High severity · published Jul 15, 2026
CVE-2026-47164
Vaultwarden: SSO Email Auto-Link Can Bind an Existing Local Account to an Attacker-Controlled IdP Identity
7.7
CVSS
0.4%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 39% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VA
vaultwarden · dani-garcia
< 1.36.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-47164
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-47164
github.com
https://github.com/dani-garcia/vaultwarden/commit/d297e274a35dccd0f5d935e9d5934e0f7e9c0a87
github.com
https://github.com/dani-garcia/vaultwarden/pull/7163
github.com
https://github.com/dani-garcia/vaultwarden/releases/tag/1.36.0
github.com
https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-6x5c-84vm-5j56
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