What is GHSA-257m-4vpx-xg86?

GHSA-257m-4vpx-xg86 is a security advisory published by GitHub Security Advisories with Critical severity. Logto performs principal lookup without normalizing email and identifier strings, enabling...

Which CVE IDs does GHSA-257m-4vpx-xg86 cover?

GHSA-257m-4vpx-xg86 covers the following CVE IDs: CVE-2026-15617. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-257m-4vpx-xg86?

GHSA-257m-4vpx-xg86 has a CVSS v3 base score of 9.1, published by GitHub Security Advisories.

GHSA-257m-4vpx-xg86CriticalCVSS 9.1

Logto performs principal lookup without normalizing email and identifier strings, enabling...

Vendor

GitHub Security Advisories

Published

July 23, 2026

Last Modified

July 27, 2026

🔗 CVE IDs covered (1)

CVE-2026-15617 →

📋 Description

Logto performs principal lookup without normalizing email and identifier strings, enabling principal collision and unauthorized account access via case- or Unicode-different identities.

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-15617
https://github.com/logto-io/logto/blob/ea3ede35028dfd0bbb6d7b239623ce0e7f6cdff8/packages/core/src/libraries/verification-helpers/single-sign-on-guard.ts#L23-L33
https://github.com/advisories/GHSA-257m-4vpx-xg86