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TI-2026-34839 Aliases CVE-2026-47256GHSA-4jvg-4jfx-fmhc

Path traversal in open-telemetry opentelemetry-collector-contrib

Priority MEDIUM 57CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-22 and the CVSS impact.

Summary

OpenTelemetry, also known as OTel, is a vendor-neutral open source Observability framework for instrumenting, generating, collecting, and exporting telemetry data such as traces, metrics, and logs. Prior to 0.154.0, the Sentry exporter reads the remote OTLP sender-controlled service.name resource attribute in exporter/sentryexporter/sentry_exporter.go through extractProjectSlug and getOrCreateProjectEndpoint, passes the raw project slug to GetOTLPEndpoints and GetProjectKeys in exporter/sentryexporter/sentry_client.go, and interpolates it into a Sentry API URL without applying projectSlugRegexp through validateRoutingConfig at runtime in exporter/sentryexporter/config.go. Special characters can turn the expected path suffix into query data in all deployments or introduce slash and dot segments that traverse paths when the Sentry deployment normalizes them, while the Collector attaches its operator-configured bearer token to the request. A successful request can reach token-authorized administrative, organization, member, or key endpoints within the configured Sentry organization, and an attacker-controlled project slug can redirect subsequently exported telemetry. Sentry token middleware prevents cross-organization access. This issue is fixed in version 0.154.0.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00437 38th percentileScored 2026-11-07
Fix Fixed opentelemetry-collector-contrib (open-telemetry): 0.154.0github.com/open-telemetry/opentelemetry-collector-contrib/exporter/sentryexporter (open-telemetry): 0.154.0+1 more productRed Hat: 1 advisory

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

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 0.154.00.154.0Patch availableCNA
open-telemetrygithub.com/open-telemetry/opentelemetry-collector-contrib/exporter/sentryexporterbefore 0.154.00.154.0Patch availableCNA
—github.com/open-telemetry/opentelemetry-collector-contrib/exporter/sentryexporter (Go)before 0.154.00.154.0Patch availableGHSA-4jvg-4jfx-fmhc
  • opentelemetry-collector-contrib Vendoropen-telemetry Affected before 0.154.0 Fixed in 0.154.0 Patch available CNA
  • github.com/open-telemetry/opentelemetry-collector-contrib/exporter/sentryexporter Vendoropen-telemetry Affected before 0.154.0 Fixed in 0.154.0 Patch available CNA
  • github.com/open-telemetry/opentelemetry-collector-contrib/exporter/sentryexporter (Go) Vendor— Affected before 0.154.0 Fixed in 0.154.0 Patch available GHSA-4jvg-4jfx-fmhc

Remediation

  • Fix · CNA opentelemetry-collector-contrib (open-telemetry) Fixed in 0.154.0
  • Fix · CNA github.com/open-telemetry/opentelemetry-collector-contrib/exporter/sentryexporter (open-telemetry) Fixed in 0.154.0
  • Fix · GHSA-4jvg-4jfx-fmhc github.com/open-telemetry/opentelemetry-collector-contrib/exporter/sentryexporter (Go) Fixed in 0.154.0 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-2026-47256
  2. 2026-10-03 Alias added: GHSA-4jvg-4jfx-fmhc

References

Other 4

  • 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