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CVE-2026-67327 is an account takeover vulnerability in better-auth affecting versions 1.1.3 through before 1.6.22, and pre-release versions 1.7.0-beta.0 through before 1.7.0-beta.10. The flaw arises in deployments that allow open email/password registration together with passwordless authentication via magic-link or email-OTP. An attacker can pre-register an account using a victim's email address and an attacker-controlled password, leaving the account unverified. When the legitimate owner later authenticates through the magic-link or email-OTP flow, the account is marked verified, but the previously set password is not removed and existing sessions are not revoked. As a result, the attacker retains valid authentication material tied to the victim's now-verified account, enabling persistent unauthorized access.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.