CVE-2026-29181
HIGHOpenTelemetry-Go multi-value `baggage` header extraction causes excessive allocations (remote dos amplification)
Title source: cnaDescription
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.
References (1)
Core 1
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-mh2q-q3fh-2475
Scores
CVSS v3
7.5
EPSS
0.0033
EPSS Percentile
24.5%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-770
Status
published
Products (5)
go.opentelemetry.io/otel
1.36.0 - 1.41.0Go
open-telemetry/opentelemetry-go
>= 1.36.0, < 1.41.0
opentelemetry/opentelemetry
1.36.0 - 1.41.0
otel/baggage
1.36.0 - 1.41.0Go
otel/propagation
1.36.0 - 1.41.0Go
Published
Apr 07, 2026
Tracked Since
Apr 08, 2026