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Vulnerability record · CVE-2026-47164 · published 15 July 2026

CVE-2026-47164: Improper access control vulnerability

Vaultwarden is a Bitwarden-compatible server written in Rust. Prior to 1.36.0, Vaultwarden's SSO login flow checked the IdP email_verified claim only for new-user creation and not when SSO_SIGNUPS_MATCH_EMAIL=true linked an IdP identity to an existing local account, allowing an attacker-controlled IdP identity asserting a victim email address to bind to and authenticate as that account. This issue is fixed in version 1.36.0.

7.7 CVSS 3.1 High EPSS 0.45% · top 63.6% CWE-284 · Improper access control Deferred
7.7CVSS 3.1 base score
0.45%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
15 Jul 2026Last modified by NVD

Description

Vaultwarden is a Bitwarden-compatible server written in Rust. Prior to 1.36.0, Vaultwarden's SSO login flow checked the IdP email_verified claim only for new-user creation and not when SSO_SIGNUPS_MATCH_EMAIL=true linked an IdP identity to an existing local account, allowing an attacker-controlled IdP identity asserting a victim email address to bind to and authenticate as that account. This issue is fixed in version 1.36.0.

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

References

LinkTags
https://github.com/dani-garcia/vaultwarden/commit/d297e274a35dccd0f5d935e9d5934e0f7e9c0a87
https://github.com/dani-garcia/vaultwarden/pull/7163
https://github.com/dani-garcia/vaultwarden/releases/tag/1.36.0
https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-6x5c-84vm-5j56

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Source: NIST National Vulnerability Database (record CVE-2026-47164), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.