Detections
Analytics
CVE-2026-39410
medium
Description
Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.12, a discrepancy between browser cookie parsing and parse() handling allows cookie prefix protections to be bypassed. Cookie names that are treated as distinct by the browser may be normalized to the same key by parse(), allowing attacker-controlled cookies to override legitimate ones. This vulnerability is fixed in 4.12.12.
References
https://github.com/honojs/hono/security/advisories/GHSA-r5rp-j6wh-rvv4
https://github.com/honojs/hono/releases/tag/v4.12.12
https://github.com/honojs/hono/commit/cc067c85592415cb1880ad3c61ed923472452ec0