CVE-2026-0290 in Prisma Browser
Summary
by MITRE • 08/13/2026
An information disclosure vulnerability in the Account Protection feature of Palo Alto Networks Prisma® Browser enables a local attacker to view sensitive data.
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Analysis
by VulDB Data Team • 08/13/2026
This vulnerability represents a critical information disclosure flaw within the Account Protection functionality of Palo Alto Networks Prisma Browser, creating significant security risks for organizations relying on this browser solution. The issue stems from inadequate access controls and data protection mechanisms that allow local attackers with compromised system access to extract sensitive information that should remain protected within the browser's account protection framework. Such vulnerabilities typically arise from insufficient input validation, improper privilege separation, or weak cryptographic implementations that fail to adequately safeguard user credentials, session tokens, or other confidential data elements stored or processed by the browser's security features.
The technical nature of this vulnerability aligns with common CWE classifications related to information exposure and inadequate protection of sensitive data. Attackers exploiting this weakness can potentially access authentication tokens, user session information, or other account-related metadata that would normally be restricted to authorized users only. This type of vulnerability falls under the broader category of privilege escalation attacks where local adversaries leverage system weaknesses to gain unauthorized access to protected resources. The operational impact extends beyond simple data exposure as compromised credentials and session information can enable attackers to maintain persistent access to user accounts, potentially leading to full system compromise or lateral movement within network environments.
The implications of this vulnerability are particularly severe in enterprise environments where Prisma Browser may be deployed across multiple endpoints and user workstations. Organizations using this browser solution face increased risk of credential theft, unauthorized account access, and potential data breaches that could affect thousands of users depending on the scale of deployment. Security professionals should consider this vulnerability as part of broader ATT&CK framework categories related to credential access and privilege escalation techniques. The attack surface expands when considering that local attackers often have elevated system privileges or can leverage other initial compromise vectors to reach this information disclosure point. This weakness demonstrates insufficient defense-in-depth measures within the browser's security architecture, highlighting gaps in both application-level protections and operating system access controls.
Mitigation strategies should include immediate deployment of vendor-provided patches and updates while implementing additional monitoring for unauthorized access attempts to sensitive browser components. Organizations must conduct comprehensive vulnerability assessments to identify other potential information disclosure points within their browser environments and ensure proper network segmentation to limit lateral movement capabilities of compromised systems. Security teams should also establish enhanced logging and alerting mechanisms specifically targeting suspicious access patterns to account protection features, while maintaining regular security audits of browser configurations to prevent similar vulnerabilities from emerging in future deployments.