CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2026-29181
High (7.5) in opentelemetry opentelemetry. EPSS 0.8% chance of exploitation in the next 30 days. Fixed in go.opentelemetry.io/otel 1.41.0.
OpenTelemetry-Go is the Go implementation of OpenTelemetry. From 1.36.0 to 1.40.0, multi-value baggage: header extraction parses each header field-value independently and aggregates members across values. This allows an attacker to amplify cpu and allocations by sending many baggage: header lines, even when each individual value is within the 8192-byte per-value parse limit. This vulnerability is fixed in 1.41.0.
Severity
- EPSS
- 0.8% chance of exploitation in the next 30 days; higher than 56% of CVEs (scores of 2026-10-31)
- CWE
- CWE-770
- Published
- Modified
- Record from
- the NVD, synced
Affected
- opentelemetry:opentelemetry
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-mh2q-q3fh-2475 | Go | go.opentelemetry.io/otel | >=1.36.0 <1.41.0 | 1.41.0 |
| GO-2026-5506 | Go | go.opentelemetry.io/otel | >=1.36.0 <1.41.0 | 1.41.0 |