{"id":"CVE-2026-105811","revision":null,"records":[{"revision":"e3f32aba986747c89f5deb44d91094aa","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-105811","aliases":[],"title":"Authorization bypass through a user-controlled key in the Amazon Q Business Lambda hook sample in QnABot on AWS","description":"Authorization bypass through a user-controlled key in the optional Amazon Q Business Lambda hook sample ( q-business-lambda-hook https://github.com/aws-solutions-library-samples/qnabot-on-aws/blob/main/source/docs/lambda_hooks/README.md ), available with QnABot on AWS versions 7.0.0 through 7.4.5, might allow an authenticated remote user to read arbitrary Amazon S3 objects in the deploying AWS account. This sample solution provides an example Lambda hook and requires separate, manual deployment and additional setup. It is not deployed automatically with QnABot. Customers who have not deployed this optional sample hook are not affected and do not need to take action. \n\n\n\nTo remediate this issue, affected customers should update the QnABot on AWS stack to version 7.4.6 or later and then redeploy the Amazon Q Business Lambda hook sample stack. Updating the QnABot on AWS stack alone does not deliver the fix.","state":0,"publishedAt":"2026-10-06T20:03:31.155+00:00","modifiedAt":"2026-10-07T14:58:46.841+00:00","affected":[{"ecosystem":"Vendor product","name":"qnabot-on-aws","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"aws\",\n                    \"product\": \"qnabot-on-aws\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"7.0.0\",\n                            \"lessThan\": \"7.4.6\",\n                            \"versionType\": \"custom\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","score":7.1,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","score":6.5,"severity":"MEDIUM"}],"references":["https://github.com/aws-solutions-library-samples/qnabot-on-aws/releases/tag/v7.4.6","https://staging.prod.website.marketing.aws.dev/security/security-bulletins/2026-126-aws/"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-105811","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-105811","identifiers":["CVE-2026-105811"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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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-99bdca71b3604150bbac354a4a9d8a89","complete":false,"records":13758,"lastAttemptAt":"2026-11-11T12:09:48.959833+00:00","lastSuccessAt":"2026-11-11T12:09:48.955+00:00","error":null,"lastVerifiedAt":"2026-11-11T12:09:48.955+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13489,"expectedIdentifiers":13812,"failedIdentifiers":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-11T11:57:48.1935565+00:00","complete":true,"records":1097,"lastAttemptAt":"2026-11-11T11:57:48.1935565+00:00","lastSuccessAt":"2026-11-11T11:57:48.3433334+00:00","error":null,"lastVerifiedAt":"2026-11-11T11:57:48.3433335+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. 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