CVE-2026-88898 json
AppFlowy-Cloud 0.7.2 through 0.9.64 Missing Workspace Authorization on Bulk Publish Endpoint
published 2026-09-10 1 mo ago modified 2026-09-10 1 mo ago also EUVD-2026-75543
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 33%
- public exploits
- 0
- none known
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.
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 1 mo ago
Exploit prediction
0.39% chance of exploitation in the next 30 days, higher than 33% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- gist.github.com https://gist.github.com/mtholmquist/ab550712a4628c7c7c4705bceccd93b3 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 7.1 | 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 |
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N |
| CNA | 4.0 | 7.1 | 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 |
Affected products
- AppFlowy-IO AppFlowy-Cloud
Classification
- Weakness
-
- CWE-862 Missing Authorization
References
-
gist.github.com
/mtholmquist/ab550712a4628c7c7c4705bceccd93b3
technical-description, exploit
-
github.com
/AppFlowy-IO/AppFlowy-Cloud
product
-
github.com
/AppFlowy-IO/AppFlowy-Cloud/blob/0.9.64/src/biz/workspace/publish.rs
technical-description
-
github.com
/AppFlowy-IO/AppFlowy-Cloud/blob/0.9.64/src/api/workspace.rs
technical-description
-
vulncheck.com
/advisories/appflowy-cloud-0.7.2-through-0.9.64-missing-workspace-authorization-on-bulk-publish-endpoint
third-party-advisory
Sources
- CVE List CVE-2026-88898
- NVD CVE-2026-88898
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.