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TI-2026-40215 Aliases CVE-2026-55701GHSA-w5cv-pw74-4rxc

OpenTelemetry githubreceiver silently ignores configured required_headers authentication

Priority MEDIUM 40CWE-863Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-863.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00701 53rd percentileScored 2026-11-07
Fix Fixed opentelemetry-collector-contrib (open-telemetry): 0.151.0github.com/open-telemetry/opentelemetry-collector-contrib/receiver/githubreceiver (open-telemetry): 0.151.0+1 more productRed Hat: 1 advisory

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
open-telemetryopentelemetry-collector-contribbefore 0.151.00.151.0Patch availableCNA
open-telemetrygithub.com/open-telemetry/opentelemetry-collector-contrib/receiver/githubreceiverbefore 0.151.00.151.0Patch availableCNA
—github.com/open-telemetry/opentelemetry-collector-contrib/receiver/githubreceiver (Go)before 0.151.00.151.0Patch availableGHSA-w5cv-pw74-4rxc
  • opentelemetry-collector-contrib Vendoropen-telemetry Affected before 0.151.0 Fixed in 0.151.0 Patch available CNA
  • github.com/open-telemetry/opentelemetry-collector-contrib/receiver/githubreceiver Vendoropen-telemetry Affected before 0.151.0 Fixed in 0.151.0 Patch available CNA
  • github.com/open-telemetry/opentelemetry-collector-contrib/receiver/githubreceiver (Go) Vendor— Affected before 0.151.0 Fixed in 0.151.0 Patch available GHSA-w5cv-pw74-4rxc

Remediation

  • Fix · CNA opentelemetry-collector-contrib (open-telemetry) Fixed in 0.151.0
  • Fix · CNA github.com/open-telemetry/opentelemetry-collector-contrib/receiver/githubreceiver (open-telemetry) Fixed in 0.151.0
  • Fix · GHSA-w5cv-pw74-4rxc github.com/open-telemetry/opentelemetry-collector-contrib/receiver/githubreceiver (Go) Fixed in 0.151.0 Advisory →

Red Hat 1 advisory

  • RHSA-2026:63152 Released 2026-09-03 · Red Hat rating Moderate
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images opentelemetry-collector-contrib-0.160.0-0.1.hum1@aarch64, opentelemetry-collector-contrib-0.160.0-0.1.hum1@src, opentelemetry-collector-contrib-0.160.0-0.1.hum1@x86_64

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Hardened ImagesFixed RHSA-2026:63152

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-55701
  2. 2026-10-03 Alias added: GHSA-w5cv-pw74-4rxc

References

Other 5

  • TI-2024-23957 OpenTelemetry Collector has a Denial of Service via Zip/Decompression Bomb sent over HTTP or gRPC CVSS 3.1HIGH 8.2
  • TI-2026-42706 OpenTelemetry JavaScript: Denial of service in `JaegerPropagator` via unhandled exception on a malformed header CVSS 3.1HIGH 7.5
  • TI-2026-33428 OpenTelemetry eBPF Instrumentation: Memcached payload length overflow can crash OBI CVSS 3.1HIGH 7.5
  • TI-2026-33427 OpenTelemetry eBPF Instrumentation: MongoDB parser panics on malformed wire messages CVSS 3.1HIGH 7.5
  • TI-2026-33420 OpenTelemetry eBPF Instrumentation: Postgres BIND parsing can panic on malformed payloads CVSS 3.1HIGH 7.5
  • TI-2026-32777 opentelemetry-js: Prometheus exporter process crash via malformed HTTP request CVSS 3.1HIGH 7.5
See all 62 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences