Vulnerability record · CVE-2026-72780 · published 11 August 2026

CVE-2026-72780: Authentication bypass by capture-replay vulnerability

Craft CMS before 5.10.5 fails to persist updated credential counters after WebAuthn assertion validation in the passkey login endpoint. Attackers can replay captured login request bodies containing requestOptions and response to create additional authenticated sessions for victim accounts.

7.1 CVSS 4.0 High EPSS 0.39% · top 70.1% CWE-294 · Authentication bypass by capture-replay Deferred

7.1CVSS 4.0 base score

0.39%EPSS exploitation probability, 30 days

NoNot in CISA KEV

0Affected product versions listed by NVD

2References

28 Aug 2026Last modified by NVD

Description

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

Link	Tags
https://github.com/craftcms/cms/security/advisories/GHSA-wg23-69c2-gjc8
https://www.vulncheck.com/advisories/craft-cms-before-webauthn-assertion-replay-via-login-with-passkey

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2023-23397Microsoft Outlook improper input validation privilege escalationCVE-2023-23397 is a critical elevation of privilege flaw in Microsoft Outlook caused by improper input validation and an authentication bypass by cap…KEVEPSS 97%analysed14 Mar 2023

Source: NIST National Vulnerability Database (record CVE-2026-72780), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.