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 inputs. Versions 1.42.0 and 1.44.0 fix the issue.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.003 (24.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 24.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
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
- Opentelemetry — versions 1.43.0
Weakness classification (CWE)
References
- github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-5wrp-cwcj-q… (Patch, Issue Tracking, Vendor Advisory)
- github.com/open-telemetry/opentelemetry-go/pull/7880 (Patch, Issue Tracking)
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.