CVE-2026-121544
Koodo Reader through 2.4.6 Path Traversal via OPDS Cover and Download Handlers
CVSS Score
4.9
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-22 |
| Vendor | koodo-reader |
| Product | koodo-reader |
| Published | Nov 3, 2026 |
| Last Updated | Nov 3, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
koodo-reader / koodo-reader
0 ≤ 2.4.6
References
github.com: https://github.com/koodo-reader/koodo-reader/issues/1654 github.com: https://github.com/koodo-reader/koodo-reader github.com: https://github.com/koodo-reader/koodo-reader/commit/cbc79a1ab5cbbd61c8252d6ab3cc6dbb694663b8 github.com: https://github.com/koodo-reader/koodo-reader/blob/v2.4.6/httpserver/opds.go#L167-L194 github.com: https://github.com/koodo-reader/koodo-reader/blob/v2.4.6/httpserver/opds.go#L384-L431 github.com: https://github.com/koodo-reader/koodo-reader/compare/205539043b0a2afd9fd8bf99ef8434bd1833c2bf...cbc79a1ab5cbbd61c8252d6ab3cc6dbb694663b8 vulncheck.com: https://www.vulncheck.com/advisories/koodo-reader-through-2.4.6-path-traversal-via-opds-cover-and-download-handlers
Credits
George Chen