CVE-2026-47158Network attack vector

Account takeover via OAuth state fixation

Published Jul 15, 2026 · Updated Jul 15, 2026

CSRF in Vaultwarden before 1.36.0 allows remote attackers to take over SSO accounts by fixating an OAuth authorization flow. The /connect/authorize endpoint accepts attacker-chosen state and PKCE values without browser-session binding, while failed exchanges leave the keyed SsoAuth record reusable. SSO must be enabled and a victim must follow the IdP link or have an active IdP session; account 2FA blocks final session issuance.

CVSS severity8.3
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CSRF in Vaultwarden before 1.36.0 allows remote attackers to take over SSO accounts by fixating an OAuth authorization flow. The /connect/authorize endpoint accepts attacker-chosen state and PKCE values without browser-session binding, while failed exchanges leave the keyed SsoAuth record reusable. SSO must be enabled and a victim must follow the IdP link or have an active IdP session; account 2FA blocks final session issuance.

The record

CVE
CVE-2026-47158
Published
Jul 15, 2026
Updated
Jul 15, 2026
Vendor
Dani Garcia
Product
Vaultwarden
Classifications
CWE-352, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 15, 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=< 1.36.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Dani Garcia · Vaultwardenversion=< 1.36.0

Published CVSS scores

8.3GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:H

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
T1190Exploit Public-Facing Application

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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