Vulnerability-Lookup

CVE-2026-88898 (GCVE-0-2026-88898)

Vulnerability from cvelistv5 – Published: 2026-09-10 14:46 – Updated: 2026-09-10 14:59

Title

AppFlowy-Cloud 0.7.2 through 0.9.64 Missing Workspace Authorization on Bulk Publish Endpoint

Summary

AppFlowy-Cloud versions 0.7.2 through 0.9.64 fail to authorize callers against the workspace in the bulk publish endpoint path, allowing authenticated users to publish content into other tenants' namespaces. Attackers can write published views with attacker-controlled title, body and metadata into victim workspaces to deface public pages or host phishing content on trusted URLs.

Severity

7.1 (High)


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

6.5 (Medium)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-10 14:58 UTC

CWE

CWE-862 - Missing Authorization

Assigner

VulnCheck mitre root

References

5 references

URL	Tags
https://gist.github.com/mtholmquist/ab550712a4628…	technical-descriptionexploit
https://github.com/AppFlowy-IO/AppFlowy-Cloud	product
https://github.com/AppFlowy-IO/AppFlowy-Cloud/blo…	technical-description
https://github.com/AppFlowy-IO/AppFlowy-Cloud/blo…	technical-description
https://www.vulncheck.com/advisories/appflowy-clo…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
AppFlowy-IO	AppFlowy-Cloud	Affected: 0.7.2 , ≤ 0.9.64 (custom)	guessed

Date Public

2026-09-09 00:00

Credits

Michael Holmquist

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-88898

Vulnerability from fkie_nvd - Published: 2026-09-10 15:17 - Updated: 2026-09-10 16:18

Severity

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

Summary

References

	URL	Tags
	disclosure@vulncheck.com	https://gist.github.com/mtholmquist/ab550712a4628c7c7c4705bceccd93b3
	disclosure@vulncheck.com	https://github.com/AppFlowy-IO/AppFlowy-Cloud
	disclosure@vulncheck.com	https://github.com/AppFlowy-IO/AppFlowy-Cloud/blob/0.9.64/src/api/workspace.rs
	disclosure@vulncheck.com	https://github.com/AppFlowy-IO/AppFlowy-Cloud/blob/0.9.64/src/biz/workspace/publish.rs
	disclosure@vulncheck.com	https://www.vulncheck.com/advisories/appflowy-cloud-0.7.2-through-0.9.64-missing-workspace-authorization-on-bulk-publish-endpoint

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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GHSA-8P2P-FV97-R9WW

Vulnerability from github – Published: 2026-09-10 15:33 – Updated: 2026-09-10 15:33

Details

Severity

6.5 (Medium)


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

7.1 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-88898"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-862"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-10T15:17:59Z",
    "severity": "HIGH"
  },
  "details": "AppFlowy-Cloud versions 0.7.2 through 0.9.64 fail to authorize callers against the workspace in the bulk publish endpoint path, allowing authenticated users to publish content into other tenants\u0027 namespaces. Attackers can write published views with attacker-controlled title, body and metadata into victim workspaces to deface public pages or host phishing content on trusted URLs.",
  "id": "GHSA-8p2p-fv97-r9ww",
  "modified": "2026-09-10T15:33:21Z",
  "published": "2026-09-10T15:33:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-88898"
    },
    {
      "type": "WEB",
      "url": "https://gist.github.com/mtholmquist/ab550712a4628c7c7c4705bceccd93b3"
    },
    {
      "type": "WEB",
      "url": "https://github.com/AppFlowy-IO/AppFlowy-Cloud"
    },
    {
      "type": "WEB",
      "url": "https://github.com/AppFlowy-IO/AppFlowy-Cloud/blob/0.9.64/src/api/workspace.rs"
    },
    {
      "type": "WEB",
      "url": "https://github.com/AppFlowy-IO/AppFlowy-Cloud/blob/0.9.64/src/biz/workspace/publish.rs"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/appflowy-cloud-0.7.2-through-0.9.64-missing-workspace-authorization-on-bulk-publish-endpoint"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/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.

Action not permitted

CVE-2026-88898 (GCVE-0-2026-88898)

FKIE_CVE-2026-88898

GHSA-8P2P-FV97-R9WW

Tags

Sightings

Nomenclature