CVE-2026-41178
Medium
Description
OpenTelemetry-Go is the Go implementation of OpenTelemetry. Versions 1.41.0 and 1.43.0 removed raw-length rejection and it causes `Parse` to process arbitrarily large/invalid baggage headers and log errors, enabling DoS via oversized inputs. Versions 1.42.0 and 1.44.0 fix the issue.
SeverityMedium
CVSS5.3
Exploit probability—
Product
Opentelemetry
PublishedJun 4, 2026
First seenJun 4, 2026
Weakness typeCWE-789CWE-789
How to fix
Update
- opentelemetry opentelemetry1.42.0 or later
- go.opentelemetry.io/otel/baggage1.42.0, 1.44.0 or later
- go.opentelemetry.io/otel/propagation1.42.0, 1.44.0 or later
- go.opentelemetry.io/otel1.42.0, 1.44.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| opentelemetry opentelemetry | v < 1.42.0, 1.43.0 | 1.42.0 |
| go.opentelemetry.io/otel/baggageGo | 1.41.0 ≤ v < 1.42.0, 1.43.0 ≤ v < 1.44.0 | 1.42.0, 1.44.0 |
| go.opentelemetry.io/otel/propagationGo | 1.41.0 ≤ v < 1.42.0, 1.43.0 ≤ v < 1.44.0 | 1.42.0, 1.44.0 |
| go.opentelemetry.io/otelGo | 1.41.0 ≤ v < 1.42.0, 1.43.0 ≤ v < 1.44.0 | 1.42.0, 1.44.0 |
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