Medium severity · published Aug 11, 2026
CVE-2026-72780
Craft CMS before 5.10.5 WebAuthn Assertion Replay via login-with-passkey
6.5
CVSS
0.4%
EPSS
No
On KEV
Description
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:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 32% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CM
cms · craftcms
5.0.0-RC1 before 5.10.5 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-72780
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-72780
vendor-advisory
https://github.com/craftcms/cms/security/advisories/GHSA-wg23-69c2-gjc8
third-party-advisory
https://www.vulncheck.com/advisories/craft-cms-before-webauthn-assertion-replay-via-login-with-passkey
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