CVE-2026-88898

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.38% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 32.6% of scored records. A rank, not a probability.

NVD base score

7.1 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Deferred. NVD last modified this record on 2026-09-10.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-09-10 14:46Z1 MO AGO

Last updated

2026-09-10 14:59Z1 MO AGO

Reserved

2026-09-10

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

High (CVSS 7.1)

CNA CVSS vector

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

Weaknesses

• CWE-862Missing AuthorizationClass

Data version

5.2

Document digest

bfdf5aef7dd251828493699fd0002e9a3ea023c3009b845a39a859732461b943

• gist.github.comAppFlowy-Cloud: bulk publish endpoint performs no workspace authorizationhttps://gist.github.com/mtholmquist/ab550712a4628c7c7c4705bceccd93b3technical-descriptionexploit
• github.comhttps://github.com/AppFlowy-IO/AppFlowy-Cloudproduct
• github.comhttps://github.com/AppFlowy-IO/AppFlowy-Cloud/blob/0.9.64/src/biz/workspace/publish.rstechnical-description
• github.comhttps://github.com/AppFlowy-IO/AppFlowy-Cloud/blob/0.9.64/src/api/workspace.rstechnical-description
• www.vulncheck.comVulnCheck Advisory: AppFlowy-Cloud 0.7.2 through 0.9.64 Missing Workspace Authorization on Bulk Publish Endpointhttps://www.vulncheck.com/advisories/appflowy-cloud-0.7.2-through-0.9.64-missing-workspace-authorization-on-bulk-publish-endpointthird-party-advisory