EUVD-2026-40438
GHSA-443m-f58x-jx9j
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Publishable key is publicly distributed so effectively PR:N; only org existence leaks so C:L; no integrity or availability impact applies.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
2DescriptionCVE.org
Capgo before 12.128.2 contains an information disclosure vulnerability in the public.invite_user_to_org RPC function that allows unauthenticated attackers to enumerate organization existence by observing distinct error responses. Attackers can call the SECURITY DEFINER function with a publishable API key to determine if an organization ID exists based on NO_ORG versus NO_RIGHTS responses, enabling tenant enumeration attacks.
AnalysisAI
Unauthenticated organization enumeration in Capgo before 12.128.2 exposes tenant existence through differential error responses in the public.invite_user_to_org SECURITY DEFINER RPC function. Any caller holding a publishable API key - a client-side credential intentionally distributed in mobile apps - can probe arbitrary organization IDs and distinguish NO_ORG from NO_RIGHTS responses, confirming or denying tenant existence at scale. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must possess a publishable API key from any application built on the target Capgo instance; such keys are intentionally distributed in mobile app binaries and are not secret. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N scores 6.9 and accurately characterizes this as network-accessible, zero-complexity, effectively unauthenticated exploitation with low confidentiality impact - no inflation or deflation detected. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker extracts a publishable API key from any publicly distributed mobile application built on Capgo - no reverse engineering is required as such keys are designed to be client-visible. The attacker then runs an automated script iterating over candidate organization IDs, calling public.invite_user_to_org for each and classifying responses as NO_ORG (does not exist) or NO_RIGHTS (exists), building a confirmed list of active tenant IDs for use in targeted downstream attacks such as phishing or credential stuffing. … |
| Remediation | Upgrade Capgo to version 12.128.2 or later as the primary remediation; this is the vendor-confirmed fix per the GitHub Security Advisory GHSA-35q8-ghfg-vp6m at https://github.com/Cap-go/capgo/security/advisories/GHSA-35q8-ghfg-vp6m. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-203 – Observable Discrepancy
View allSame technique Information Disclosure
View allShare
External POC / Exploit Code
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