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CVE-2026-55701— OpenTelemetry githubreceiver silently ignores configured required_headers authentication

Quick assessment

Affected
open-telemetry opentelemetry-collector-contrib
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 Collector Contrib 仓库包含了 OpenTelemetry Collector 的组件。在 0.151.0 版本之前，githubreceiver 在启动时会对 中的 配置进行校验，但 中的 函数在处理传入的 webhook 请求时，并未检查这些请求头。因此，未认证的发送方可以绕过运营者配置的 认证机制，并提交任意的 webhook 负载。当 字段为空时， 也会跳过 HMAC 校验，导致 webhook 端点缺少任一已配置的认证机制。成功利用该漏洞可向可观测性管道中注入伪

CVSS 6.9 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-55701

Vulnerability Information
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Vulnerability Title
OpenTelemetry githubreceiver silently ignores configured required_headers authentication
Source: CVE Program / CVE List V5
Vulnerability Description
The OpenTelemetry Collector Contrib repository contains components for the OpenTelemetry Collector. Prior to 0.151.0, the githubreceiver validates the receiver/githubreceiver/config.go RequiredHeaders configuration at startup, but receiver/githubreceiver/trace_receiver.go handleReq() does not check those headers on incoming webhook requests. An unauthenticated sender can therefore bypass an operator's required_headers authentication control and submit arbitrary webhook payloads. When the Secret field is empty, github.ValidatePayload also skips HMAC validation, leaving the webhook endpoint without either configured authentication mechanism. Successful exploitation can inject fabricated CI/CD trace data into the observability pipeline. This issue is fixed in version 0.151.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
open-telemetry opentelemetry-collector-contrib < 0.151.0 -
open-telemetry github.com/open-telemetry/opentelemetry-collector-contrib/receiver/githubreceiver < 0.151.0 -

II. Public POCs for CVE-2026-55701

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III. Intelligence Information for CVE-2026-55701

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Patches & Fixes for CVE-2026-55701 (2)

Vendor Advisories for CVE-2026-55701 (1)

Vendor Pages for CVE-2026-55701 (1)

IV. Related Vulnerabilities

Same product: opentelemetry-collector-contrib
Same vendor: open-telemetry
Same weakness: CWE-863

V. Comments for CVE-2026-55701

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