CVE-2026-56223
Cross-domain SSO account takeover via forged SAML in Capgo.
Is CVE-2026-56223 being exploited?
Not confirmed. CVE-2026-56223 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.40% probability of exploitation in the next 30 days.
How severe is CVE-2026-56223?
CVE-2026-56223 is rated Critical with a CVSS score of 9.3. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-56223?
Yes. A fix has been recorded for CVE-2026-56223. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-56223 affect?
CVE-2026-56223 affects Capgo Platform (pre-12.128.2). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-56223?
Patch to 12.128.2+; review IdP trust; rotate SAML keys
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Org admin with a malicious IdP can forge SAML to merge victims' accounts, gaining full access to their data and org resources.
Immediate action required
- affected< 12.128.2
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.