CVE-2026-71959Network attack vectorHinoki check available

Authenticated audit-log forgery via missing membership check

Published Aug 10, 2026 · Updated Aug 10, 2026

Missing authorization in Bitwarden Server before 2026.7.2 allows remote authenticated users to forge backdated organization audit events. CollectController.Post logged four body-supplied organization event types and timestamps without checking whether the caller belonged to the target organization. Any valid account could corrupt another organization's audit history without reading or deleting vault data.

CVSS severity6.9
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Missing authorization in Bitwarden Server before 2026.7.2 allows remote authenticated users to forge backdated organization audit events. CollectController.Post logged four body-supplied organization event types and timestamps without checking whether the caller belonged to the target organization. Any valid account could corrupt another organization's audit history without reading or deleting vault data.

The record

CVE
CVE-2026-71959
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
Bitwarden
Product
Bitwarden Server
Classifications
CWE-862, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 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=0 <2026.7.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Bitwarden · Bitwarden Serverversion=0 <2026.7.2

Published CVSS scores

5.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
6.9VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
T1565.001Stored Data Manipulation

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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