GHSA-mvpq-2v8x-ww6g
MEDIUMSwift W3C TraceContext vulnerable to a malformed HTTP header causing a crash
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.
Blast Radius
github.com/swift-otel/swift-w3c-trace-context📦github.com/swift-otel/swift-otelReal-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
A denial-of-service vulnerability due to improper input validation allows a remote attacker to crash the service via a malformed HTTP header.
Allows crashing the process with data coming from the network when used with, for example, an HTTP server. Most common way of using Swift W3C Trace Context is through Swift OTel.
Patches
Workarounds
Disable either Swift OTel or the code that extracts the trace information from an incoming header (such as a TracingMiddleware).
References
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦SwiftURL | github.com/swift-otel/swift-w3c-trace-context | all versions | 1.0.0-beta.5 |
| 📦SwiftURL | github.com/swift-otel/swift-otel | all versions | 1.0.4 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/swift-otel/swift-w3c-trace-context. 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 github.com/swift-otel/swift-w3c-trace-context to 1.0.0-beta.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-mvpq-2v8x-ww6g 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-mvpq-2v8x-ww6g 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-mvpq-2v8x-ww6g. 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-mvpq-2v8x-ww6g in your dependencies?
O3 detects GHSA-mvpq-2v8x-ww6g across SwiftURL dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.