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Missing authentication exposes pprof debug endpoints in frp

Priority MEDIUM 61CWE-306Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Security bypass
Confidentiality · integrity · availability
Low · None · Low
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-306.

Summary

frp from 0.41.0 through 0.71.1 lets unauthenticated remote attackers reach pprof debug endpoints without credentials. The handlers are registered on the root mux outside Basic Authentication, which is a missing authentication flaw (CWE-306). An attacker can query /debug/pprof/ on the frps dashboard or frpc admin listeners to obtain cmdline, goroutine stacks and heap profiles, and can trigger CPU profiling.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

frp 0.41.0 through 0.71.1 contains a missing authentication vulnerability that allows unauthenticated remote attackers to access pprof debug endpoints because handlers are registered on the root mux outside Basic Authentication. Attackers can query /debug/pprof/ endpoints on frps dashboard or frpc admin listeners to obtain cmdline, goroutine stacks, heap profiles, and trigger CPU profiling.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00781 56th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

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
fatedierfrp0.41.0 – 0.71.1—No fix listedCNA
  • frp Vendorfatedier Affected 0.41.0 – 0.71.1 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for frp.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Timeline

  1. 2026-10-14 Threatist record created from CVE-2026-110619
  2. 2026-10-14 Alias added: GHSA-8584-2qgx-4xpf
  3. 2026-10-15 CISA SSVC decision points changed

References

  • TI-2026-51654 frp: Unauthenticated Remote Denial of Service in the frp SSH Tunnel Gateway via Integer Overflow CVSS 4.0HIGH 8.7
  • TI-2026-29566 frp: Authentication bypass in frp HTTP vhost routing when routeByHTTPUser is used for access control CVSS 3.1CRITICAL 9.1

Sources