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CVE-2026-29086

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to version 4.12.4, the setCookie() utility did not validate semicolons (;), carriage returns (\r), or newline characters (\n) in the domain and path options when constructing the Set-Cookie header. Because cookie attributes are delimited by semicolons, this could allow injection of additional cookie attributes if untrusted input was passed into these fields. This issue has been patched in version 4.12.4.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:9a770de2034057e4e2a8df756dcf1d7f0cbdcb8292ec9095cfbf8b333b8a0065
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":"< 4.12.4"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:fa44a985d759accb22b171b67fa65109511890a62a20e90e4112812692c6b300 · sha256:af513aeac61487a9… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:fa44a985d759accb22b171b67fa65109511890a62a20e90e4112812692c6b300 · sha256:af513aeac61487a9… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-1113","description":"CWE-1113: Inappropriate Comment Style","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:fa44a985d759accb22b171b67fa65109511890a62a20e90e4112812692c6b300 · sha256:af513aeac61487a9… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/honojs/hono/commit/44ae0c8cc4d5ab2bed529127a4ac72e1483ad073","tags":["x_refsource_MISC"],"url":"https://github.com/honojs/hono/commit/44ae0c8cc4d5ab2bed529127a4ac72e1483ad073"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:fa44a985d759accb22b171b67fa65109511890a62a20e90e4112812692c6b300 · sha256:af513aeac61487a9… · /containers/cna/references/1
{"name":"https://github.com/honojs/hono/security/advisories/GHSA-5pq2-9x2x-5p6w","tags":["x_refsource_CONFIRM"],"url":"https://github.com/honojs/hono/security/advisories/GHSA-5pq2-9x2x-5p6w"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:fa44a985d759accb22b171b67fa65109511890a62a20e90e4112812692c6b300 · sha256:af513aeac61487a9… · /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.

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