What’s Vulnerable › Vulnerabilities

CVE-2026-15614: IdP-initiated SAML sessions not reliably invalidated (replay)

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-23 · updated 2026-07-27
• Weakness: CWE-294

Description

Logto silently fails to delete IdP-initiated SAML sessions, enabling session replay and reuse within the session’s validity window.

Affected products

• Logto: from 1.21.0 through 1.37.1

References

• https://github.com/logto-io/logto/blob/ea3ede35028dfd0bbb6d7b239623ce0e7f6cdff8/packages/core/src/libraries/verification-helpers/single-sign-on.ts#L81-L99

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