---
id: CVE-2026-45404
title: OpenTelemetry-Go is the Go implementation of OpenTelemetry
summary: >-
  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 fo…
severity: medium
cwe:
  - CWE-362
  - CWE-667
vendor: otel
product: go.opentelemetry.io/otel/bridge/opentracing
affected:
  - 'go.opentelemetry.io/otel/bridge/opentracing >= 0.11.0, < 1.45.0'
patched:
  - go.opentelemetry.io/otel/bridge/opentracing 1.45.0
published: '2026-08-24'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T21:06:39.057'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-45404'
references:
  - url: >-
      https://github.com/open-telemetry/opentelemetry-go/commit/93a693edeed0e07ce5ebd1dfe67af42d1e2055d8
    label: security-advisories@github.com
  - url: 'https://github.com/open-telemetry/opentelemetry-go/pull/8693'
    label: security-advisories@github.com
  - url: 'https://github.com/open-telemetry/opentelemetry-go/releases/tag/v1.45.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-42cj-99w8-cp2p
    label: security-advisories@github.com
  - url: >-
      https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-42cj-99w8-cp2p
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://github.com/advisories/GHSA-42cj-99w8-cp2p'
  - url: 'https://github.com/open-telemetry/opentelemetry-go'
tags:
  - nvd
  - ghsa
  - go
  - osv
epss: 0.00131
epssPercentile: 0.03101
aliases:
  - GHSA-42cj-99w8-cp2p
  - GO-2026-6258
ecosystem: go
ingestedAt: '2026-08-20T17:59:05.983Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-45404)

Affected packages:

- `go.opentelemetry.io/otel/bridge/opentracing >= 0.11.0, < 1.45.0`

Patched in:

- `go.opentelemetry.io/otel/bridge/opentracing 1.45.0`

Source: https://github.com/advisories/GHSA-42cj-99w8-cp2p