CVE Explorer
CVE-2026-39410
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.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"hono","vendor":"honojs","versions":[{"status":"affected","version":"< 4.12.12"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:f1a7b82c72adddb5f805c93d25685ef7f7d2f6681240ccff500a44765146c336 · sha256:9cc360c740df214d… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.8,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:f1a7b82c72adddb5f805c93d25685ef7f7d2f6681240ccff500a44765146c336 · sha256:9cc360c740df214d… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-20","description":"CWE-20: Improper Input Validation","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:f1a7b82c72adddb5f805c93d25685ef7f7d2f6681240ccff500a44765146c336 · sha256:9cc360c740df214d… · /containers/cna/problemTypes/0/descriptions/0
Source references
3 source assertions{"name":"https://github.com/honojs/hono/commit/cc067c85592415cb1880ad3c61ed923472452ec0","tags":["x_refsource_MISC"],"url":"https://github.com/honojs/hono/commit/cc067c85592415cb1880ad3c61ed923472452ec0"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:f1a7b82c72adddb5f805c93d25685ef7f7d2f6681240ccff500a44765146c336 · sha256:9cc360c740df214d… · /containers/cna/references/1
{"name":"https://github.com/honojs/hono/releases/tag/v4.12.12","tags":["x_refsource_MISC"],"url":"https://github.com/honojs/hono/releases/tag/v4.12.12"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:f1a7b82c72adddb5f805c93d25685ef7f7d2f6681240ccff500a44765146c336 · sha256:9cc360c740df214d… · /containers/cna/references/2
{"name":"https://github.com/honojs/hono/security/advisories/GHSA-r5rp-j6wh-rvv4","tags":["x_refsource_CONFIRM"],"url":"https://github.com/honojs/hono/security/advisories/GHSA-r5rp-j6wh-rvv4"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:f1a7b82c72adddb5f805c93d25685ef7f7d2f6681240ccff500a44765146c336 · sha256:9cc360c740df214d… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.