GHSA-4rhq-vq24-88gw — grpc-swift
GHSA-4rhq-vq24-88gw is a CWE-674 vulnerability in github.com/grpc/grpc-swift. A fix is available for github.com/grpc/grpc-swift — see the affected versions and patch details below.
Uncontrolled Recursion in HTTP2ToRawGRPCServerCodec
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
Real-World Exposure
github.com/grpc/grpc-swiftReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects SwiftURL packages — download data is not available via public APIs for these ecosystems.
Description
Impact
Affected gRPC Swift servers are vulnerable to uncontrolled recursion and stack consumption when parsing certain payloads. This may lead to a denial of service.
Patches
The problem has been fixed in 1.2.0.
Workarounds
No workaround is available. Users must upgrade.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦SwiftURL | github.com/grpc/grpc-swift | all versions | 1.2.0 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/grpc/grpc-swift, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/grpc/grpc-swift to 1.2.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-4rhq-vq24-88gw 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-4rhq-vq24-88gw can be triaged on real exposure rather than presence alone.
Tailored to GHSA-4rhq-vq24-88gw. 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-4rhq-vq24-88gw in your dependencies?
O3 Security finds GHSA-4rhq-vq24-88gw across SwiftURL dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.