CVE-2026-43912

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Source
https://cve.org/CVERecord?id=CVE-2026-43912
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43912.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-43912
Aliases
  • GHSA-569v-845w-g82p
Published
2026-05-11T21:56:30.108Z
Modified
2026-07-08T08:13:29.741951343Z
Severity
  • 8.7 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N CVSS Calculator
Summary
Vaultwarden: Cross-Org Group Binding Enables Unauthorized Read And Write Access Into Another Organization
Details

Vaultwarden is a Bitwarden-compatible server written in Rust. Prior to 1.35.5, Vaultwarden does not enforce that a groupsusers.usersorganizationsuuid entry belongs to the same organization as groups.groupsuuid, or a collectionsgroups.collectionsuuid entry belongs to the same organization as collectionsgroups.groupsuuid. Multiple organization group-management endpoints accept arbitrary MembershipId and CollectionId values and persist them directly without verifying org consistency. This lets an attacker who is Admin in Organization A, and only a low-privileged member in Organization B bind their Org B membership UUID into an Org A group, then use that foreign group relationship to gain unauthorized access to Org B vault data. With an accessAll=true Org A group, the attacker can make /api/sync and /api/ciphers enumerate Org B ciphers. Once those unauthorized sync results reveal Org B collection IDs, the attacker can also bind those foreign collection IDs to the Org A group and turn the same flaw into write access over Org B items. This vulnerability is fixed in 1.35.5.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43912.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-285"
    ]
}
References

Affected packages

Git / github.com/dani-garcia/vaultwarden

Affected ranges

Type
GIT
Repo
https://github.com/dani-garcia/vaultwarden
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
39954af96aff8eb70eb4d26969abc1458bc4804f
Database specific 
{
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE"
    ],
    "cpe": "cpe:2.3:a:dani-garcia:vaultwarden:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.35.5"
        }
    ]
}

Affected versions

0.*
0.10.0
0.11.0
0.12.0
0.13.0
1.*
1.0.0
1.1.0
1.10.0
1.11.0
1.12.0
1.13.0
1.13.1
1.14
1.14.1
1.14.2
1.15.0
1.15.1
1.16.0
1.16.1
1.16.2
1.16.3
1.17.0
1.18.0
1.19.0
1.2.0
1.20.0
1.21.0
1.22.0
1.22.1
1.22.2
1.23.0
1.23.1
1.24.0
1.25.0
1.25.1
1.25.2
1.26.0
1.27.0
1.28.0
1.28.1
1.29.0
1.29.1
1.29.2
1.3.0
1.30.0
1.30.1
1.30.2
1.30.3
1.30.4
1.30.5
1.31.0
1.32.0
1.32.1
1.32.2
1.32.3
1.32.4
1.32.5
1.32.6
1.32.7
1.33.0
1.33.1
1.33.2
1.34.0
1.34.1
1.34.2
1.34.3
1.35.0
1.35.1
1.35.2
1.35.3
1.35.4
1.4.0
1.5.0
1.6.0
1.6.1
1.7.0
1.8.0
1.9.0
1.9.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43912.json"