CVE-2026-43911
Last modified
CVE-2026-43911 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. 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). EPSS estimates a 0.22% chance of exploitation in the next 30 days.
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/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Weakness Enumeration
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
- Last Modified
- Status
- Analyzed
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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