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Description

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.

PUBLISHED Reserved 2026-06-19 | Published 2026-06-23 | Updated 2026-06-23 | Assigner VulnCheck




MEDIUM: 6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
MEDIUM: 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Problem types

Improper Restriction of Excessive Authentication Attempts

Product status

Default status
unaffected

Any version before 12.128.2
affected

12.128.2 (semver)
unaffected

Credits

Judel777 reporter

References

github.com/.../capgo/security/advisories/GHSA-f6v3-xv4g-79h5 exploit

github.com/.../capgo/security/advisories/GHSA-f6v3-xv4g-79h5 (GitHub Security Advisory (GHSA-f6v3-xv4g-79h5)) vendor-advisory

www.vulncheck.com/...cessible-credential-validation-endpoint (VulnCheck Advisory: Capgo - Password Spraying via Public-Key Accessible Credential Validation Endpoint) third-party-advisory

cve.org (CVE-2026-56234)

nvd.nist.gov (CVE-2026-56234)

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