CVE-2026-62317Logto: ReDoS via unescaped user input in email subaddressing regex (blockSubaddressing)
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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Logto is the modern, open-source auth infrastructure for SaaS and AI apps. Prior to 1.41.0, Logto's email subaddressing blocklist in packages/core/src/libraries/sign-in-experience/email-blocklist-policy.ts used the attacker-controlled domain from email input to construct subaddressingRegex when blockSubaddressing was enabled. The permissive emailRegEx accepted multiple at signs and regular expression metacharacters, and POST /api/experience/verification/verification-code could therefore cause catastrophic backtracking in subaddressingRegex.test(email). The resulting event-loop stall could make authentication, token issuance, SSO, and the administrative console unavailable. This issue is fixed in version 1.41.0.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-1333
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Deferred
- Record last updated
- Aug 21, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
logto-io logto logto_io:logto (from the name) | before 1.41.0 | CNA record |
References
- https://github.com/logto-io/logto/security/advisories/GHSA-qp7j-c3q2-g739x-refsource-confirm
- https://github.com/logto-io/logto/pull/9106x-refsource-misc
- https://github.com/logto-io/logto/commit/021381237511bc0d42f81d65df8b036b01f40547x-refsource-misc
- https://github.com/logto-io/logto/releases/tag/v1.41.0x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.