CVE-2026-10993: Chrome Skia Heap Buffer Overflow Allows Memory Information Disclosure

Technical summary

CVE-2026-10993 is a heap buffer overflow in Skia (CWE-122) that allows out-of-bounds memory read access. The vulnerability is triggered when Chrome processes a malicious HTML page, causing the graphics engine to read beyond allocated heap memory boundaries. This permits information disclosure from process memory. The attack requires no authentication or special privileges and succeeds with basic user interaction (visiting a link). No code execution or availability impact is present—the threat is confined to confidentiality via memory disclosure.

Business impact

Information disclosure through memory leaks could expose sensitive application data, user credentials cached in memory, or other process internals depending on what occupies the affected heap region. For enterprise environments where Chrome is a primary browser for accessing cloud applications or internal web services, this creates a targeted attack surface. Attackers could harvest authentication tokens, API keys, or personal information from affected users by hosting malicious sites or injecting content into legitimate ones.

Affected systems

Google Chrome versions prior to 149.0.7827.53 are vulnerable. The attack vector is network-based with user interaction required. Chromium-based browsers that incorporate the vulnerable Skia version may also be affected, though the advisory explicitly references Chrome. Organizations should inventory Chrome deployments, especially in high-risk user populations (executives, developers, financial staff) whose memory might contain valuable secrets.

Exploitability

The vulnerability is moderately exploitable. No elevated privileges are required, network access is sufficient, and user interaction is limited to visiting a webpage—a plausible social engineering or drive-by attack scenario. However, successful exploitation requires precise heap layout manipulation to leak meaningful data, and the attacker cannot control what is read, only that out-of-bounds access occurs. This makes weaponization feasible but not trivial; expect proof-of-concept demonstrations but not mass exploitation in the short term.

Remediation

Update Google Chrome to version 149.0.7827.53 or later. Chrome's automatic update mechanism will deploy the patch; verify completion by checking Settings > About Chrome. For managed environments, IT teams can enforce deployment through Group Policy (Windows) or configuration management platforms. Test patch rollout in a pilot group before full deployment to confirm compatibility with enterprise applications.

Patch guidance

Google Chrome automatically checks for and downloads updates daily. Users can manually trigger the update by navigating to Settings > About Chrome; the browser will update and request a restart. Enterprise administrators can verify deployment by confirming the browser version string via remote reporting or local inventory tools. Verify the patched version is 149.0.7827.53 or higher. No special configuration is required post-patch; the vulnerability is closed by the rendering engine fix.

Detection guidance

Network-level detection is difficult because the attack payload is embedded in HTML served over normal HTTPS. Endpoint detection should focus on: (1) monitoring Chrome process memory access patterns for unusual read sequences near heap boundaries, though this requires specialized tools; (2) tracking user visits to suspicious or newly registered domains that might host exploits; (3) confirming all Chrome instances are updated to 149.0.7827.53 or later via vulnerability scanning or EDR reporting. Host-based IDS/IPS may not flag this attack without application-level context.

Why prioritize this

This vulnerability warrants prompt but not emergency patching. The CVSS 6.5 (Medium) score reflects the confined impact (information disclosure only, no code execution) and the requirement for user interaction. However, prioritize patching for users in sensitive roles (finance, HR, engineering, executive) who may have valuable data in process memory. Organizations with strong browser isolation or sandboxing may deprioritize slightly. The absence of KEV (Known Exploited Vulnerabilities) listing indicates no known active exploitation at the time of publication, but this should not delay updates indefinitely.

Risk score, explained

CVSS 6.5 is assigned because: (1) Attack Vector: Network—the vulnerability is remotely exploitable; (2) Attack Complexity: Low—no special conditions beyond a crafted HTML page are needed; (3) Privileges Required: None; (4) User Interaction: Required—the user must visit a malicious page; (5) Scope: Unchanged—no impact outside the Chrome process; (6) Confidentiality: High—process memory may be disclosed; (7) Integrity: None—no data modification; (8) Availability: None—no denial of service. The Medium severity reflects that confidentiality impact is significant but exploitation is non-trivial and impact is scoped.

Frequently asked questions