---
title: "CVE-2026-88864: Capgo - Broken Access Control"
description: "Capgo contains a broken access control vulnerability caused by unrestricted write access to the public.sso_providers table via Supabase PostgREST, letting attackers with a full API key bypass SSO provisioning controls and enforce arbitrary SSO, exploit requires possession of a full API key."
url: https://panop.io/threat-heartbeat/CVE-2026-88864/
---

# CVE-2026-88864 Capgo - Broken Access Control

Capgo contains a broken access control vulnerability caused by unrestricted write access to the public.sso\_providers table via Supabase PostgREST, letting attackers with a full API key bypass SSO provisioning controls and enforce arbitrary SSO, exploit requires possession of a full API key.

CVSS base score 9.1 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.37% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-88864)

## Details

Type

Broken Access Control

Impact

Broken Access Control

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:L

Published

10 September 2026

Updated

15 October 2026

Weakness

[CWE-284](https://cwe.mitre.org/data/definitions/284.html)

## Vendor fix

Restrict direct write access to the public.sso\_providers table and implement proper SSO provisioning controls; update to the latest fixed version when available.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-88864](https://nvd.nist.gov/vuln/detail/CVE-2026-88864)
- [https://github.com/Cap-go/capgo.app/security/advisories/GHSA-xg7v-83qv-qfff](https://github.com/Cap-go/capgo.app/security/advisories/GHSA-xg7v-83qv-qfff)
- [https://www.vulncheck.com/advisories/capgo-sso-provider-authentication-bypass-via-postgrest-direct-write](https://www.vulncheck.com/advisories/capgo-sso-provider-authentication-bypass-via-postgrest-direct-write)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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