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TI-2026-71347 Aliases CVE-2026-102596

Missing RBAC check on Nango flow-read routes exposes production flows

Priority MEDIUM 53CWE-862Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-862.

Summary

Nango before 0.70.9 has two private flow-read routes that skip the RBAC authorization check on accounts with RBAC enabled. This missing authorization (CWE-862) lets a same-team user with the development_full_access role read production integration flow metadata and named flow configurations. An authenticated user with low privileges can reach data that guarded production routes deny, but tenant boundaries are not crossed.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

Nango is an open-source platform for connecting agents and products to third-party APIs. Prior to 0.70.9, on accounts with RBAC enabled through a plan with has_rbac=true, two private flow-read routes, GET /api/v1/integrations/:providerConfigKey/flows and GET /api/v1/flow/:flowName, apply webAuth but omit can({ action: 'read', resource: 'flow', scopedBy: envScope }). A same-team user with the development_full_access role can therefore request env=prod and read production integration flow metadata or named flow configuration despite being denied by guarded production routes. Both controllers use res.locals.environment from the authenticated account, so the issue bypasses the production role boundary but does not cross tenant boundaries. This issue is fixed in version 0.70.9 and managed-1.5.11-0.70.8-aae30d044d7e229807d51a3957c212f3fb689e1a

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00293 22nd percentileScored 2026-11-07
Fix Fixed nango (NangoHQ): 0.70.9

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
NangoHQnangobefore 0.70.90.70.9Patch availableCNA
  • nango VendorNangoHQ Affected before 0.70.9 Fixed in 0.70.9 Patch available CNA

Remediation

Upgrade Nango to version 0.70.9, which fixes this issue.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA nango (NangoHQ) Fixed in 0.70.9

Timeline

  1. 2026-10-12 Threatist record created from CVE-2026-102596
  2. 2026-10-14 CISA SSVC decision points changed
  3. 2026-10-14 Priority changed: LOW → MEDIUM

References

Other 5

  • TI-2026-62543 Nango through 0.70.4 Server-Side Request Forgery via Configuration CVSS 4.0HIGH 7.1
  • TI-2026-08178 Nango < 0.71.6 Missing Authentication RCE via runner tRPC server CVSS 4.0CRITICAL 9.2

Sources

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