EUVD-2026-38429
GHSA-74wf-7q7r-hjxr
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
PR:N because the public anon key is non-secret; C:L for credential oracle exposure; I:L because successful spraying enables account takeover with downstream integrity impact.
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 a credential validation vulnerability in the POST /functions/v1/private/validate_password_compliance endpoint that is callable using only the public Supabase key without authentication. The endpoint is CORS-permissive with wildcard origin allowance and lacks rate limiting, enabling attackers to perform password spraying and credential stuffing attacks to compromise user accounts.
AnalysisAI
Unauthenticated access to Capgo's credential validation endpoint before version 12.128.2 enables large-scale password spraying and credential stuffing attacks against user accounts. The POST /functions/v1/private/validate_password_compliance Supabase Edge Function accepts requests using only the publicly distributed anon key - a client-side secret embedded in shipped app binaries - with no rate limiting or lockout enforcement. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must possess the public Supabase anon key for the target Capgo instance. … 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) confirms this is remotely exploitable, requires no authentication, and has no attack complexity or special conditions - consistent with the description, since the public Supabase anon key is embedded in every shipped app. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker decompiles or proxies a Capgo-connected mobile app to extract the public Supabase anon key from its configuration. They then run an automated credential stuffing tool - such as a simple Python script using a list of breached email/password combos - sending POST requests to `/functions/v1/private/validate_password_compliance` at an unrestricted rate. … |
| Remediation | Upgrade Capgo to version 12.128.2 or later as documented in the vendor advisory at https://github.com/Cap-go/capgo/security/advisories/GHSA-f6v3-xv4g-79h5. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Account pre-registration hijack in Capgo before 12.128.2 lets a remote unauthenticated attacker claim an account under a
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Same technique Information Disclosure
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External POC / Exploit Code
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