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CVE-2026-92729 – Authentication Bypass (Trace Funnel Analytics Exposure) – SigNoz 0.88.0 through 0.1

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Summary

CVE-2026-92729 is a missing-authentication/missing-authorization vulnerability in SigNoz, the open-source observability platform, affecting versions 0.88.0 through 0.141.0. The flaw allows unauthenticated attackers over the network to reach trace-funnel analytics endpoints and retrieve sensitive tracing data without any credentials. The issue is rated HIGH severity.

Technical details

  • Root cause: the trace-funnel analytics routes in SigNoz’s HTTP handler were implemented without the authorization wrapper applied to other API routes, so requests to these endpoints bypass authentication checks entirely.
  • Trigger condition: an attacker sends requests directly to the trace-funnel analytics endpoints of an internet-exposed SigNoz instance; no valid session, API key, or user interaction is required.
  • Attack vector: Network (remote, unauthenticated), low attack complexity.
  • Impact: disclosure of trace identifiers, span durations, span counts, and error information tied to an organization’s distributed traces — data that can reveal internal service topology, transaction identifiers, and application behavior useful for further targeting.

Affected software

  • SigNoz (signoz), Go module github.com/SigNoz/signoz
  • Versions 0.88.0 through 0.141.0 (inclusive)
  • Fixed in version 0.141.1

Severity

  • CVSS v3.1 Base Score: 8.2 (High) — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L
  • CVSS v4.0 Base Score: 8.8 (High) — CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:L/SC:N/SI:N/SA:N
  • CWE-306: Missing Authentication for Critical Function; CWE-862: Missing Authorization

Mitigation and recommended actions

  • Immediate: upgrade SigNoz to version 0.141.1 or later, which restores the authorization wrapper on trace-funnel analytics routes.
  • If immediate patching is not possible: restrict network access to the SigNoz web/API interface to trusted internal networks or VPN, and place it behind an authenticating reverse proxy or gateway that enforces access control in front of the trace-funnel analytics endpoints until the upgrade is applied.
  • Review SigNoz access and audit logs for unexpected or unauthenticated requests to trace-funnel analytics endpoints during the exposure window.

References

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