EUVD-2026-27448Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
4DescriptionGitHub Advisory
Vaultwarden is a Bitwarden-compatible server written in Rust. In version 1.35.4 and earlier, the get_org_collections_details endpoint (GET /api/organizations/{org_id}/collections/details) is missing the has_full_access() authorization check that exists on the sibling get_org_collections endpoint. This allows any Manager-role user with accessAll=False and no collection assignments to retrieve the names, UUIDs, user-to-collection mappings, and group-to-collection mappings for all collections in the organization. This issue has been fixed in version 1.35.5.
AnalysisAI
Vaultwarden versions 1.35.4 and earlier expose organization collection metadata to Manager-role users lacking full access permissions due to a missing authorization check on the get_org_collections_details endpoint. An authenticated Manager with accessAll=False and no collection assignments can retrieve collection names, UUIDs, and user-to-collection and group-to-collection mappings for all organization collections, representing a confidentiality breach of sensitive organizational structure data. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The vulnerability requires all of the following conditions to be met: (1) Attacker must possess valid authentication credentials for the Vaultwarden instance; (2) Attacker's user account must hold the Manager role (not Admin or normal User); (3) The Manager account must have accessAll flag set to False; (4) The Manager account must have zero collection assignments (no explicit collection access grants); (5) The organization must contain at least one collection whose metadata is being disclosed. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 5.3 score (AV:N/AC:L/PR:L/UI:N) reflects a network-accessible endpoint requiring low-complexity exploitation by an authenticated user with no user interaction. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with legitimate Manager role credentials but configured with accessAll=False and no explicit collection assignments authenticates to a Vaultwarden instance. The attacker sends an HTTP GET request to /api/organizations/{org_id}/collections/details, which processes the request without the has_full_access() authorization check due to the missing security control. … |
| Remediation | Upgrade Vaultwarden to version 1.35.5 or later immediately. … Detailed patch versions, workarounds, and compensating controls in full report. |
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