CVE-2026-121544
Medium
Description
Koodo Reader through 2.4.6 contains a path traversal vulnerability in the self-hosted HTTP server's OPDS handlers that allows authenticated attackers to read files outside the upload directory. Attackers can upload a crafted books.db with a cover value containing ../ sequences, then request /opds/cover/{key} to read files accessible to the server process.
SeverityMedium
CVSS4.9
Exploit probability—
ProductKoodo-reader
PublishedNov 3, 2026
First seenNov 4, 2026
Weakness typeCWE-22Path traversal
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| koodo-reader koodo-reader | v ≤ 2.4.6 | — |
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