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    CVE-2026-29181

    OpenTelemetry-Go is the Go implementation of OpenTelemetry. From 1.36.0 to 1.40.0, multi-value baggage: header extraction parses each header field-value independently and aggregates members across values. This allows an attacker to amplify cpu and allocations by sending many baggage: header lines, even when each individual value is within the 8192-byte per-value parse limit. This vulnerability is fixed in 1.41.0.

    Published:Apr 7, 2026
    Last Modified:Sep 9, 2026
    EPS:Apr 7, 2026
    EPSS Score:0.00669
    CVSS Score:7.5

    Affected Products

    Vendor
    Opentelemetry
    Product
    Opentelemetry
    Vendor
    Opentelemetry
    Product
    Opentelemetry-go

    Exploits

    https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-mh2q-q3fh-2475

    Related CVEs

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    CVE-2026-41078 (CVSS 5.9) — OpenTelemetry dotnet is a dotnet telemetry framework. In 1.6.0-rc.1 and earlier, OpenTelemetry.Exporter.Jaeger…
    CVE-2026-40894 (CVSS 5.3) — OpenTelemetry dotnet is a dotnet telemetry framework. In OpenTelemetry.Api 0.5.0-beta.2 to 1.15.2 and OpenTele…
    CVE-2026-40891 (CVSS 5.3) — OpenTelemetry dotnet is a dotnet telemetry framework. From 1.13.1 to before 1.15.2, When exporting telemetry o…
    CVE-2026-40182 (CVSS 5.3) — OpenTelemetry dotnet is a dotnet telemetry framework. From 1.13.1 to before 1.15.2, When exporting telemetry t…
    CVE-2026-39883 (CVSS 7.3) — OpenTelemetry-Go is the Go implementation of OpenTelemetry. From 1.15.0 to 1.42.0, the fix for CVE-2026-24051 …
    CVE-2026-39882 (CVSS 5.3) — OpenTelemetry-Go is the Go implementation of OpenTelemetry. Prior to 1.43.0, the otlp HTTP exporters (traces/m…
    CVE-2026-24051 (CVSS 7) — OpenTelemetry-Go is the Go implementation of OpenTelemetry. The OpenTelemetry Go SDK in version v1.20.0-1.39.0…
    CVE-2024-36129 (CVSS 8.2) — The OpenTelemetry Collector offers a vendor-agnostic implementation on how to receive, process and export tele…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High