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Vulnerabilities CVE-2026-29181

CVE-2026-29181

High
Open
TLP:CLEAR

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

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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.

Details

CVSS Score
7.5
EPSS Score
0.57%

44.3th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Confidence
90%
Published
Apr 7, 2026
Last Modified
Aug 12, 2026
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