Vulnerability-Lookup

CVE-2026-56327 (GCVE-0-2026-56327)

Vulnerability from cvelistv5 – Published: 2026-06-30 22:08 – Updated: 2026-07-01 13:19

Title

Capgo - Unauthenticated Organization Existence Oracle via public.invite_user_to_org RPC

Summary

Capgo before 12.128.2 contains an information disclosure vulnerability in the public.invite_user_to_org RPC function that allows unauthenticated attackers to enumerate organization existence by observing distinct error responses. Attackers can call the SECURITY DEFINER function with a publishable API key to determine if an organization ID exists based on NO_ORG versus NO_RIGHTS responses, enabling tenant enumeration attacks.

Severity

6.9 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-01 13:17 UTC

CWE

CWE-203 - Observable Discrepancy

Assigner

VulnCheck mitre root

References

2 references

URL	Tags
https://github.com/Cap-go/capgo/security/advisori…	vendor-advisory
https://www.vulncheck.com/advisories/capgo-unauth…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
Capgo	Capgo	Affected: 0 , < 12.128.2 (semver) Unaffected: 12.128.2 (semver)	guessed

Date Public

2026-03-17 00:00

Credits

Judel777

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-56327

Vulnerability from fkie_nvd - Published: 2026-06-30 23:17 - Updated: 2026-07-01 14:16

Severity

5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Summary

References

	URL	Tags
	disclosure@vulncheck.com	https://github.com/Cap-go/capgo/security/advisories/GHSA-35q8-ghfg-vp6m
	disclosure@vulncheck.com	https://www.vulncheck.com/advisories/capgo-unauthenticated-organization-existence-oracle-via-public-invite-user-to-org-rpc
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/Cap-go/capgo/security/advisories/GHSA-35q8-ghfg-vp6m

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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          "defaultStatus": "unaffected",
          "product": "Capgo",
          "vendor": "Capgo",
          "versions": [
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  "lastModified": "2026-07-01T14:16:46.123",
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  "vulnStatus": "Deferred",
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}

GHSA-443M-F58X-JX9J

Vulnerability from github – Published: 2026-07-01 00:34 – Updated: 2026-07-01 00:34

Details

Severity

5.3 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

6.9 (Medium)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

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  "affected": [],
  "aliases": [
    "CVE-2026-56327"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-203"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-30T23:17:30Z",
    "severity": "MODERATE"
  },
  "details": "Capgo before 12.128.2 contains an information disclosure vulnerability in the public.invite_user_to_org RPC function that allows unauthenticated attackers to enumerate organization existence by observing distinct error responses. Attackers can call the SECURITY DEFINER function with a publishable API key to determine if an organization ID exists based on NO_ORG versus NO_RIGHTS responses, enabling tenant enumeration attacks.",
  "id": "GHSA-443m-f58x-jx9j",
  "modified": "2026-07-01T00:34:13Z",
  "published": "2026-07-01T00:34:13Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/Cap-go/capgo/security/advisories/GHSA-35q8-ghfg-vp6m"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56327"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/capgo-unauthenticated-organization-existence-oracle-via-public-invite-user-to-org-rpc"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-56327 (GCVE-0-2026-56327)

FKIE_CVE-2026-56327

GHSA-443M-F58X-JX9J

Tags

Sightings

Nomenclature

Related by attack behaviour