CVE-2026-45404 MEDIUM

CVE-2026-45404: OpenTelemetry-Go: Unsynchronized baggage map can panic under concurrent access

Vendor Open-Telemetry
Product opentelemetry-go
Weakness CWE-362
Published August 24, 2026
Last update August 27, 2026

CVSS base score

5.9/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

OpenTelemetry-Go is the Go implementation of OpenTelemetry. From version 0.11.0 through 1.44.0, the OpenTracing bridge's bridgeSpan contains an unsynchronized extraBaggageItems map which can cause a panic. Because Go maps are not safe for concurrent read/write access, concurrent SetBaggageItem and correlation.MapFromContext calls on the same hooked bridgeSpan can trigger a fatal runtime error—such as concurrent map read and map write or concurrent map iteration and map write—terminating the process and causing denial of service. This issue is fixed in version 1.45.0.

Key dates

02Disclosure timeline

August 24, 2026 CVE published
August 27, 2026 Record updated

Related vulnerabilities

04Related CVE