CVE-2026-56336Public exploitNetwork attack vector

Tenant reconnaissance via excessive SSO response data

Published Jul 12, 2026 · Updated Jul 12, 2026

Information disclosure in Capgo before 12.128.2 allows remote attackers to obtain organization and SSO provider IDs without authentication. The bare POST handler in /private/sso/check-domain uses an anonymous Supabase context and serializes unused provider_id and org_id fields into its JSON response. Any unauthenticated caller with an SSO-configured email domain can map that domain to internal identifiers, but the disclosed values alone grant no direct tenant access.

CVSS severity6.9
Medium
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Capgo before 12.128.2 allows remote attackers to obtain organization and SSO provider IDs without authentication. The bare POST handler in /private/sso/check-domain uses an anonymous Supabase context and serializes unused provider_id and org_id fields into its JSON response. Any unauthenticated caller with an SSO-configured email domain can map that domain to internal identifiers, but the disclosed values alone grant no direct tenant access.

The record

CVE
CVE-2026-56336
Published
Jul 12, 2026
Updated
Jul 12, 2026
Vendor
Capgo
Product
Capgo
Classifications
CWE-200, T1595
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <12.128.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Capgo · Capgoversion=0 <12.128.2

Published CVSS scores

6.9VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
5.3GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1595Active Scanning

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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