{"schemaVersion":3,"id":"CVE-2026-22818","aliases":["CGA-25p2-473w-2vh7","CGA-c4v2-6w22-m985","GHSA-3vhc-576x-3qv4","CGA-2jvv-3v5r-6qcr","CGA-3626-6458-mcjq","CGA-4g9r-796q-565c","CGA-5f4x-gh47-m4mj","CGA-62hc-wgc7-h82j","CGA-653c-2cgc-p62f","CGA-f22g-wmvf-r599","CGA-g879-x6xv-v8fx","CGA-ghm5-rhw3-q5pw","CGA-hwhj-rxfq-8hg5","CGA-j4qr-9fqq-8cvw","CGA-jwj8-67f8-m6cr","CGA-r2g4-23r3-79f3","CGA-r6mp-67g4-8x74","CGA-rm7v-f4px-2hj9","CGA-vhgg-v5h5-qrwq"],"status":"published","duplicateOf":null,"title":null,"description":"Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.11.4, there is a flaw in Hono’s JWK/JWKS JWT verification middleware allowed the algorithm specified in the JWT header to influence signature verification when the selected JWK did not explicitly define an algorithm. This could enable JWT algorithm confusion and, in certain configurations, allow forged tokens to be accepted. The JWK/JWKS JWT verification middleware has been updated to require an explicit allowlist of asymmetric algorithms when verifying tokens. The middleware no longer derives the verification algorithm from untrusted JWT header values. This vulnerability is fixed in 4.11.4.","dates":{"published":"2026-01-13T19:49:52.042Z","modified":"2026-01-15T15:29:39.849Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":8.2,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":8.2,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Wolfi","score":8.2,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N","exploitability":10,"impact":7,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Npm","score":8.2,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N","exploitability":10,"impact":7,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Chainguard","score":8.2,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N","exploitability":10,"impact":7,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00138,"percentile":0.02867,"severity":"low","asOf":"2026-10-21T00:00:00.000Z","change":{"pp":0.0019999999999999836,"baselineDate":"2026-09-21T00:00:00.000Z","baselineScore":0.00136},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00139,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00139,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00139,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00139,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00139,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00138,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00138,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00138,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00138,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00138,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00138,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00138,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00138,"percentile":0.02867}],"last30":[{"date":"2026-09-21T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00136,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00139,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00139,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00139,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00139,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00139,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00138,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00138,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00138,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00138,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00138,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00138,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00138,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00138,"percentile":0.02867}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-347","name":"Improper Verification of Cryptographic Signature","description":"The product does not verify, or incorrectly verifies, the cryptographic signature for data.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/347.html"}],"affected":[{"vendor":"chainguard","product":"hono","name":"hono","label":"hono","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/hono","purlType":"apk","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"chainguard","product":"hono-adapter-mqtt","name":"hono-adapter-mqtt","label":"hono-adapter-mqtt","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/hono-adapter-mqtt","purlType":"apk","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"chainguard","product":"hono-cli","name":"hono-cli","label":"hono-cli","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/hono-cli","purlType":"apk","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"chainguard","product":"hono-compat","name":"hono-compat","label":"hono-compat","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/hono-compat","purlType":"apk","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"chainguard","product":"hono-service-auth","name":"hono-service-auth","label":"hono-service-auth","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/hono-service-auth","purlType":"apk","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"chainguard","product":"hono-service-command-router","name":"hono-service-command-router","label":"hono-service-command-router","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/hono-service-command-router","purlType":"apk","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"chainguard","product":"hono-service-device-registry-jdbc","name":"hono-service-device-registry-jdbc","label":"hono-service-device-registry-jdbc","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/hono-service-device-registry-jdbc","purlType":"apk","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"chainguard","product":"langfuse-3-worker","name":"langfuse-3-worker","label":"langfuse-3-worker","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/langfuse-3-worker","purlType":"apk","versions":[{"text":"< 3.146.0-r1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.146.0-r1","eol":null,"hubHref":null},{"vendor":"chainguard","product":"langfuse-fips-3-worker","name":"langfuse-fips-3-worker","label":"langfuse-fips-3-worker","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/langfuse-fips-3-worker","purlType":"apk","versions":[{"text":"< 3.146.0-r1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.146.0-r1","eol":null,"hubHref":null},{"vendor":"wolfi","product":"langfuse-3-worker","name":"langfuse-3-worker","label":"langfuse-3-worker","ecosystem":"Wolfi","cpePart":null,"purl":"pkg:apk/wolfi/langfuse-3-worker","purlType":"apk","versions":[{"text":"< 3.146.0-r1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.146.0-r1","eol":null,"hubHref":null},{"vendor":"hono","product":"hono","name":"hono","label":"hono","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 4.11.4","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.11.4","eol":null,"hubHref":"/vendor/hono/hono"},{"vendor":"honojs","product":"hono","name":"hono","label":"hono","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 4.11.4","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.11.4","eol":null,"hubHref":"/vendor/honojs/hono"},{"vendor":"Npm","product":"hono","name":"hono","label":"hono","ecosystem":"Npm","cpePart":null,"purl":"pkg:npm/hono","purlType":"npm","versions":[{"text":"< 4.11.4","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.11.4","eol":null,"hubHref":null}],"affectedCount":13,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/honojs/hono/security/advisories/GHSA-3vhc-576x-3qv4","label":"github.com/honojs/hono/security/advisories/GHSA-3vhc-576x-3qv4","hostname":"github.com","tags":["X Refsource CONFIRM","Advisory","WEB","Third Party Advisory"]},{"url":"https://github.com/honojs/hono/commit/190f6e28e2ca85ce3d1f2f54db1310f5f3eab134","label":"github.com/honojs/hono/commit/190f6e28e2ca85ce3d1f2f54db1310f5f3eab134","hostname":"github.com","tags":["X Refsource MISC","FIX","WEB","Patch"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/22xxx/CVE-2026-22818.json","label":"github.com/CVEProject/cvelistV5/tree/main/cves/2026/22xxx/CVE-2026-22818.json","hostname":"github.com","tags":["Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-22818","label":"nvd.nist.gov/vuln/detail/CVE-2026-22818","hostname":"nvd.nist.gov","tags":["Advisory"]},{"url":"https://github.com/honojs/hono","label":"github.com/honojs/hono","hostname":"github.com","tags":["PACKAGE"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":["CGA-MVCJ-PC68-76CM"]},"timeline":[{"kind":"published","date":"2026-01-13T19:49:52.042Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-01-15T15:29:39.849Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":33,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T22:03:31.749Z","stale":false,"partial":false}}