CVE-2026-77167
HIGH
NVD
CVSS Score
7.5
Severity
HIGH
Published
Oct 27, 2026
Vendor
unknown
Description
Abusing the federated share endpoint, an attacker can write arbitrary rows into the oc_share_external database table. These rows persist indefinitely — there is no automatic cleanup mechanism. Three distinct denial-of-service conditions follow from this write primitive, all triggered from the same unauthenticated source and all self-renewing on a 24-hour cycle for as long as the injected rows remain in the database.