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CVE-2026-43911

Vaultwarden: Refresh tokens not invalidated on security stamp rotation

Published: May 11, 2026Updated: May 18, 2026 Sources: CVE List NVDCWE-613
NVD MITRE
6.8CVSSMEDIUM
EPSS Score
0.2%
Top 88.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Workaround Only

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.

CVSS Vector Breakdown

AV:NAC:HPR:LUI:NS:UC:HI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-613

Affected Products

vaultwardendani-garcia
On-prem
Security Products / identity-access-mgmt
dani-garciaoss-projectSecurity Productsaka vaultwarden

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Workaround Available

MITRE ATT&CK

2 techniques
Defense Evasion
Initial Access
View detailed technique mapping

References

https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-6j4w-g4jh-xjfx
github.com

Timeline

Published
May 11, 2026
Last Updated
May 18, 2026

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