Unrated severityNVD Advisory· Published Jul 23, 2026· Updated Jul 27, 2026

Principal/domain lookup without case normalization

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.

Affected products

Logto Io/logtollm-fuzzy

Patches

Vulnerability mechanics

References

github.com/logto-io/logto/blob/ea3ede35028dfd0bbb6d7b239623ce0e7f6cdff8/packages/core/src/libraries/verification-helpers/single-sign-on-guard.tsmitre

News mentions

⚡ Weekly Recap: Rogue AI Agents, Check Point Exploit, Slopsquatting, ClickFix Lures and More
The Hacker News · Jul 27, 2026

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