GHSA-w59h-378f-2frm — threadalone
GHSA-w59h-378f-2frm is a security vulnerability in threadalone. A fix is available for threadalone — see the affected versions and patch details below.
Unsound sending of non-Send types across threads in threadalone
Real-World Exposure
threadaloneReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects crates.io packages — download data is not available via public APIs for these ecosystems.
Description
Affected versions can run the Drop impl of a non-Send type on a different
thread than it was created on.
The flaw occurs when a stderr write performed by the threadalone crate fails,
for example because stderr is redirected to a location on a filesystem that is
full, or because stderr is a pipe that has been closed by the reader.
Dropping a non-Send type on the wrong thread is unsound. If used with a type
such as a pthread-based MutexGuard, the consequence is undefined
behavior. If used with Rc, there would be a data race on the
reference count, which is likewise undefined behavior.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🦀crates.io | threadalone | all versions | 0.2.1cargo update -p threadalone --precise 0.2.1 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for threadalone, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update threadalone to 0.2.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-w59h-378f-2frm 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 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-w59h-378f-2frm can be triaged on real exposure rather than presence alone.
Tailored to GHSA-w59h-378f-2frm. 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-w59h-378f-2frm in your dependencies?
O3 Security finds GHSA-w59h-378f-2frm across crates.io dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.