CVE-2026-34456Network attack vector

Unauthenticated account takeover via email-only OAuth linking

Published Apr 1, 2026 · Updated Apr 1, 2026

Authentication bypass in Reviactyl Panel 26.2.0-beta.1 through 26.2.0-beta.4 allows remote attackers to take over accounts via OAuth. SocialLoginController::callback looks up an existing user by the provider-supplied email, creates a social login for that user, and starts an authenticated session without verifying account ownership. No prior panel access or victim interaction is required; control of a provider account bearing the victim's email grants full access to that victim's panel account.

CVSS severity9.1
Critical
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Reviactyl Panel 26.2.0-beta.1 through 26.2.0-beta.4 allows remote attackers to take over accounts via OAuth. SocialLoginController::callback looks up an existing user by the provider-supplied email, creates a social login for that user, and starts an authenticated session without verifying account ownership. No prior panel access or victim interaction is required; control of a provider account bearing the victim's email grants full access to that victim's panel account.

The record

CVE
CVE-2026-34456
Published
Apr 1, 2026
Updated
Apr 1, 2026
Vendor
Reviactyl
Product
Reviactyl Panel
Classifications
CWE-284, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 1, 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=>= 26.2.0-beta.1, < 26.2.0-beta.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Reviactyl · Reviactyl Panelversion=>= 26.2.0-beta.1, < 26.2.0-beta.5

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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