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CVE-2026-81906: Authentication Bypass Using an Alternate Path or Channel

🗓️ 11 Sep 2026 00:00:00Reported by Rapid7Type 
rapid7
 rapid7🔗 www.rapid7.com👁 1 Views

Concrete CMS OAuth callback login path prior to version 9.5.3 did not check whether an account was active or email-validated before establishing a session. A deactivated or unvalidated user with an existing OAuth binding could complete authenticat...

Related
Refs
ReporterTitlePublishedViews
Family
circl
Circl		CVE-2026-81906
11 Sep 202600:10
–circl
cve
CVE		CVE-2026-81906
10 Sep 202623:20
–cve
cvelist
Cvelist		CVE-2026-81906 [UNREVIEWED] OAuth Callback Login Bypasses Deactivated-Account Checks
10 Sep 202623:20
–cvelist
euvd
EUVD		EUVD-2026-75888
11 Sep 202600:31
–euvd
nvd
NVD		CVE-2026-81906
11 Sep 202600:19
–nvd
ptsecurity
Positive Technologies		PT-2026-89656
10 Sep 202600:00
–ptsecurity
vulnrichment
Vulnrichment		CVE-2026-81906 [UNREVIEWED] OAuth Callback Login Bypasses Deactivated-Account Checks
10 Sep 202623:20
–vulnrichment

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11 Sep 2026 00:00Current
CVSS 46.3
EPSS0.00385
SSVC
CWE-288
1