{"id":"GHSA-xh87-mx6m-69f3","revision":null,"records":[{"revision":"09d10efcd0554644b3ce71d2940c8c98","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-27700","aliases":[],"title":"Hono is Vulnerable to Authentication Bypass by IP Spoofing in AWS Lambda ALB conninfo","description":"Hono is a Web application framework that provides support for any JavaScript runtime. In versions 4.12.0 and 4.12.1, when using the AWS Lambda adapter (`hono/aws-lambda`) behind an Application Load Balancer (ALB), the `getConnInfo()` function incorrectly selected the first value from the `X-Forwarded-For` header. Because AWS ALB appends the real client IP address to the end of the `X-Forwarded-For` header, the first value can be attacker-controlled. This could allow IP-based access control mechanisms (such as the `ipRestriction` middleware) to be bypassed. Version 4.12.2 patches the issue.","state":0,"publishedAt":"2026-02-25T15:01:44.681+00:00","modifiedAt":"2026-02-27T17:01:28.403+00:00","affected":[{"ecosystem":"Vendor product","name":"hono","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"honojs\",\n                    \"product\": \"hono\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 4.12.0, < 4.12.2\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N","score":8.2,"severity":"HIGH"}],"references":["https://github.com/honojs/hono/security/advisories/GHSA-xh87-mx6m-69f3","https://github.com/honojs/hono/commit/41adbf56e252c04611f8972364ac0887ae07a4c7","https://github.com/honojs/hono/releases/tag/v4.12.2"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-27700","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-27700","identifiers":["CVE-2026-27700"]},"retained":false,"historicalAffected":[]},{"revision":"1ffb0645a6cb4ffbb14c33b6603bf3ce","observedAt":"2026-11-13T10:57:18.531+00:00","statement":{"source":"euvd","id":"EUVD-2026-8644","aliases":["CVE-2026-27700","GHSA-xh87-mx6m-69f3"],"title":"Hono is a Web application framework that provides support for any JavaScript runtime. In versions 4.12.0 and 4.12.1, when using the AWS Lambda adapter (`hono/aws-lambda`) behind an Application Load Balancer (ALB), the `getConnInfo()` functi…","description":"Hono is a Web application framework that provides support for any JavaScript runtime. In versions 4.12.0 and 4.12.1, when using the AWS Lambda adapter (`hono/aws-lambda`) behind an Application Load Balancer (ALB), the `getConnInfo()` function incorrectly selected the first value from the `X-Forwarded-For` header. Because AWS ALB appends the real client IP address to the end of the `X-Forwarded-For` header, the first value can be attacker-controlled. This could allow IP-based access control mechanisms (such as the `ipRestriction` middleware) to be bypassed. Version 4.12.2 patches the issue.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N","score":8.2,"severity":null}],"references":["https://github.com/honojs/hono/security/advisories/GHSA-xh87-mx6m-69f3","https://github.com/honojs/hono/commit/41adbf56e252c04611f8972364ac0887ae07a4c7","https://github.com/honojs/hono/releases/tag/v4.12.2"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-8644","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Feb 25, 2026, 3:01:44 PM","dateUpdated":"Feb 27, 2026, 5:01:28 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-8644","identifiers":["EUVD-2026-8644","CVE-2026-27700","GHSA-xh87-mx6m-69f3"]},"retained":false,"historicalAffected":[]},{"revision":"b4548ea921cf4a848dfd808c9a1ee803","observedAt":"2026-10-25T06:17:33.365+00:00","statement":{"source":"nvd","id":"CVE-2026-27700","aliases":[],"title":"Hono is a Web application framework that provides support for any JavaScript runtime. In versions 4.12.0 and 4.12.1, when using the AWS Lambda adapter (`hono/aws-lambda`) behind an Application Load Balancer (ALB), the `getConnInfo()` functi…","description":"Hono is a Web application framework that provides support for any JavaScript runtime. In versions 4.12.0 and 4.12.1, when using the AWS Lambda adapter (`hono/aws-lambda`) behind an Application Load Balancer (ALB), the `getConnInfo()` function incorrectly selected the first value from the `X-Forwarded-For` header. Because AWS ALB appends the real client IP address to the end of the `X-Forwarded-For` header, the first value can be attacker-controlled. This could allow IP-based access control mechanisms (such as the `ipRestriction` middleware) to be bypassed. Version 4.12.2 patches the issue.","state":0,"publishedAt":"2026-02-25T16:23:26.44+00:00","modifiedAt":"2026-06-17T10:27:32.397+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N","score":8.2,"severity":"HIGH"},{"system":"CVSS 3.1 · nvd@nist.gov · Primary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5,"severity":"HIGH"}],"references":["https://github.com/honojs/hono/commit/41adbf56e252c04611f8972364ac0887ae07a4c7","https://github.com/honojs/hono/releases/tag/v4.12.2","https://github.com/honojs/hono/security/advisories/GHSA-xh87-mx6m-69f3"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-27700","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-290","CWE-345"],"productCriteria":["cpe:2.3:a:hono:hono:*:*:*:*:*:node.js:*:*"],"sourceDates":{"published":"2026-02-25T16:23:26.440","lastModified":"2026-06-17T10:27:32.397"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-27700","identifiers":["CVE-2026-27700"]},"retained":false,"historicalAffected":[]},{"revision":"3023c40121104e9380d4095ca5df58fc","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-xh87-mx6m-69f3","aliases":["CVE-2026-27700"],"title":"Hono is Vulnerable to Authentication Bypass by IP Spoofing in AWS Lambda ALB conninfo","description":"## Summary\n\nWhen using the AWS Lambda adapter (`hono/aws-lambda`) behind an Application Load Balancer (ALB), the `getConnInfo()` function incorrectly selected the first value from the `X-Forwarded-For` header.\n\nBecause AWS ALB appends the real client IP address to the end of the `X-Forwarded-For` header, the first value can be attacker-controlled.\n\nThis could allow IP-based access control mechanisms (such as the `ipRestriction` middleware) to be bypassed.\n\n## Details\n\nIn ALB environments, AWS appends the actual client IP address to the end of any existing `X-Forwarded-For` header value. However, the previous implementation of `getConnInfo()` extracted the leftmost IP address:\n\n```ts\naddress = xff.split(',')[0].trim()\n```\n\nIf a client sent:\n\n```\nX-Forwarded-For: <spoofed-ip>\n```\n\nALB would forward:\n\n```\nX-Forwarded-For: <spoofed-ip>, <real-client-ip>\n```\n\nSince the implementation selected the first value, the spoofed IP address was trusted. This affected applications using:\n\n```ts\nipRestriction(getConnInfo, { allowList: [...] })\n```\n\nor any custom middleware relying on `getConnInfo(c).remote.address` for authorization decisions.\n\nThe issue only affects deployments using the AWS Lambda adapter behind an ALB. API Gateway (v1/v2) and Lambda Function URLs are not affected, as they use AWS-provided source IP values from `requestContext`.\n\n## Impact\n\nAn unauthenticated remote attacker could bypass IP-based access restrictions by supplying a crafted `X-Forwarded-For` header. This may allow access to resources that were intended to be restricted by IP address.\n\nOnly applications deployed behind an ALB and relying on `getConnInfo()` for IP-based authorization are affected.","state":0,"publishedAt":"2026-02-25T18:02:19+00:00","modifiedAt":"2026-09-10T03:50:36.1213745+00:00","affected":[{"ecosystem":"npm","name":"hono","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"4.12.0"},{"kind":"fixed","version":"4.12.2"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/honojs/hono/security/advisories/GHSA-xh87-mx6m-69f3","https://nvd.nist.gov/vuln/detail/CVE-2026-27700","https://github.com/honojs/hono/commit/41adbf56e252c04611f8972364ac0887ae07a4c7","https://github.com/honojs/hono","https://github.com/honojs/hono/releases/tag/v4.12.2"],"sourceUrl":"https://github.com/advisories/GHSA-xh87-mx6m-69f3","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-xh87-mx6m-69f3","identifiers":["GHSA-xh87-mx6m-69f3","CVE-2026-27700"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-15T10:02:17.3763497+00:00","complete":true,"records":1781,"lastAttemptAt":"2026-11-15T10:02:17.3763497+00:00","lastSuccessAt":"2026-11-15T10:02:17.6058686+00:00","error":null,"lastVerifiedAt":"2026-11-15T10:02:17.6058701+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-7de4d7559a5263003f03d9f70577ab06f92ba4178309f26fce53e22a4a959294-3113592d787b958ba87cf6300a2f439f8836169d49c36cdd65ca959c60a1acfe","complete":true,"records":425784,"lastAttemptAt":"2026-11-15T10:02:16.903149+00:00","lastSuccessAt":"2026-11-15T10:02:16.8893294+00:00","error":null,"lastVerifiedAt":"2026-11-15T10:02:16.903149+00:00","snapshotPublishedAt":"2026-11-15T09:28:12+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-ab7e83ec40d841f68d6d65c6dcc2aa85","complete":false,"records":13821,"lastAttemptAt":"2026-11-15T10:12:45.3805188+00:00","lastSuccessAt":"2026-11-15T10:12:45.374+00:00","error":"158 identifier lookups failed; latest failures include AccessDenied (HTTP 403). Other identifiers were checked independently.","lastVerifiedAt":"2026-11-15T10:12:45.374+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13573,"expectedIdentifiers":13874,"failedIdentifiers":158},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-15T10:02:17.3763497+00:00","complete":true,"records":1125,"lastAttemptAt":"2026-11-15T10:02:17.3763497+00:00","lastSuccessAt":"2026-11-15T10:02:17.760821+00:00","error":null,"lastVerifiedAt":"2026-11-15T10:02:17.7608224+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-d33b5144615b488f88b7a7390696bc39","complete":true,"records":13833,"lastAttemptAt":"2026-11-15T10:02:36.0431422+00:00","lastSuccessAt":"2026-11-15T10:02:36.038+00:00","error":null,"lastVerifiedAt":"2026-11-15T10:02:36.038+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13874,"expectedIdentifiers":13874,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-64eea06dbd27de8464d5dbce1b78cc794cc59e2d901516ae0d3ea76e624cdae0","complete":true,"records":9955,"lastAttemptAt":"2026-11-15T10:02:17.2383659+00:00","lastSuccessAt":"2026-11-14T13:57:23.1208135+00:00","error":null,"lastVerifiedAt":"2026-11-15T10:02:17.2383659+00:00","snapshotPublishedAt":"2026-11-14T13:17:57+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-f4424d7d4861b1af1404bd15abcb83f295dcd003412a9340ca99dc8200aa148a","complete":true,"records":2014,"lastAttemptAt":"2026-11-15T10:02:16.9649371+00:00","lastSuccessAt":"2026-11-13T19:57:08.2864435+00:00","error":null,"lastVerifiedAt":"2026-11-15T10:02:16.9649371+00:00","snapshotPublishedAt":"2026-11-13T19:33:10+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-012aff9b2fb349d53e2c4bace6ca57956b6f5f9d82c1dc9fdc1c9b3c738f8977","complete":true,"records":3148,"lastAttemptAt":"2026-11-15T10:02:17.2553329+00:00","lastSuccessAt":"2026-11-14T04:57:03.8279646+00:00","error":null,"lastVerifiedAt":"2026-11-15T10:02:17.2553329+00:00","snapshotPublishedAt":"2026-11-14T03:02:50+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-878f718ccd076f540460423958c8e379b139b997b45858275573ecc4d702fe9a","complete":true,"records":232474,"lastAttemptAt":"2026-11-15T10:02:17.1321415+00:00","lastSuccessAt":"2026-11-15T05:33:06.8241102+00:00","error":null,"lastVerifiedAt":"2026-11-15T10:02:17.1321415+00:00","snapshotPublishedAt":"2026-11-15T04:33:08+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}