CVE-2026-56339Public exploitNetwork attack vector

Unauthenticated organization enumeration via divergent RPC errors

Published Jul 15, 2026 · Updated Jul 15, 2026

Information disclosure in Capgo before 12.128.2 allows remote attackers to enumerate organizations through a public Supabase RPC. The SECURITY DEFINER public.rescind_invitation function accepts an organization ID from anonymous callers and returns NO_ORG for nonexistent IDs but NO_RIGHTS for existing IDs. Possession of the publishable API key is sufficient to distinguish valid tenant identifiers, disclosing organization existence for reconnaissance without granting access to organization data.

CVSS severity8.7
High
EPSS probability0.46%
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 enumerate organizations through a public Supabase RPC. The SECURITY DEFINER public.rescind_invitation function accepts an organization ID from anonymous callers and returns NO_ORG for nonexistent IDs but NO_RIGHTS for existing IDs. Possession of the publishable API key is sufficient to distinguish valid tenant identifiers, disclosing organization existence for reconnaissance without granting access to organization data.

The record

CVE
CVE-2026-56339
Published
Jul 15, 2026
Updated
Jul 15, 2026
Vendor
Capgo
Product
Capgo
Classifications
CWE-203, T1591
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 15, 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

7.5VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-203Observable Discrepancy
T1591Gather Victim Org Information

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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