How severe is CVE-2026-15616?

CVE-2026-15616 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-15616 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-15616?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2026-15616 published?

CVE-2026-15616 was published on 2026-07-23 and last updated on 2026-07-27.

CVE-2026-15616

CVE-2026-15616 is a critical-severity vulnerability with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-308.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-308
Published: 2026-07-23
Last modified: 2026-07-27

Description

Logto does not enforce locally configured MFA during SSO authentication, allowing users to bypass second-factor requirements and grants unauthorized access.

Frequently asked questions

What is CVE-2026-15616?: Logto does not enforce locally configured MFA during SSO authentication, allowing users to bypass second-factor requirements and grants unauthorized access.
How severe is CVE-2026-15616?: CVE-2026-15616 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-15616 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-15616?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2026-15616 published?: CVE-2026-15616 was published on 2026-07-23 and last updated on 2026-07-27.

References

https://github.com/logto-io/logto/blob/ea3ede35028dfd0bbb6d7b239623ce0e7f6cdff8/packages/core/src/routes/experience/classes/experience-interaction.ts#L538-L540

Other CWE-308 vulnerabilities

CVE-2023-49075 — High (CVSS 8.4): The Admin Classic Bundle provides a Backend UI for Pimcore. `AdminBundle\Security\PimcoreUserTwoFactorCondition`…
CVE-2026-67611 — High (CVSS 8.1): OpenEMR through 8.2.0 contains an authentication bypass vulnerability that allows attackers with valid credentials to…
CVE-2026-45749 — High (CVSS 8.1): Termix is a web-based server management platform with SSH terminal, tunneling, and file editing capabilities. The `POST…
CVE-2025-42959 — High (CVSS 8.1): An unauthenticated attacker may exploit a scenario where a Hashed Message Authentication Code (HMAC) credential,…
CVE-2024-47652 — High (CVSS 8.1): This vulnerability exists in Shilpi Client Dashboard due to implementation of inadequate authentication mechanism in…
CVE-2024-27928 — Medium (CVSS 5.9): vantage6 is an open-source infrastructure for privacy preserving analysis. Prior to version 5.0.0, if an attacker hacks…

Browse all CWE-308 vulnerabilities →