OpenTelemetry-Go's baggage parsing no longer caps raw header length
CVE-2026-41178

5.3MEDIUM

Key Information:

Vendor

Open-telemetry

Status
Go.opentelemetry.io/otel/baggage
Go.opentelemetry.io/otel/propagation
Vendor
CVE Published:
4 June 2026

What is CVE-2026-41178?

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.

Affected Version(s)

go.opentelemetry.io/otel/baggage = 1.41.0 = 1.41.0

go.opentelemetry.io/otel/baggage = 1.43.0 = 1.43.0

go.opentelemetry.io/otel/propagation = 1.41.0 = 1.41.0

References

https://github.com/open-telemetry/opentelemetry-go/securi...
x_refsource_CONFIRM
https://github.com/open-telemetry/opentelemetry-go/pull/7880
x_refsource_MISC

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.