CVE-2026-44776

Kavita is a cross platform reading server. Prior to 0.9.0, the download, size-check, and chapter metadata endpoints do not enforce library-level authorization. A low-privileged user who knows or guesses a chapterId, volumeId, or seriesId belonging to a library they are not assigned to can downloa...

CVE-2026-44776

Kavita (cross‑platform reading server) prior to 0.9.0 did not enforce library‑level authorization for several download and metadata endpoints, allowing a low‑privileged user who knows a chapterId/volumeId/seriesId to access unrelated library content. Affected endpoints include /api/Download/volum...

Hyper-V backup job fails to create shadow copy with default shadow storage limit

Challenge Backup or replication of a Hyper-V VM fails. In the Windows event logs on the Hyper-V host server, there is an error with ID 8193 from source VSS: Volume Shadow Copy Service error: Unexpected error calling routine Cannot find anymore diff area candidates for volume...

Insufficient Storage for VSS Error "0x8004231F or Error: VSSControl: -2147467259"

Challenge The following error occurs during a task that utilizes the Microsoft VSS subsystem: VSSControl: -2147467259 Backup job failed. Cannot create a shadow copy of the volumes containing writer's data. VSS asynchronous operation is not completed. Operation: Shadow copies commit. Code:...