CVE-2026-29181
OpenTelemetry-Go: multi-value `baggage` header extraction causes excessive allocations (remote dos amplification)
7.5
HIGH
CVSS 3.1
EPSS 0.08%
Description
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.
How to fix CVE-2026-29181
To remediate CVE-2026-29181, upgrade the affected package to a fixed version below.
- —no fix listed
- —upgrade to 1.41.0 or later
Is CVE-2026-29181 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0
- >= 1.36.0, < 1.41.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |