CVE-2026-33420Network attack vector

Restricted Manager metadata disclosure via missing authorization

Published May 5, 2026 · Updated May 5, 2026

Missing authorization in Vaultwarden 1.35.4 and earlier allows remote authenticated users to read organization collection metadata. The get_org_collections_details endpoint requires only ManagerHeadersLoose, omits has_full_access(), and returns Collection::find_by_organization() results without filtering on the computed assigned flag. A Manager role with accessAll=False and no collection assignments is sufficient; the exposed data comprises names, UUIDs, and user and group mappings.

CVSS severity5.3
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Vaultwarden 1.35.4 and earlier allows remote authenticated users to read organization collection metadata. The get_org_collections_details endpoint requires only ManagerHeadersLoose, omits has_full_access(), and returns Collection::find_by_organization() results without filtering on the computed assigned flag. A Manager role with accessAll=False and no collection assignments is sufficient; the exposed data comprises names, UUIDs, and user and group mappings.

The record

CVE
CVE-2026-33420
Published
May 5, 2026
Updated
May 5, 2026
Vendor
Dani Garcia
Product
Vaultwarden
Classifications
CWE-862, T1069
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 5, 2026CVE publishedPublication date reported by the CVE source.
  2. May 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.35.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Dani Garcia · Vaultwardenversion=< 1.35.5

Published CVSS scores

5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.3GitHub, Inc.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

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1069Permission Groups Discovery

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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