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CVE-2026-41178— OpenTelemetry-Go's baggage parsing no longer caps raw header length

Quick assessment

Affected
open-telemetry go.opentelemetry.io/otel/baggage
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenTelemetry-Go是OpenTelemetry - CNCF开源的一个开发者工具包。 OpenTelemetry-Go 1.41.0版本和1.43.0版本存在安全漏洞，该漏洞源于移除原始长度拒绝导致Parse处理任意大的标头，可能导致拒绝服务。

CVSS 5.3 · Medium EPSS 0.34% · P25

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 4

VendorProduct Version RangeStatus
open-telemetry go.opentelemetry.io/otel/baggage = 1.41.0 affected
= 1.43.0 affected
open-telemetry go.opentelemetry.io/otel/propagation = 1.41.0 affected
= 1.43.0 affected
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I. Basic Information for CVE-2026-41178

Vulnerability Information
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Vulnerability Title
OpenTelemetry-Go's baggage parsing no longer caps raw header length
Source: CVE Program / CVE List V5
Vulnerability Description
OpenTelemetry-Go is the Go implementation of OpenTelemetry. Versions 1.41.0 and 1.43.0 removed raw-length rejection and it causes `Parse` to process arbitrarily large/invalid baggage headers and log errors, enabling DoS via oversized inputs. Versions 1.42.0 and 1.44.0 fix the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的内存分配
Source: CVE Program / CVE List V5
Vulnerability Title
OpenTelemetry-Go 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenTelemetry-Go是OpenTelemetry - CNCF开源的一个开发者工具包。 OpenTelemetry-Go 1.41.0版本和1.43.0版本存在安全漏洞，该漏洞源于移除原始长度拒绝导致Parse处理任意大的标头，可能导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
open-telemetry go.opentelemetry.io/otel/baggage = 1.41.0 -
open-telemetry go.opentelemetry.io/otel/propagation = 1.41.0 -

II. Public POCs for CVE-2026-41178

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III. Intelligence Information for CVE-2026-41178

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Vendor Advisories for CVE-2026-41178 (1)

IV. Related Vulnerabilities

Same vendor: open-telemetry
Same weakness: CWE-789

V. Comments for CVE-2026-41178

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