GHSA-mvpq-2v8x-ww6g (CVE-2026-23886)

Details

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

https://github.com/swift-otel/swift-w3c-trace-context/commit/5da9b143ba6046734de3fa51dafea28290174e4e

Workarounds

Disable either Swift OTel or the code that extracts the trace information from an incoming header (such as a TracingMiddleware).

References

Swift W3C TraceContext 1.0.0-beta.5 Swift OTel 1.0.4

Affected Packages

github.com/swift-otel/swift-otel

SwiftURL

Fixed in:

1.0.4

github.com/swift-otel/swift-w3c-trace-context

SwiftURL

Fixed in:

1.0.0-beta.5

References

ADVISORY

https://github.com/advisories/GHSA-mvpq-2v8x-ww6g

WEB

https://github.com/swift-otel/swift-otel/releases/tag/1.0.4

PACKAGE

https://github.com/swift-otel/swift-w3c-trace-context

WEB

https://github.com/swift-otel/swift-w3c-trace-context/commit/5da9b143ba6046734de3fa51dafea28290174e4e

WEB

https://github.com/swift-otel/swift-w3c-trace-context/releases/tag/1.0.0-beta.5

WEB

https://github.com/swift-otel/swift-w3c-trace-context/security/advisories/GHSA-mvpq-2v8x-ww6g

ADVISORY

https://nvd.nist.gov/vuln/detail/CVE-2026-23886