How severe is CVE-2024-56734?

CVE-2024-56734 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2024-56734 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-56734?

CVE-2024-56734 affects Better-auth Better Auth. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-56734?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2024-56734 have an EU (EUVD) identifier?

Yes. CVE-2024-56734 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-3569.

When was CVE-2024-56734 published?

CVE-2024-56734 was published on 2024-12-30 and last updated on 2026-06-17.

CVE-2024-56734

CVE-2024-56734 is a medium-severity vulnerability in Better-auth Better Auth with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-601.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v4: 7.9
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-3569
Weakness: CWE-601
Affected product: Better-auth Better Auth
Published: 2024-12-30
Last modified: 2026-06-17

Description

Better Auth is an authentication library for TypeScript. An open redirect vulnerability has been identified in the verify email endpoint of all versions of Better Auth prior to v1.1.6, potentially allowing attackers to redirect users to malicious websites. This issue affects users relying on email verification links generated by the library. The verify email callback endpoint accepts a `callbackURL` parameter. Unlike other verification methods, email verification only uses JWT to verify and redirect without proper validation of the target domain. The origin checker is bypassed in this scenario because it only checks for `POST` requests. An attacker can manipulate this parameter to redirect users to arbitrary URLs controlled by the attacker. Version 1.1.6 contains a patch for the issue.

Frequently asked questions

What is CVE-2024-56734?: Better Auth is an authentication library for TypeScript. An open redirect vulnerability has been identified in the verify email endpoint of all versions of Better Auth prior to v1.1.6, potentially allowing attackers to redirect users to malicious websites. This issue affects users relying on email verification links generated by the library. The verify email callback endpoint accepts a `callbackURL` parameter. Unlike other verification methods, email verification only uses JWT to verify and redirect without proper validation of the target domain. The origin checker is bypassed in this scenario because it only checks for `POST` requests. An attacker can manipulate this parameter to redirect users to arbitrary URLs controlled by the attacker. Version 1.1.6 contains a patch for the issue.
How severe is CVE-2024-56734?: CVE-2024-56734 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2024-56734 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-56734?: CVE-2024-56734 affects Better-auth Better Auth. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-56734?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-56734 have an EU (EUVD) identifier?: Yes. CVE-2024-56734 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-3569.
When was CVE-2024-56734 published?: CVE-2024-56734 was published on 2024-12-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:better-auth:better_auth:*:*:*:*:*:node.js:*:*

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