Vulnerability-Lookup

CVE-2026-30920 (GCVE-0-2026-30920)

Vulnerability from cvelistv5 – Published: 2026-03-09 22:57 – Updated: 2026-03-10 14:14

Title

OneUptime has broken access control in GitHub App installation flow that allows unauthorized project binding

Summary

OneUptime is a solution for monitoring and managing online services. Prior to 10.0.19, OneUptime's GitHub App callback trusts attacker-controlled state and installation_id values and updates Project.gitHubAppInstallationId with isRoot: true without validating that the caller is authorized for the target project. This allows an attacker to overwrite another project's GitHub App installation binding. Related GitHub endpoints also lack effective authorization, so a valid installation ID can be used to enumerate repositories and create CodeRepository records in an arbitrary project. This vulnerability is fixed in 10.0.19.

Severity ?

8.6 (High)


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

CWE

CWE-345 - Insufficient Verification of Data Authenticity
CWE-639 - Authorization Bypass Through User-Controlled Key
CWE-862 - Missing Authorization

Assigner

GitHub_M

References

URL

Tags

https://github.com/OneUptime/oneuptime/security/a…

x_refsource_CONFIRM

Impacted products

	Vendor	Product	Version
	OneUptime	oneuptime	Affected: < 10.0.19

Show details on NVD website

JSON

To clipboard

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GHSA-656W-6F6C-M9R6

Vulnerability from github – Published: 2026-03-09 17:29 – Updated: 2026-03-10 18:44

Summary

OneUptime has broken access control in GitHub App installation flow that allows unauthorized project binding

Details

Summary

OneUptime's GitHub App callback trusts attacker-controlled state and installation_id values and updates Project.gitHubAppInstallationId with isRoot: true without validating that the caller is authorized for the target project. This allows an attacker to overwrite another project's GitHub App installation binding.

Related GitHub endpoints also lack effective authorization, so a valid installation ID can be used to enumerate repositories and create CodeRepository records in an arbitrary project.

Details

The callback decodes unsigned base64 JSON from state and uses the embedded projectId directly:

https://github.com/OneUptime/oneuptime/blob/master/Common/Server/API/GitHubAPI.ts#L34-L112

It then writes the supplied installation_id into the target project with root privileges:

await ProjectService.updateOneById({
  id: new ObjectID(projectId),
  data: { gitHubAppInstallationId: installationId },
  props: { isRoot: true },
});

The userId in state is only checked for presence, not authenticity:

https://github.com/OneUptime/oneuptime/blob/master/Common/Server/API/GitHubAPI.ts#L73-L79

The install flow also generates state as plain base64 JSON, not a signed or session-bound token:

https://github.com/OneUptime/oneuptime/blob/master/Common/Server/API/GitHubAPI.ts#L127-L165

The follow-on endpoints are also vulnerable:

Repository listing: https://github.com/OneUptime/oneuptime/blob/master/Common/Server/API/GitHubAPI.ts#L179-L258
Repository connect: https://github.com/OneUptime/oneuptime/blob/master/Common/Server/API/GitHubAPI.ts#L260-L356
Middleware allows requests with no token to continue as Public: https://github.com/OneUptime/oneuptime/blob/master/Common/Server/Middleware/UserAuthorization.ts#L205-L211
Installation tokens are minted from any valid installation ID: https://github.com/OneUptime/oneuptime/blob/master/Common/Server/Utils/CodeRepository/GitHub/GitHub.ts#L347-L425

PoC

Minimal proof of unauthorized project tampering:

STATE=$(printf '%s' '{"projectId":"<victim-project-uuid>","userId":"x"}' | base64 | tr -d '\n')
curl -isk "https://<host>/api/github/auth/callback?installation_id=999999999&state=${STATE}"

Expected result:

Server returns a 302 redirect to /dashboard/<victim-project-uuid>/code-repository?installation_id=999999999
The target project's gitHubAppInstallationId is overwritten

Impact

Unauthorized modification of Project.gitHubAppInstallationId
Temporary GitHub integration breakage if a bogus installation ID is set
Cross-project binding of attacker-controlled GitHub App installations
Repository metadata disclosure for a supplied valid installation ID
Unauthorized creation of CodeRepository records in arbitrary projects

Severity ?

8.6 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "@oneuptime/common"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "10.0.19"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-30920"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-345",
      "CWE-639",
      "CWE-862"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-09T17:29:47Z",
    "nvd_published_at": "2026-03-10T17:40:16Z",
    "severity": "HIGH"
  },
  "details": "### Summary\n\nOneUptime\u0027s GitHub App callback trusts attacker-controlled `state` and `installation_id` values and updates `Project.gitHubAppInstallationId` with `isRoot: true` without validating that the caller is authorized for the target project. This allows an attacker to overwrite another project\u0027s GitHub App installation binding.\n\nRelated GitHub endpoints also lack effective authorization, so a valid installation ID can be used to enumerate repositories and create `CodeRepository` records in an arbitrary project.\n\n### Details\n\nThe callback decodes unsigned base64 JSON from `state` and uses the embedded `projectId` directly:\n\n- https://github.com/OneUptime/oneuptime/blob/master/Common/Server/API/GitHubAPI.ts#L34-L112\n\nIt then writes the supplied `installation_id` into the target project with root privileges:\n\n```ts\nawait ProjectService.updateOneById({\n  id: new ObjectID(projectId),\n  data: { gitHubAppInstallationId: installationId },\n  props: { isRoot: true },\n});\n```\n\nThe `userId` in `state` is only checked for presence, not authenticity:\n\n- https://github.com/OneUptime/oneuptime/blob/master/Common/Server/API/GitHubAPI.ts#L73-L79\n\nThe install flow also generates `state` as plain base64 JSON, not a signed or session-bound token:\n\n- https://github.com/OneUptime/oneuptime/blob/master/Common/Server/API/GitHubAPI.ts#L127-L165\n\nThe follow-on endpoints are also vulnerable:\n\n- Repository listing: https://github.com/OneUptime/oneuptime/blob/master/Common/Server/API/GitHubAPI.ts#L179-L258\n- Repository connect: https://github.com/OneUptime/oneuptime/blob/master/Common/Server/API/GitHubAPI.ts#L260-L356\n- Middleware allows requests with no token to continue as `Public`: https://github.com/OneUptime/oneuptime/blob/master/Common/Server/Middleware/UserAuthorization.ts#L205-L211\n- Installation tokens are minted from any valid installation ID: https://github.com/OneUptime/oneuptime/blob/master/Common/Server/Utils/CodeRepository/GitHub/GitHub.ts#L347-L425\n\n### PoC\n\nMinimal proof of unauthorized project tampering:\n\n```bash\nSTATE=$(printf \u0027%s\u0027 \u0027{\"projectId\":\"\u003cvictim-project-uuid\u003e\",\"userId\":\"x\"}\u0027 | base64 | tr -d \u0027\\n\u0027)\ncurl -isk \"https://\u003chost\u003e/api/github/auth/callback?installation_id=999999999\u0026state=${STATE}\"\n```\n\nExpected result:\n\n- Server returns a `302` redirect to `/dashboard/\u003cvictim-project-uuid\u003e/code-repository?installation_id=999999999`\n- The target project\u0027s `gitHubAppInstallationId` is overwritten\n\n### Impact\n\n- Unauthorized modification of `Project.gitHubAppInstallationId`\n- Temporary GitHub integration breakage if a bogus installation ID is set\n- Cross-project binding of attacker-controlled GitHub App installations\n- Repository metadata disclosure for a supplied valid installation ID\n- Unauthorized creation of `CodeRepository` records in arbitrary projects",
  "id": "GHSA-656w-6f6c-m9r6",
  "modified": "2026-03-10T18:44:14Z",
  "published": "2026-03-09T17:29:47Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/OneUptime/oneuptime/security/advisories/GHSA-656w-6f6c-m9r6"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-30920"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/OneUptime/oneuptime"
    },
    {
      "type": "WEB",
      "url": "https://github.com/OneUptime/oneuptime/blob/master/Common/Server/API/GitHubAPI.ts#L127-L165"
    },
    {
      "type": "WEB",
      "url": "https://github.com/OneUptime/oneuptime/blob/master/Common/Server/API/GitHubAPI.ts#L179-L258"
    },
    {
      "type": "WEB",
      "url": "https://github.com/OneUptime/oneuptime/blob/master/Common/Server/API/GitHubAPI.ts#L260-L356"
    },
    {
      "type": "WEB",
      "url": "https://github.com/OneUptime/oneuptime/blob/master/Common/Server/API/GitHubAPI.ts#L34-L112"
    },
    {
      "type": "WEB",
      "url": "https://github.com/OneUptime/oneuptime/blob/master/Common/Server/API/GitHubAPI.ts#L73-L79"
    },
    {
      "type": "WEB",
      "url": "https://github.com/OneUptime/oneuptime/blob/master/Common/Server/Middleware/UserAuthorization.ts#L205-L211"
    },
    {
      "type": "WEB",
      "url": "https://github.com/OneUptime/oneuptime/blob/master/Common/Server/Utils/CodeRepository/GitHub/GitHub.ts#L347-L425"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "OneUptime has broken access control in GitHub App installation flow that allows unauthorized project binding"
}

FKIE_CVE-2026-30920

Vulnerability from fkie_nvd - Published: 2026-03-10 17:40 - Updated: 2026-03-12 13:43

Severity ?

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

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/OneUptime/oneuptime/security/advisories/GHSA-656w-6f6c-m9r6	Exploit, Vendor Advisory

Impacted products

	Vendor	Product	Version
	hackerbay	oneuptime	*

JSON

To clipboard

{
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    {
      "nodes": [
        {
          "cpeMatch": [
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    },
    {
      "lang": "es",
      "value": "OneUptime es una soluci\u00f3n para monitorear y gestionar servicios en l\u00ednea. Antes de 10.0.19, la devoluci\u00f3n de llamada de la aplicaci\u00f3n GitHub de OneUptime conf\u00eda en valores de estado y installation_id controlados por el atacante y actualiza Project.gitHubAppInstallationId con isRoot: true sin validar que el llamador est\u00e9 autorizado para el proyecto objetivo. Esto permite a un atacante sobrescribir la vinculaci\u00f3n de instalaci\u00f3n de la aplicaci\u00f3n GitHub de otro proyecto. Los puntos finales de GitHub relacionados tambi\u00e9n carecen de autorizaci\u00f3n efectiva, por lo que un ID de instalaci\u00f3n v\u00e1lido puede ser utilizado para enumerar repositorios y crear registros de CodeRepository en un proyecto arbitrario. Esta vulnerabilidad se corrige en 10.0.19."
    }
  ],
  "id": "CVE-2026-30920",
  "lastModified": "2026-03-12T13:43:38.543",
  "metrics": {
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        "source": "security-advisories@github.com",
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  },
  "published": "2026-03-10T17:40:16.000",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/OneUptime/oneuptime/security/advisories/GHSA-656w-6f6c-m9r6"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-345"
        },
        {
          "lang": "en",
          "value": "CWE-639"
        },
        {
          "lang": "en",
          "value": "CWE-862"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

CVE-2026-30920 (GCVE-0-2026-30920)

GHSA-656W-6F6C-M9R6

Summary

Details

PoC

Impact

FKIE_CVE-2026-30920

Tags

Sightings

Nomenclature