CVE-2026-72780 PUBLISHED

Craft CMS before 5.10.5 WebAuthn Assertion Replay via login-with-passkey

Assigner: VulnCheck
Reserved: 10.08.2026 Published: 11.08.2026 Updated: 11.08.2026

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.

CVSS Vector: 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
CVSS Score: 7.1

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS Score: 6.5

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	Low	Integrity Impact	None
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	craftcms
Product	cms
Versions	Default: unaffected affected from 5.0.0-RC1 to 5.10.5 (excl.) Version 5.10.5 is unaffected

References

Problem Types

Authentication Bypass by Capture-replay CWE