EUVD-2026-66034
GHSA-prxh-339c-hvmr
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Network delivery via crafted PDF with mandatory user open (UI:R); no auth needed; impact scoped to renderer process (S:U), which fully compromises browser context including session data.
Primary rating from Vendor (Chrome).
CVSS VectorVendor: Chrome
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Lifecycle Timeline
3DescriptionCVE.org
Use after free in PDF in Google Chrome prior to 152.0.7977.65 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted PDF file. (Chromium security severity: Low)
AnalysisAI
Use-after-free in Google Chrome's PDF rendering subsystem (all versions prior to 152.0.7977.65) allows a remote attacker to execute arbitrary code confined within the Chrome sandbox by delivering a crafted PDF file. The vulnerability is triggered through normal user interaction - opening a malicious PDF - requiring no privileges or authentication. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that a user actively opens a crafted PDF file in Google Chrome's built-in PDF renderer - user interaction is mandatory (UI:R in CVSS vector). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 8.8 signals high severity based on network reachability, no authentication requirement, and full C/I/A impact on the vulnerable component. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker hosts or emails a specially crafted PDF designed to trigger the use-after-free condition in Chrome's PDF parser. A target user opens the PDF directly in Chrome (either via a web link or email attachment), causing the memory corruption that redirects execution to attacker-controlled code running within Chrome's renderer sandbox. … |
| Remediation | The primary fix is upgrading Google Chrome to version 152.0.7977.65 or later, as confirmed by the Chrome stable channel release advisory at https://chromereleases.googleblog.com/2026/08/stable-channel-update-for-desktop_0256176589.html. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify systems running Chrome versions prior to 152.0.7977.65 and assess your organization's PDF handling patterns; alert endpoint management teams and prepare a test environment for Chrome 152.0.7977.65 or later. …
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Same weakness CWE-416 – Use After Free
View allSame technique Use After Free
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External POC / Exploit Code
Leaving vuln.today