CVE-2026-23886

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Source

https://cve.org/CVERecord?id=CVE-2026-23886

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23886.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-23886

Aliases

GHSA-mvpq-2v8x-ww6g

Published

2026-01-19T21:01:52.694Z

Modified

2026-01-28T05:52:45.233716Z

Severity

5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator

Summary

Swift W3C TraceContext has malformed HTTP header that can cause a crash

Details

Swift W3C TraceContext is a Swift implementation of the W3C Trace Context standard, and Swift OTel is an OpenTelemetry Protocol (OTLP) backend for Swift Log, Swift Metrics, and Swift Distributed Tracing. Prior to Swift W3C TraceContext version 1.0.0-beta.5 and Swift OTel version 1.0.4, a denial-of-service vulnerability due to improper input validation allows a remote attacker to crash the service via a malformed HTTP header. This 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. Version 1.0.0-beta.5 of Swift W3C TraceContext and version 1.0.4 of Swift OTel contain a patch for this issue. As a workaround, disable either Swift OTel or the code that extracts the trace information from an incoming header (such as a TracingMiddleware).

Database specific

{
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23886.json",
    "cwe_ids": [
        "CWE-20"
    ]
}

References

Affected packages

Git / github.com/swift-otel/swift-otel

Affected ranges

Type: GIT
Repo: https://github.com/swift-otel/swift-otel
Events: Introduced

0 Unknown introduced commit / All previous commits are affected

Fixed

b5f4d8b3ec75c63bf85526b6ff3789b6de0d54a1

Affected versions

0.*

0.1.0

0.1.1

0.10.0

0.10.1

0.11.0

0.12.0

0.2.0

0.3.0

0.4.0

0.5.0

0.6.0

0.7.0

0.8.0

0.9.0

1.*

1.0.0

1.0.0-alpha.1

1.0.0-alpha.2

1.0.0-beta.1

1.0.0-rc.1

1.0.1

1.0.2

1.0.3

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23886.json"

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