CVE-2026-62317

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.7% (53rd percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Elevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 7.5Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

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 v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
65
EG Risk 65/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.7%
EPSS %ILE
53rd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 19, 2026

Last Modified

September 9, 2026

Advisory Details (4)

Auto-updated Aug 19, 2026
Patch available. Sources: github, github_pr, github_commit, github_release.
github_release Patch Available

v1.41.0

Patch available: logto-io/logto v1.41.0

https://github.com/logto-io/logto/releases/tag/v1.41.0
github_commit Patch Available

commit 021381237511 (logto-io/logto)

Patch available: logto-io/logto v1.41.0 (contains commit 021381237511)

https://github.com/logto-io/logto/commit/021381237511bc0d42f81d65df8b036b01f40547
github_pr Patch Available

fix(core): avoid regex in email subaddressing blocklist check

Patch available: logto-io/logto v1.41.0 (PR #9106 merged 2026-06-30)

https://github.com/logto-io/logto/pull/9106
githubMentions a patch (unverified)

ReDoS via unescaped user input in email subaddressing regex (blockSubaddressing) · Advisory · logto-io/logto · GitHub

https://github.com/logto-io/logto/security/advisories/GHSA-qp7j-c3q2-g739

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 45× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-10-10 20:00 UTCEPSS rescore
  2. 2026-10-09 20:07 UTCEPSS rescore
  3. 2026-10-08 17:13 UTCEPSS rescore
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  18. 2026-09-30 20:34 UTCEG score recompute
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  25. 2026-09-26 15:59 UTCEPSS rescore
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  1. 2026-09-24 19:42 UTCEG score recompute
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  3. 2026-09-23 17:54 UTCEPSS rescore
  4. 2026-09-22 19:49 UTCEG score recompute
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  7. 2026-09-20 20:16 UTCEPSS rescore
  8. 2026-09-19 22:43 UTCEG score recompute
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  19. 2026-09-11 14:53 UTCEPSS rescore
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  21. 2026-09-10 10:01 UTCEG score recompute
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  25. 2026-09-07 16:01 UTCEPSS rescore
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  31. 2026-09-04 05:07 UTCEPSS rescore
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  40. 2026-08-30 12:09 UTCEG score recompute
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  42. 2026-08-29 01:47 UTCEG score recompute
  43. 2026-08-28 21:42 UTCEPSS rescore
  44. 2026-08-28 00:54 UTCEG score recompute
  45. 2026-08-27 14:25 UTCEPSS rescore
  46. 2026-08-27 02:05 UTCEG score recompute
  47. 2026-08-26 14:46 UTCEPSS rescore
  48. 2026-08-25 15:51 UTCEG score recompute
  49. 2026-08-25 13:49 UTCEPSS rescore
  50. 2026-08-24 17:01 UTCEG score recompute
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  53. 2026-08-22 07:48 UTCEG score recompute
  54. 2026-08-21 23:49 UTCEPSS rescore
  55. 2026-08-21 20:23 UTCEG score recompute
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  57. 2026-08-21 06:33 UTCEG score recompute
  58. 2026-08-20 22:55 UTCEPSS rescore
  59. 2026-08-19 20:20 UTCEG score recompute
  60. 2026-08-19 19:43 UTCEG score recompute
  61. 2026-08-19 19:42 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-62317?
CVE-2026-62317 is a high vulnerability published on August 19, 2026. 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…
When was CVE-2026-62317 disclosed?
CVE-2026-62317 was first published on August 19, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-62317 actively exploited?
CVE-2026-62317 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (53rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-62317?
CVE-2026-62317 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-62317?
A fix for CVE-2026-62317 is available: update to the fixed version the vendor names in its advisory.

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