What is CVE-2026-41178?

CVE-2026-41178 is a medium-severity vulnerability in Open-telemetry Go.opentelemetry.io/otel/baggage, classified under CWE-789. CVSS score: 5.3/10. Published 2026-06-04.

How severe is CVE-2026-41178?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Open-telemetry Go.opentelemetry.io/otel/baggage

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 input…

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Open-telemetry Go.opentelemetry.io/otel/baggage — versions = 1.41.0, = 1.43.0
Open-telemetry Go.opentelemetry.io/otel/propagation — versions = 1.41.0, = 1.43.0

Weakness classification (CWE)

CWE-789

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-41178?: CVE-2026-41178 is a medium-severity vulnerability in Open-telemetry Go.opentelemetry.io/otel/baggage, classified under CWE-789. CVSS score: 5.3/10. Published 2026-06-04.
How severe is CVE-2026-41178?: Medium severity. CVSS v3 base score is 5.3 out of 10.