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CVE-2026-56223

Capgo before 12.128.2 contains a cross-domain SSO account takeover vulnerability in the provision-user endpoint that allows attackers to merge arbitrary victim accounts based on email match without validating SSO provider domain authorization. An attacker with enterprise org admin access and a malicious IdP can forge SAML assertions containing victim email addresses to trigger account merge and gain full access to victim accounts, organizations, and data.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:9d97f961a96f6399785d82936ddb9acdc1a3421747ce3346049ee49e6d07a027
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":9.3,"baseSeverity":"CRITICAL","privilegesRequired":"HIGH","subAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:d2a057cecf01ace546831a498c96af03bbe590c4f78b4c984d9e324bbba49a07 · sha256:8f7e23cecc76f2f3… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.7,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"HIGH","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:d2a057cecf01ace546831a498c96af03bbe590c4f78b4c984d9e324bbba49a07 · sha256:8f7e23cecc76f2f3… · /containers/cna/metrics/1/cvssV3_1

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","packageURL":"pkg:npm/capgo-app","product":"Capgo","vendor":"Capgo","versions":[{"lessThan":"12.128.2","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"12.128.2","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d2a057cecf01ace546831a498c96af03bbe590c4f78b4c984d9e324bbba49a07 · sha256:8f7e23cecc76f2f3… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":9.3,"baseSeverity":"CRITICAL","privilegesRequired":"HIGH","subAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:d2a057cecf01ace546831a498c96af03bbe590c4f78b4c984d9e324bbba49a07 · sha256:8f7e23cecc76f2f3… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.7,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"HIGH","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:d2a057cecf01ace546831a498c96af03bbe590c4f78b4c984d9e324bbba49a07 · sha256:8f7e23cecc76f2f3… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-287","description":"Improper Authentication","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:d2a057cecf01ace546831a498c96af03bbe590c4f78b4c984d9e324bbba49a07 · sha256:8f7e23cecc76f2f3… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"GitHub Security Advisory (GHSA-jhjh-vp9p-54fg)","tags":["vendor-advisory"],"url":"https://github.com/Cap-go/capgo/security/advisories/GHSA-jhjh-vp9p-54fg"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d2a057cecf01ace546831a498c96af03bbe590c4f78b4c984d9e324bbba49a07 · sha256:8f7e23cecc76f2f3… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/Cap-go/capgo/security/advisories/GHSA-jhjh-vp9p-54fg"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d2a057cecf01ace546831a498c96af03bbe590c4f78b4c984d9e324bbba49a07 · sha256:8f7e23cecc76f2f3… · /containers/adp/0/references/0
{"name":"VulnCheck Advisory: Capgo - Account Takeover via Cross-Domain SSO Email Assertion in provision-user","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/capgo-account-takeover-via-cross-domain-sso-email-assertion-in-provision-user"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d2a057cecf01ace546831a498c96af03bbe590c4f78b4c984d9e324bbba49a07 · sha256:8f7e23cecc76f2f3… · /containers/cna/references/1

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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