CVE-2026-15614

IdP-initiated SAML sessions not reliably invalidated (replay)

State: Published
Severity: 7.5 High
Published: Jul 23, 2026
Updated: Jul 27, 2026
Reserved: Jul 13, 2026

Description

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

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N	CISA-ADP

Weaknesses

CWE-294 Authentication Bypass by Capture-replay

Affected Products

Product	Versions
LogtoLogto	1.21.0 through 1.37.1Affected

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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