REDHAT-BUG-2456252: High severity OpenTelemetry OpenTelemetry-Go vulnerability

Published Apr 7, 2026
·
Updated

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.

Affected Software

1 affected component
OpenTelemetry OpenTelemetry-Go>=1.36.0<=1.40.0

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade opentelemetry-go to a version that resolves this vulnerability.

    Fixed in 1.41.0

Event History

Apr 7, 2026
Data Sourced
via Red Hat·09:01 PM
DescriptionSeverityAffected Software
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Frequently Asked Questions

1

What is the severity of REDHAT-BUG-2456252?

The severity of REDHAT-BUG-2456252 is high, rated at 7.

2

How do I fix REDHAT-BUG-2456252?

To fix REDHAT-BUG-2456252, upgrade OpenTelemetry-Go to version 1.41.0 or later.

3

What impact does REDHAT-BUG-2456252 have?

REDHAT-BUG-2456252 can lead to CPU and memory amplification attacks when multiple baggage header lines are sent.

4

What versions are affected by REDHAT-BUG-2456252?

REDHAT-BUG-2456252 affects OpenTelemetry-Go versions from 1.36.0 to 1.40.0.

5

Is REDHAT-BUG-2456252 an exploited vulnerability?

As of now, there are no known active exploits for REDHAT-BUG-2456252.

Contact

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