CVE-2026-29181 HIGH

CVE-2026-29181: OpenTelemetry-Go multi-value `baggage` header extraction causes excessive allocations (remote dos amplification)

Vendor Open-Telemetry
Product opentelemetry-go
Weakness CWE-770 · Uncontrolled resource consumption
Published April 7, 2026
Last update June 30, 2026
View on NVD All CVEs

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 7, 2026 CVE published
June 30, 2026 Record updated