CVE-2026-12537: CWE-20 Improper Input Validation in Google Cloud Gemini CLI
For the latest discoveries in cyber research for the week of 10th August, please download our Threat Intelligence Bulletin. TOP ATTACKS AND BREACHES North Carolina Ports, the US authority operating the ports of Wilmington, Morehead City and others, has suffered a cyberattack that forced some operations onto manual processes. The authority claims it has contained the intrusion, but degraded systems caused delays while affected services were restored. Ryde, an electric scooter operator in Scandinavian countries, has disclosed a data breach affecting all 4.5 million customer accounts across Norway, Sweden, Finland, and Germany. Attackers copied phone numbers, email addresses, birth dates, partial payment card numbers, and payment histories. Full card numbers and ride histories were unaffected. Canadian hardware wallet maker Coinkite has disclosed a theft campaign exploiting a Coldcard firmware vulnerability, with at least 1,367 bitcoin worth about $88.6 million stolen from thousands of addresses. The company halted affected shipments, destroyed vulnerable inventory, and released patched firmware after confirming exploitation against customer wallets. Beacon, a UK provider of customer relationship management software for charities, has disclosed a data breach after attackers compromised an access key. The company notified around 1,500 nonprofit customers that database information, donation records, and stored attachments may have been downloaded. Payment and bank details were not affected. AI THREATS Check Point Research has demonstrated that Cloudflare Code Mode, which allows AI agents to write TypeScript against tools, inherited five vulnerabilities from the workerd runtime. The flaws could enable sandbox escape and cross-tenant data exposure. Cloudflare rated two issues Critical and fixed its managed Workers environment. Researchers have disclosed vulnerabilities in Google Gemini CLI and Anthropic Claude Code that could expose automation environments to code execution and API key theft. CVE-2026-12537, rated CVSS 10.0, affected Gemini CLI workflows, while CVE-2026-54316 affected Claude Code. Both vendors released patched versions. Researchers have detailed AI-enabled identity fraud kits that automate know-your-customer bypasses across banks, fintech companies, and cryptocurrency exchanges. Tools such as ProKYC can generate identity documents, selfie-with-ID images, spoofed location data, and synthetic video used against document, selfie, and liveness checks during remote onboarding. VULNERABILITIES AND PATCHES Cisco has released fixes for multiple critical vulnerabilities in Catalyst SD-WAN and IOS XE software disclosed on August 5. The highest-severity issues carry CVSS scores up to 9.9 and can enable privilege escalation, code execution, or system compromise. Cisco also addressed additional high and medium-severity flaws across network management products. WordPress has released version 7.0.3 to address CVE-2026-64638, a high-severity Core vulnerability known as XSS2Shell. The flaw can turn a failed login into pre-authentication cross-site scripting and, under specific conditions, remote code execution. Fixes were also backported for supported WordPress branches dating to version 4.7. TP-Link has addressed 15 vulnerabilities in its Omada provisioning ecosystem affecting controllers, network devices, mobile applications, and VIGI cameras. The flaws include device impersonation, credential exposure, and remote code execution risks during provisioning. 11 flaws received CVE identifiers, and patched firmware has been released for affected products. A vendor-installed backdoor has been identified across at least 20 Zbtlink router models sold under brands including Wiflyer and ZBT. The remote-management component contacts hardcoded servers and can accept unauthenticated commands with root privileges. Researchers reproduced the behavior by impersonating the vendor server and obtaining a root shell. THREAT INTELLIGENCE REPORTS Resear…
AI Analysis
Technical Summary
CVE-2026-12537 is an improper input validation vulnerability in Google Cloud's Gemini CLI that affects workflow automation environments. The vulnerability has a CVSS 10.0 score, indicating critical severity, and can lead to remote code execution and compromise of API keys. The affected versions include Gemini CLI releases prior to 0.39.1. As a cloud service, Google Cloud manages remediation server-side and has released patched versions to address this issue. No active exploitation has been reported to date.
Potential Impact
This vulnerability allows attackers to execute arbitrary code remotely and potentially steal API keys within Gemini CLI automation workflows. This could lead to unauthorized access and control over cloud automation environments, posing a severe security risk.
Mitigation Recommendations
Google Cloud manages remediation for this cloud-hosted service and has released patched versions of Gemini CLI. Users should update to the latest patched versions as provided by Google Cloud. Patch status is confirmed as available. No additional mitigation steps are specified by the vendor.
CVE-2026-12537: CWE-20 Improper Input Validation in Google Cloud Gemini CLI
Description
For the latest discoveries in cyber research for the week of 10th August, please download our Threat Intelligence Bulletin. TOP ATTACKS AND BREACHES North Carolina Ports, the US authority operating the ports of Wilmington, Morehead City and others, has suffered a cyberattack that forced some operations onto manual processes. The authority claims it has contained the intrusion, but degraded systems caused delays while affected services were restored. Ryde, an electric scooter operator in Scandinavian countries, has disclosed a data breach affecting all 4.5 million customer accounts across Norway, Sweden, Finland, and Germany. Attackers copied phone numbers, email addresses, birth dates, partial payment card numbers, and payment histories. Full card numbers and ride histories were unaffected. Canadian hardware wallet maker Coinkite has disclosed a theft campaign exploiting a Coldcard firmware vulnerability, with at least 1,367 bitcoin worth about $88.6 million stolen from thousands of addresses. The company halted affected shipments, destroyed vulnerable inventory, and released patched firmware after confirming exploitation against customer wallets. Beacon, a UK provider of customer relationship management software for charities, has disclosed a data breach after attackers compromised an access key. The company notified around 1,500 nonprofit customers that database information, donation records, and stored attachments may have been downloaded. Payment and bank details were not affected. AI THREATS Check Point Research has demonstrated that Cloudflare Code Mode, which allows AI agents to write TypeScript against tools, inherited five vulnerabilities from the workerd runtime. The flaws could enable sandbox escape and cross-tenant data exposure. Cloudflare rated two issues Critical and fixed its managed Workers environment. Researchers have disclosed vulnerabilities in Google Gemini CLI and Anthropic Claude Code that could expose automation environments to code execution and API key theft. CVE-2026-12537, rated CVSS 10.0, affected Gemini CLI workflows, while CVE-2026-54316 affected Claude Code. Both vendors released patched versions. Researchers have detailed AI-enabled identity fraud kits that automate know-your-customer bypasses across banks, fintech companies, and cryptocurrency exchanges. Tools such as ProKYC can generate identity documents, selfie-with-ID images, spoofed location data, and synthetic video used against document, selfie, and liveness checks during remote onboarding. VULNERABILITIES AND PATCHES Cisco has released fixes for multiple critical vulnerabilities in Catalyst SD-WAN and IOS XE software disclosed on August 5. The highest-severity issues carry CVSS scores up to 9.9 and can enable privilege escalation, code execution, or system compromise. Cisco also addressed additional high and medium-severity flaws across network management products. WordPress has released version 7.0.3 to address CVE-2026-64638, a high-severity Core vulnerability known as XSS2Shell. The flaw can turn a failed login into pre-authentication cross-site scripting and, under specific conditions, remote code execution. Fixes were also backported for supported WordPress branches dating to version 4.7. TP-Link has addressed 15 vulnerabilities in its Omada provisioning ecosystem affecting controllers, network devices, mobile applications, and VIGI cameras. The flaws include device impersonation, credential exposure, and remote code execution risks during provisioning. 11 flaws received CVE identifiers, and patched firmware has been released for affected products. A vendor-installed backdoor has been identified across at least 20 Zbtlink router models sold under brands including Wiflyer and ZBT. The remote-management component contacts hardcoded servers and can accept unauthenticated commands with root privileges. Researchers reproduced the behavior by impersonating the vendor server and obtaining a root shell. THREAT INTELLIGENCE REPORTS Resear…
CVSS v4.0
Score 10.0critical
Affected software
Google Cloud
Gemini CLI
Google Cloud
run-gemini-cli GitHub Action
pkg:github/google-github-actions/run-gemini-clipkg:github/google-cloud/gemini-cliRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-12537 is an improper input validation vulnerability in Google Cloud's Gemini CLI that affects workflow automation environments. The vulnerability has a CVSS 10.0 score, indicating critical severity, and can lead to remote code execution and compromise of API keys. The affected versions include Gemini CLI releases prior to 0.39.1. As a cloud service, Google Cloud manages remediation server-side and has released patched versions to address this issue. No active exploitation has been reported to date.
Potential Impact
This vulnerability allows attackers to execute arbitrary code remotely and potentially steal API keys within Gemini CLI automation workflows. This could lead to unauthorized access and control over cloud automation environments, posing a severe security risk.
Mitigation Recommendations
Google Cloud manages remediation for this cloud-hosted service and has released patched versions of Gemini CLI. Users should update to the latest patched versions as provided by Google Cloud. Patch status is confirmed as available. No additional mitigation steps are specified by the vendor.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GoogleCloud
- Date Reserved
- 2026-06-17T15:08:00.562Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Is Cloud Service
- true
Threat ID: 6a3be194eed863c81eeb9649
Added to database: 06/24/2026, 13:54:28 UTC
Last enriched: 08/17/2026, 22:18:49 UTC
Last updated: 09/22/2026, 13:47:42 UTC
Views: 292
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