---
title: "CVE-2026-73302: Budibase: OIDC SSO account takeover: incoming identity linked by email without checking email_verified"
url: https://erroneo.us/security/cve/CVE-2026-73302/
description: "CVE-2026-73302 (@budibase/server (npm)): Budibase is an open-source low-code platform. Prior to 3.39.30, the OIDC flow in…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-08-13
date_modified: 2026-08-14
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-73302"
kev: false
cvss: 9
epss: 0.00427
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-73302: Budibase: OIDC SSO account takeover: incoming identity linked by email without checking email_verified

**Signal:** Critical, preconditions apply. Severe if exploited, but exploitation needs conditions that may not apply to you. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 0.4% , percentile 36: FIRST’s model estimates a 0.4% chance of exploitation activity in the next 30 days, higher than 36% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Needs an account (low (any account)). Exposure depends on who can log in.
- Only applies if your dependency tree includes @budibase/server (npm) <= 3.38.1, no fixed version listed . Check your lockfile, including transitive dependencies.

## What it is

Budibase is an open-source low-code platform. Prior to 3.39.30, the OIDC flow in packages/backend-core/src/middleware/passport/sso/oidc.ts resolved an email without getEmailVerified or an emailverified requirement, and packages/backend-core/src/middleware/passport/sso/sso.ts then used users.getGlobalUserByEmail as a fallback account-linking key. An attacker who can authenticate through a configured identity provider that asserts a victim email as unverified can have a fresh provider identity merged into the victim Budibase account and inherit the victim roles. This issue is fixed in version 3.39.30.

## Affected packages

- npm `@budibase/server` <= 3.38.1 → fixed: none listed

## Affected products (CVE record)

- Budibase budibase: < 3.39.30

## Severity

- GitHub_M CVSS 4.0: 9 `CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`
- GitHub CVSS 4.0: 9.0 `CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.43% probability of exploitation activity in the next 30 days; percentile 36.

## Sources

- [GitHub Advisory GHSA-hp6v-6jw7-gv2f](https://github.com/advisories/GHSA-hp6v-6jw7-gv2f)
- [CVE.org record CVE-2026-73302](https://www.cve.org/CVERecord?id=CVE-2026-73302)
- [NVD entry CVE-2026-73302](https://nvd.nist.gov/vuln/detail/CVE-2026-73302)
- [github.com](https://github.com/Budibase/budibase/security/advisories/GHSA-hp6v-6jw7-gv2f)
- [github.com](https://github.com/Budibase/budibase/pull/19173)
- [github.com](https://github.com/Budibase/budibase/commit/9ecd0048d9c3ae0ee9bd0e6204c621794dd1a4d3)
- [github.com](https://github.com/Budibase/budibase/releases/tag/3.39.30)

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Source page: https://erroneo.us/security/cve/CVE-2026-73302/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt