CVE-2026-43911

HighCVSS 8.1/10Last modified Oct 26, 2026

Description

Vaultwarden is a Bitwarden-compatible server written in Rust. Prior to 1.35.5, refresh tokens are not invalidated when the user's security_stamp is rotated by some security-sensitive operations (password change, KDF change, key rotation, email change, org admin password reset, emergency access takeover). This allows an attacker holding a previously obtained refresh token to maintain session access even after the user has taken action to secure their account. This vulnerability is fixed in 1.35.5.

Metrics

CVSS 3.1 8.1/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Weakness enumeration

CWE-613

Affected software

Vendor	Product	Versions
dani-garcia	vaultwarden	< 1.35.5

References

https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-6j4w-g4jh-xjfxExploit, Mitigation, Vendor Advisory
https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-6j4w-g4jh-xjfxExploit, Mitigation, Vendor Advisory

Timeline

Published: May 11, 2026
Last modified: Oct 26, 2026
NVD status: Analyzed

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