Published : Oct. 23, 2026, 10:16 p.m. | 1 hour, 58 minutes ago
Description :Craft CMS allows any authenticated control panel user to submit an element-search condition whose element selector is evaluated as a sandboxed Twig object template. Craft’s allowed column filter delegates property lookup to Yii ArrayHelper, outside Twig’s SecurityPolicy. Repeated single-segment lookups therefore bypass the sandbox’s empty property/method allowlists.
The vulnerable condition value is ultimately cast to an integer. That does not protect the secret: the template can return author ID 1 when a guessed key character is correct and an impossible ID otherwise. The JSON endpoint returns entries for the first case and an empty array for the second, forming a stable remote character oracle.
After recovering GeneralConfig::securityKey, the same user can compute Craft’s generic HMAC wire format offline. Signed parameters such as redirect are then accepted and passed to unsandboxed View::renderObjectTemplate(), where Twig’s string-callable form can invoke native PHP callables. The regression proof uses the harmless substr() callback and observes abcdef becoming cdef; it does not execute an OS command.
Severity: 8.8 | HIGH
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Google Gemini (gemini-2.5-flash) • CVE: CVE-2026-115938
N/A
Based on the nature of CVE identifiers, CVE-2026-115938 indicates a vulnerability that is either anticipated or has not yet been publicly detailed. As specific exploit details are unavailable, this guide provides comprehensive remediation strategies for a critical, unpatched vulnerability, assuming a high-impact scenario such as a remote code execution (RCE) flaw in a network-accessible service.
1. IMMEDIATE ACTIONS
Upon discovery or credible threat intelligence regarding CVE-2026-115938, rapid containment and assessment are paramount.
1. Isolate Affected Systems: Immediately disconnect or segment any systems running the potentially vulnerable software from the broader network, especially from internet-facing interfaces. This may involve moving systems to an isolated VLAN, applying strict firewall rules, or physically disconnecting network cables.
2. Block External Access: Implement temporary firewall rules at the network perimeter (e.g., ingress/egress filtering) to deny all external inbound connections to the vulnerable service's port(s) and protocol(s). Allow only essential internal traffic on a least-privilege basis.
3. Conduct Initial Forensic Triage: Before making significant changes, collect volatile data from potentially compromised systems. This includes active network connections, running processes, memory dumps, and system logs. This data is critical for understanding potential exploitation and preserving evidence.
4. Notify Stakeholders: Inform relevant internal teams (e.g., incident response, IT operations, legal, management) about the potential vulnerability and ongoing actions. Prepare for external communication if data breach or public disclosure becomes necessary.
5. Inventory and Prioritize: Identify all instances of the vulnerable software across the environment. Prioritize remediation efforts based on asset criticality, network exposure, and data sensitivity.
2. PATCH AND UPDATE INFORMATION
Since specific patch information for CVE-2026-115938 is not available, the following steps outline the general approach to securing systems against newly disclosed vulnerabilities.
1. Monitor Vendor Advisories: Continuously monitor official vendor security advisories, mailing lists, and security bulletins for the affected product. The vendor is the authoritative source for official patches, workarounds, and detailed vulnerability information.
2. Apply Patches Immediately: Once an official patch or security update is released by the vendor, test it in a controlled environment (e.g., staging, development) if feasible, and then deploy it to production systems as quickly as possible. Prioritize critical systems and internet-facing assets.
3. If No Patch Available: In situations where a patch is not immediately available, the vendor may provide official workarounds or mitigation scripts. Implement these temporary measures rigorously. If no official guidance is provided, consider disabling or uninstalling the vulnerable component or service until a patch is released, provided this does not disrupt critical business operations beyond acceptable levels.
4. Rollback Plan: Ensure a comprehensive rollback plan is in place before applying any patches or updates, allowing for a quick recovery in case of unforeseen issues.
3. MITIGATION STRATEGIES
These strategies reduce the attack surface and potential impact of the vulnerability, even if a direct patch is not yet applied.
1. Network Segmentation: Implement or reinforce network segmentation to isolate systems running the vulnerable service. This limits lateral movement for attackers and confines potential breaches to smaller segments of the network.
2. Firewall and Access Control Lists (ACLs): Configure host-based and network-based firewalls to restrict inbound and outbound traffic to the vulnerable service to only necessary source IP addresses and ports. Employ the principle of least privilege.
3. Principle of Least Privilege: Ensure the service running the vulnerable component operates with the absolute minimum necessary user and system privileges. Avoid running services as root or administrator.
4. Input Validation and Sanitization: If the vulnerability is related to improper input handling (e.g., buffer overflow, injection), implement robust input validation and sanitization at all application layers (e.g., web application firewalls, server-side code) to filter malicious input.
5. Disable Unnecessary Features: Review the vulnerable service for any non-essential features, modules, or protocols that can be disabled without impacting business functionality. Reducing complexity reduces the attack surface.
6. Application Hardening: Apply general hardening best practices to the operating system and application environment hosting the vulnerable service. This includes disabling unnecessary services, removing default credentials, and configuring secure logging.
4. DETECTION METHODS
Proactive detection is crucial for identifying exploitation attempts or successful compromises.
1. Log Analysis and Monitoring: Implement centralized log collection and analysis for