CVE-2026-77167
HighCVSS 7.5Exploitation Probability (EPSS)
Low risk25th percentile - higher than 25% of all known CVEs
Summary
By abusing the federated share endpoint, an attacker can write arbitrary rows into the oc_share_external database table. These rows persist indefinitely because there is no automatic cleanup mechanism, leading to three distinct denial-of-service conditions that self-renew on a 24-hour cycle.
Risk Assessment
An unauthenticated attacker can trigger recurring denial-of-service conditions that persist as long as the injected rows remain in the database. This can disrupt service availability.
Recommendation
Apply the vendor patch that prevents row injection via the federated share endpoint. Additionally, implement monitoring and cleanup of the oc_share_external table.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS