CVE Explorer

CVE-2026-54287

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.25, on AWS Lambda, the ALB single-header response and the VPC Lattice v2 response join multiple Set-Cookie headers into one comma-separated value. Because commas also appear inside cookie attributes (for example Expires dates), clients cannot split the value back into individual cookies and silently drop or misparse them. This vulnerability is fixed in 4.12.25.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:ea8a4e5dbc580f951157cfcc6a27dd1be433d688bafe2703ea424b757a3d7609

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"hono","vendor":"honojs","versions":[{"status":"affected","version":"< 4.12.25"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:84b306fdf564c59a300e95cdd9dde469bcd9525525cf0407673d2747e3281a32 · sha256:300f81a989097399… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:84b306fdf564c59a300e95cdd9dde469bcd9525525cf0407673d2747e3281a32 · sha256:300f81a989097399… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion

{"cweId":"CWE-116","description":"CWE-116: Improper Encoding or Escaping of Output","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:84b306fdf564c59a300e95cdd9dde469bcd9525525cf0407673d2747e3281a32 · sha256:300f81a989097399… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion

{"name":"https://github.com/honojs/hono/security/advisories/GHSA-j6c9-x7qj-28xf","tags":["x_refsource_CONFIRM"],"url":"https://github.com/honojs/hono/security/advisories/GHSA-j6c9-x7qj-28xf"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:84b306fdf564c59a300e95cdd9dde469bcd9525525cf0407673d2747e3281a32 · sha256:300f81a989097399… · /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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