Allocation of Resources Without Limits or Throttling Affecting github.com/swift-otel/swift-w3c-trace-context package, versions <1.0.0-beta.5
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published21 Jan 2026
- disclosed21 Jan 2026
- creditHonza Dvorsky
Introduced: 21 Jan 2026
CVE-2026-23886 (opens in a new tab)How to fix?
Upgrade swift-otel/swift-w3c-trace-context to version 1.0.0-beta.5 or higher.
Overview
swift-otel/swift-w3c-trace-context is a Micro-library exposing the W3C Trace-Context as a Swift struct
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling due to improper input validation. An attacker can cause a crash of the service by sending a specially crafted malformed HTTP header from the network.
Workaround
This vulnerability can be mitigated by disabling either Swift OTel or the code that extracts the trace information from an incoming header (such as a TracingMiddleware).