detects GHSA-5rfv-66g4-jr8h across PyPI dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.