# go.opentelemetry.io/otel (Go) vulnerabilities

2 known vulnerabilities (1 high, 1 medium), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: v1.47.0 (Oct 2, 2026): no advisory affects it
- Newest unaffected release: v1.47.0 (Oct 2, 2026), the latest release
- Releases: 94 since v0.1.0 (Nov 4, 2019)
- Registry: https://pkg.go.dev/go.opentelemetry.io/otel
- Releases read: Nov 8, 2026

## Version timeline

Affected versions per advisory, in version order:

- CVE-2026-41178: v1.41.0 (v1.42.0 is outside it); v1.43.0 (v1.44.0 is outside it)
- CVE-2026-29181: v1.36.0 to v1.40.0 (v1.41.0 is outside it)

## Advisories (2)

### [CVE-2026-41178](https://cve.now/CVE-2026-41178): OpenTelemetry-Go's baggage parsing no longer caps raw header length

- Severity: Medium 5.3
- Published: Jun 4, 2026
- Affected: from 1.41.0, fixed in 1.42.0; from 1.43.0, fixed in 1.44.0.
- Fixed in v1.42.0 (released Mar 6, 2026, 90 days before disclosure) and v1.44.0 (released May 27, 2026, 8 days before disclosure).
- The latest release, v1.47.0, is not affected.

### [CVE-2026-29181](https://cve.now/CVE-2026-29181): OpenTelemetry-Go multi-value \`baggage\` header extraction causes excessive allocations (remote dos amplification)

- Severity: High 7.5
- Published: Apr 7, 2026
- Affected: from 1.36.0, fixed in 1.41.0.
- Fixed in v1.41.0 (released Mar 2, 2026, 36 days before disclosure).
- The latest release, v1.47.0, is not affected.

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