# Better Auth: Account takeover via pre-account hijacking on magic-link and email-OTP sign-in

Advisory record · `GHSA-qq9h-g4jm-xgf3`

- **Identifiers:** `GHSA-qq9h-g4jm-xgf3` · `CVE-2026-67327`
- **State:** Confirmed
- **Severity:** CVSS 8.7 High
- **Critical:** No
- **Weakness (CWE):** [CWE-287](https://cwe.mitre.org/data/definitions/287.html) · [CWE-345](https://cwe.mitre.org/data/definitions/345.html)
- **Tags:** [Authentication bypass](https://agentprime.io/advisories/tag/auth-bypass.md) · [CWE-345](https://agentprime.io/advisories/tag/cwe-345.md)
- **Published:** 24 Jul 2026
- **Updated:** 2 Aug 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 24 Jul 2026, 15:44 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `better-auth` (npm): affected `>=1.1.3, <1.6.22 || >=1.7.0-beta.0, <1.7.0-beta.10`; fixed in `1.6.22`, `1.7.0-beta.10`

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 8.7 High, CVSS 4.0: `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N`, from CNA (VulnCheck)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0043, the 37th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the GitHub Advisory Database, published 24 Jul 2026. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-qq9h-g4jm-xgf3](https://github.com/advisories/GHSA-qq9h-g4jm-xgf3)
- [OSV: GHSA-qq9h-g4jm-xgf3](https://osv.dev/vulnerability/GHSA-qq9h-g4jm-xgf3)
- <https://github.com/better-auth/better-auth/security/advisories/GHSA-qq9h-g4jm-xgf3>
- <https://github.com/better-auth/better-auth/pull/10239>
- <https://github.com/better-auth/better-auth/commit/c06a56d83a40bbaeac12d3a8b8b67e59f92a9110>
- <https://github.com/better-auth/better-auth>
- <https://github.com/better-auth/better-auth/releases/tag/v1.6.22>
- <https://github.com/better-auth/better-auth/releases/tag/v1.7.0-beta.10>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-qq9h-g4jm-xgf3>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-qq9h-g4jm-xgf3/>. Everything for agents: <https://agentprime.io/llms.txt>.