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Back to active CVEs
High · CVSS 7.1CVE-2026-105811

Authorization bypass through a user-controlled key in the Amazon Q Business Lambda hook sample in QnABot on AWSCVE-2026-105811

Answer in brief

CVE-2026-105811 records a High severity (CVSS 7.1) vulnerability in Authorization bypass through a user-controlled key in the Amazon Q Business Lambda hook sample in QnABot on AWS. The current sources do not mark it as known exploited. The current feed maps aws/qnabot-on-aws (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 6, 2026Updated Oct 6, 2026Source checked Oct 7, 2026First seen by HOL Oct 6, 2026Material review Oct 6, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.1
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 7.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps aws/qnabot-on-aws (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
aws/qnabot-on-awsgeneric>=7.0.0 <7.4.67.4.6

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for aws/qnabot-on-aws.
  2. 2Review the reported fix. Update aws/qnabot-on-aws to 7.4.6 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 6, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 6, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 6, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • Source referencestaging.prod.website.marketing.aws.dev
Upstream source 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. To 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Gitea issue attachment API allows changing comment attachmentsAlso CWE-639
  • Langflow OSS is affected by multiple vulnerabilitiesAlso CWE-639
  • Gitea OAuth2 refresh token grant accepts access tokensSame generic ecosystem
  • Langflow OSS is affected by multiple vulnerabilitiesSame generic ecosystem
  • Langflow OSS is affected by multiple vulnerabilitiesSame generic ecosystem
  • Langflow OSS is affected by multiple vulnerabilitiesSame generic ecosystem

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-639
Source
CVE List V5
Source checked
Oct 7, 2026
References
2 linked sources
Open source record