dani-garcia vaultwarden up to 1.35.4 Password Change security_stamp session expiration

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in dani-garcia vaultwarden up to 1.35.4. This vulnerability affects the function security_stamp of the component Password Change Handler. Executing a manipulation can lead to session expiration. The identification of this vulnerability is CVE-2026-43911. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in dani-garcia vaultwarden up to 1.35.4 and classified as problematic. This vulnerability affects the function security_stamp of the component Password Change Handler. The manipulation with an unknown input leads to a session expiration vulnerability. The CWE definition for the vulnerability is CWE-613. According to WASC, "Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization." As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability was named CVE-2026-43911 since 05/04/2026. The exploitation appears to be difficult. The attack can be initiated remotely. Technical details are known, but there is no available exploit.

Upgrading to version 1.35.5 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-1285). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Open Source Vaultwarden

Productinfo

Vendor

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.6

VulDB Base Score: 5.0
VulDB Temp Score: 4.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 8.1
NVD Vector: 🔒

CNA Base Score: 6.8
CNA Vector (GitHub_M): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Session expiration
CWE: CWE-613
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: vaultwarden 1.35.5

Timelineinfo

05/04/2026 CVE reserved
05/12/2026 +8 days Advisory disclosed
05/12/2026 +0 days VulDB entry created
05/19/2026 +6 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-6j4w-g4jh-xjfx
Status: Confirmed

CVE: CVE-2026-43911 (🔒)
GCVE (CVE): GCVE-0-2026-43911
GCVE (VulDB): GCVE-100-362794
CERT Bund: WID-SEC-2026-1285 - Vaultwarden: Mehrere Schwachstellen

Entryinfo

Created: 05/12/2026 04:00
Updated: 05/19/2026 01:06
Changes: 05/12/2026 04:00 (65), 05/13/2026 06:28 (7), 05/19/2026 01:06 (11)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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