Vulnerability-Lookup

CVE-2026-76081 (GCVE-0-2026-76081)

Vulnerability from cvelistv5 – Published: 2026-09-14 21:30 – Updated: 2026-09-15 19:21

Title

ZITADEL: Improper Role Revocation on Granted Projects during Multiple Role Deletions

Summary

ZITADEL is an open source identity management platform. Prior to version 4.16.0, a bug in how ZITADEL updates permissions when multiple project roles are deleted at the same time can cause some user permissions to be missed. This issue specifically affects User Grants on Granted Projects (projects shared between different organizations), potentially allowing users to keep access rights that were supposed to be completely removed. This issue has been fully resolved in version 4.16.0. There are no configuration workarounds. Upgrading to a patched version is the only way to trigger the automatic cleanup migration. Those who cannot upgrade immediately should manually review user permissions specifically for Granted Projects where multiple roles were recently deleted.

Severity

5.5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-15 19:21 UTC

CWE

CWE-193 - Off-by-one Error

Assigner

GitHub_M mitre root

References

3 references

URL	Tags
https://github.com/zitadel/zitadel/security/advis…	x_refsource_CONFIRM
https://github.com/zitadel/zitadel/commit/9d60e83…	x_refsource_MISC
https://github.com/zitadel/zitadel/releases/tag/v4.16.0	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
zitadel	zitadel	Affected: < 4.16.0	guessed

Show details on NVD website

JSON

To clipboard

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                "id": "CVE-2026-76081",
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FKIE_CVE-2026-76081

Vulnerability from fkie_nvd - Published: 2026-09-14 22:16 - Updated: 2026-09-16 13:42

Severity

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

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/zitadel/zitadel/commit/9d60e83d6faa5e7e7a5339e031cdb26e0efe4d59
	security-advisories@github.com	https://github.com/zitadel/zitadel/releases/tag/v4.16.0
	security-advisories@github.com	https://github.com/zitadel/zitadel/security/advisories/GHSA-v859-c572-qh5p

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "zitadel",
          "vendor": "zitadel",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 4.16.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "ZITADEL is an open source identity management platform. Prior to version 4.16.0, a bug in how ZITADEL updates permissions when multiple project roles are deleted at the same time can cause some user permissions to be missed. This issue specifically affects User Grants on Granted Projects (projects shared between different organizations), potentially allowing users to keep access rights that were supposed to be completely removed. This issue has been fully resolved in version 4.16.0. There are no configuration workarounds. Upgrading to a patched version is the only way to trigger the automatic cleanup migration. Those who cannot upgrade immediately should manually review user permissions specifically for Granted Projects where multiple roles were recently deleted."
    }
  ],
  "id": "CVE-2026-76081",
  "lastModified": "2026-09-16T13:42:48.413",
  "metrics": {
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        "cvssData": {
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          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
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          "confidentialityImpact": "LOW",
          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:N",
          "version": "3.1"
        },
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        "impactScore": 4.2,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
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    "ssvcV203": [
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  "references": [
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      "url": "https://github.com/zitadel/zitadel/commit/9d60e83d6faa5e7e7a5339e031cdb26e0efe4d59"
    },
    {
      "source": "security-advisories@github.com",
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    },
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    }
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    }
  ]
}

GHSA-V859-C572-QH5P

Vulnerability from github – Published: 2026-09-14 21:31 – Updated: 2026-09-14 21:31

Summary

ZITADEL: Improper Role Revocation on Granted Projects during Multiple Role Deletions

Details

Summary

A bug in how ZITADEL updates permissions when multiple project roles are deleted at the same time can cause some user permissions to be missed. This issue specifically affects User Grants on Granted Projects (projects shared between different organizations), potentially allowing users to keep access rights that were supposed to be completely removed.

Impact

When an organization shares a project with another organization (a Project Grant), administrators can assign specific roles to users via a User Grant. If multiple roles are deleted from that project at the same time, a background process runs to strip those roles from the assigned users.

Because of an error in how ZITADEL loops through a user's list of roles during this specific cross-organization cleanup, deleting two or more roles at once might cause the system to accidentally skip over some of them.

Scope Note: This vulnerability only affects User Grants on Granted Projects. Direct project roles and global organization roles are not impacted.

The risk depends entirely on what the skipped role allowed the user to do—if it was an administrative or high-privilege role, the user could potentially retain those elevated permissions within that granted project even after the role was officially deleted.

Affected Versions

4.x: 4.0.0 through 4.15.3 (including RC versions)
3.x: 3.0.0 through 3.4.12 (including RC versions)

Note: The 3.x release channel has reached End-of-Life (EOL) for security updates and will not receive a backported patch.

Patches & Resolution

This issue has been fully resolved in the latest releases.

The update fixes the role-removal logic to ensure no roles are skipped. Furthermore, this patch includes an automatic database migration. When you update, the system will automatically scan your database, find any user permissions on granted projects that may have been accidentally left behind by this bug, and correct them.

4.x: Upgrade to $\ge$4.16.0
3.x: Update to $\ge$4.16.0 (or check out workarounds)

Workarounds

There are no configuration workarounds. Upgrading to a patched version is the recommended solution and only way to trigger the automatic cleanup migration. If you cannot upgrade immediately, we recommend manually reviewing user permissions specifically for your Granted Projects where multiple roles were recently deleted.

Questions

If you have any questions or comments about this advisory, please reach out to us at security@zitadel.com.

Credits

Thanks to AyushParkara for reporting this vulnerability.

Severity

5.5 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/zitadel/zitadel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.16.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-76081"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-193"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-09-14T21:31:37Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Summary\n\nA bug in how ZITADEL updates permissions when multiple project roles are deleted at the same time can cause some user permissions to be missed. This issue specifically affects **User Grants on Granted Projects** (projects shared between different organizations), **potentially** allowing users to keep access rights that were supposed to be completely removed.\n\n### Impact\n\nWhen an organization shares a project with another organization (a Project Grant), administrators can assign specific roles to users via a User Grant. If multiple roles are deleted from that project at the same time, a background process runs to strip those roles from the assigned users.\n\nBecause of an error in how ZITADEL loops through a user\u0027s list of roles during this specific cross-organization cleanup, deleting two or more roles at once **might** cause the system to accidentally skip over some of them.\n\n\u003e **Scope Note:** This vulnerability only affects **User Grants on Granted Projects**. Direct project roles and global organization roles are not impacted.\n\nThe risk depends entirely on what the skipped role allowed the user to do\u2014if it was an administrative or high-privilege role, the user **could potentially** retain those elevated permissions within that granted project even after the role was officially deleted.\n\n### Affected Versions\n\n* **4.x:** `4.0.0` through `4.15.3` (including RC versions)\n* **3.x:** `3.0.0` through `3.4.12` (including RC versions)\n\nNote: The 3.x release channel has reached End-of-Life (EOL) for security updates and will not receive a backported patch.\n\n### Patches \u0026 Resolution\n\nThis issue has been fully resolved in the latest releases.\n\nThe update fixes the role-removal logic to ensure no roles are skipped. Furthermore, **this patch includes an automatic database migration**. When you update, the system will automatically scan your database, find any user permissions on granted projects that **may** have been accidentally left behind by this bug, and correct them.\n\n- **4.x**: Upgrade to $\\ge$[4.16.0](https://github.com/zitadel/zitadel/releases/tag/v4.16.0)\n- **3.x**: Update to $\\ge$[4.16.0](https://github.com/zitadel/zitadel/releases/tag/v4.16.0) (or check out workarounds)\n\n### Workarounds\n\nThere are no configuration workarounds. Upgrading to a patched version is the recommended solution and only way to trigger the automatic cleanup migration. If you cannot upgrade immediately, we recommend manually reviewing user permissions specifically for your **Granted Projects** where multiple roles were recently deleted.\n\n### Questions\n\nIf you have any questions or comments about this advisory, please reach out to us at security@zitadel.com.\n\n### Credits\n\nThanks to [AyushParkara](https://github.com/AyushParkara)  for reporting this vulnerability.",
  "id": "GHSA-v859-c572-qh5p",
  "modified": "2026-09-14T21:31:37Z",
  "published": "2026-09-14T21:31:37Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/zitadel/zitadel/security/advisories/GHSA-v859-c572-qh5p"
    },
    {
      "type": "WEB",
      "url": "https://github.com/zitadel/zitadel/commit/9d60e83d6faa5e7e7a5339e031cdb26e0efe4d59"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/zitadel/zitadel"
    },
    {
      "type": "WEB",
      "url": "https://github.com/zitadel/zitadel/releases/tag/v4.16.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "ZITADEL: Improper Role Revocation on Granted Projects during Multiple Role Deletions"
}

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.
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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-2026-76081 (GCVE-0-2026-76081)

FKIE_CVE-2026-76081

GHSA-V859-C572-QH5P

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