CVE-2026-15611

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreHIGH confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-23. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 4 sources updated this week
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.1Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Logto allows unverified email-based SSO account linking, enabling an attacker to register an identity at a permissive IdP using a victim’s email and gain unauthorized access to the victim’s account.

CVSS v3
9.1
EG Score
9.1(high)
EG Risk
41(Track)
EG Risk 41/100SSVC: Track

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
Severity91% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
20%
KEV
Not listed

Published

July 23, 2026

Last Modified

July 27, 2026

Advisory Details (2)

Auto-updated Jul 27, 2026
No patch confirmed yet.
generic

logto/packages/core/src/routes/experience/classes/verifications/enterprise-sso-verification.ts at ea3ede35028dfd0bbb6d7b239623ce0e7f6cdff8 · logto-io/logto · GitHub

https://github.com/logto-io/logto/blob/ea3ede35028dfd0bbb6d7b239623ce0e7f6cdff8/packages/core/src/routes/experience/classes/verifications/enterprise-sso-verification.ts#L284-L297
generic

logto/packages/core/src/libraries/verification-helpers/single-sign-on.ts at ea3ede35028dfd0bbb6d7b239623ce0e7f6cdff8 · logto-io/logto · GitHub

https://github.com/logto-io/logto/blob/ea3ede35028dfd0bbb6d7b239623ce0e7f6cdff8/packages/core/src/libraries/verification-helpers/single-sign-on.ts#L274

Vendor Advisories for CVE-2026-15611(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 36× in last 7d / 39× 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. 2026-07-31 10:10 UTCGHSA enrichment
  2. 2026-07-31 05:48 UTCGHSA enrichment
  3. 2026-07-31 01:25 UTCGHSA enrichment
  4. 2026-07-30 21:01 UTCEG score recompute
  5. 2026-07-30 21:01 UTCGHSA enrichment
  6. 2026-07-30 16:23 UTCGHSA enrichment
  7. 2026-07-30 12:00 UTCEG score recompute
  8. 2026-07-30 11:59 UTCGHSA enrichment
  9. 2026-07-30 07:36 UTCGHSA enrichment
  10. 2026-07-30 02:38 UTCEG score recompute
  11. 2026-07-30 02:38 UTCGHSA enrichment
  12. 2026-07-30 01:30 UTCEPSS rescore
  13. 2026-07-29 22:15 UTCGHSA enrichment
  14. 2026-07-29 17:52 UTCGHSA enrichment
  15. 2026-07-29 13:28 UTCGHSA enrichment
  16. 2026-07-29 09:04 UTCGHSA enrichment
  17. 2026-07-29 04:41 UTCGHSA enrichment
  18. 2026-07-29 00:17 UTCGHSA enrichment
  19. 2026-07-28 19:52 UTCEG score recompute
  20. 2026-07-28 19:52 UTCGHSA enrichment
  21. 2026-07-28 15:36 UTCEPSS rescore
  22. 2026-07-28 15:26 UTCGHSA enrichment
  23. 2026-07-28 11:03 UTCGHSA enrichment
  24. 2026-07-28 06:36 UTCGHSA enrichment
  25. 2026-07-28 02:09 UTCGHSA enrichment
Show 14 more
  1. 2026-07-27 21:45 UTCEG score recompute
  2. 2026-07-27 21:45 UTCGHSA enrichment
  3. 2026-07-27 17:20 UTCGHSA enrichment
  4. 2026-07-27 17:00 UTCEG score recompute▲ 9.10
  5. 2026-07-27 17:00 UTCGHSA enrichment
  6. 2026-07-27 17:00 UTCMITRE cvelistV5CVSS v3 → 9.1 · severity → CRITICAL
  7. 2026-07-27 14:13 UTCEPSS rescore
  8. 2026-07-26 03:07 UTCEG score recompute
  9. 2026-07-26 03:07 UTCGHSA enrichment
  10. 2026-07-25 14:17 UTCEPSS rescore
  11. 2026-07-24 14:17 UTCEPSS rescore
  12. 2026-07-23 16:20 UTCNVD update
  13. 2026-07-23 16:17 UTCEG score recompute
  14. 2026-07-23 16:16 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-15611?
CVE-2026-15611 is a critical vulnerability published on July 23, 2026. Logto allows unverified email-based SSO account linking, enabling an attacker to register an identity at a permissive IdP using a victim’s email and gain unauthorized access to the victim’s account.
When was CVE-2026-15611 disclosed?
CVE-2026-15611 was first published in the National Vulnerability Database on July 23, 2026, with the most recent update on July 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-15611 actively exploited?
CVE-2026-15611 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 80.4% of all scored CVEs.
What is the CVSS score of CVE-2026-15611?
CVE-2026-15611 has a CVSS v3.1 base score of 9.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-15611?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-15611, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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