CVE-2026-105811
MediumCVSS 6.5Exploitation Probability (EPSS)
Low risk24th percentile - higher than 24% of all known CVEs
Summary
In the optional Amazon Q Business Lambda hook sample (q-business-lambda-hook) available with QnABot on AWS versions 7.0.0 through 7.4.5, an authorization bypass through a user-controlled key might allow an authenticated remote user to read arbitrary S3 objects. Fixed in version 7.4.6, but requires redeployment of the hook stack.
Risk Assessment
Risk of unauthorized reading of S3 data, potentially leading to confidentiality breaches of data stored in AWS.
Recommendation
Upgrade the QnABot on AWS stack to version 7.4.6 or later and redeploy the Amazon Q Business Lambda hook sample stack.
Related vulnerabilities
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Out-of-bounds write vulnerability in Hitachi JP1 products. It affects JP1/Integrated Management 3 - Manager, JP1/Automatic Job Management System 3 (Manager, Agent, Agent Minimal Edition), and JP1/Base in specific versions. The flaw can cause memory corruption due to writing beyond buffer boundaries.
- CVE-2026-86576Critical
Heap-based buffer overflow vulnerability in Hitachi JP1 products. It affects JP1/Integrated Management 3 - Manager, JP1/Automatic Job Management System 3 (Manager, Agent, Agent Minimal Edition), and JP1/Base in specified version ranges. The flaw can corrupt heap memory.
- CVE-2026-86575Critical
Stack-based buffer overflow vulnerability in Hitachi JP1 products. It affects JP1/Integrated Management 3 - Manager, JP1/Automatic Job Management System 3 (Manager, Agent, Agent Minimal Edition), and JP1/Base in specific versions. The flaw can corrupt stack memory and potentially lead to code execution.
- CVE-2026-86574Critical
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- CVE-2026-82122Critical
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- CVE-2026-82120Critical
Heap-based buffer overflow vulnerability in Hitachi HiRDB. It affects HiRDB Server Version 10 (from 10-00 before 10-12-01) and HiRDB Server Version 9 and additional-function variants in specified version ranges. The flaw can corrupt heap memory.
- CVE-2026-82119Critical
OS command injection vulnerability in Hitachi HiRDB. It affects HiRDB Server Version 10 (from 10-00 before 10-12-01) and HiRDB Server Version 9 and additional-function variants in specified version ranges. The flaw may allow execution of arbitrary commands on the system.
- CVE-2026-82118Critical
Stack-based buffer overflow vulnerability in Hitachi HiRDB. It affects HiRDB Server Version 10 (from 10-00 before 10-12-01) and HiRDB Server Version 9 and additional-function variants in specified version ranges. The flaw can corrupt stack memory.
- CVE-2026-82117Critical
Authentication bypass by spoofing vulnerability in Hitachi HiRDB. It affects HiRDB Server Version 10 (from 10-00 before 10-12-01) and HiRDB Server Version 9 and additional-function variants in specified version ranges. The flaw may allow unauthorized access.
- CVE-2026-82116Critical
Missing authentication for critical function vulnerability in Hitachi HiRDB. It affects HiRDB Server Version 10 (from 10-00 before 10-12-01) and HiRDB Server Version 9 and additional-function variants in specified version ranges. The flaw may allow access to critical functions without authentication.
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS