CVE-2026-62669Public exploitNetwork attack vector

Account takeover via 2FA secret regeneration

Published Aug 19, 2026 · Updated Aug 19, 2026

Authentication bypass in Grav Login Plugin before 3.8.11 allows attackers to log in as users by regenerating a pending 2FA secret. During the TOTP challenge, taskRegenerate2FASecret() checks only that the session user exists instead of requiring $user->authorized, then overwrites twofa_secret, saves it, and returns the new secret in a JSON response. Exploitation requires the victim's correct password and enabled TOTP; attackers can compute a valid code from the returned secret, complete authentication, and lock the victim out by replacing the original secret.

CVSS severity7.4
High
EPSS probability0.39%
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 Grav Login Plugin before 3.8.11 allows attackers to log in as users by regenerating a pending 2FA secret. During the TOTP challenge, taskRegenerate2FASecret() checks only that the session user exists instead of requiring $user->authorized, then overwrites twofa_secret, saves it, and returns the new secret in a JSON response. Exploitation requires the victim's correct password and enabled TOTP; attackers can compute a valid code from the returned secret, complete authentication, and lock the victim out by replacing the original secret.

The record

CVE
CVE-2026-62669
Published
Aug 19, 2026
Updated
Aug 19, 2026
Vendor
Grav
Product
Grav Login Plugin
Classifications
CWE-287, T1078
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 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=< 3.8.11

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Grav · Grav Login Pluginversion=< 3.8.11
Grav · Gravversion=< 2.0.4

Published CVSS scores

7.4GitHub, Inc.CVSS:3.1/AV:N/AC:H/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 exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication
T1078Valid Accounts

Public exploit references

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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