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Mallory
High

Use-after-free in PDFium in Google Chrome

IdentifiersCVE-2026-11307CWE-416· Use After Free

CVE-2026-11307 is a use-after-free vulnerability in PDFium in Google Chrome affecting versions prior to 149.0.7827.53. The flaw can be triggered by a crafted PDF file and may allow a remote attacker to achieve arbitrary code execution within the Chrome sandbox. Based on the provided content, the vulnerable component is PDFium, but no specific function or code path is identified.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation allows a remote attacker to execute arbitrary code inside the Chrome sandbox. The provided CVSS v3.1 vector (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) indicates potential high impact to confidentiality, integrity, and availability within the affected sandboxed context. The supplied description does not indicate a sandbox escape or direct host-level code execution.

Mitigation

If you can’t patch tonight, do this now.

No specific workaround or temporary mitigation is provided in the supplied content beyond updating to a fixed version. As an exposure-reduction measure, avoid opening untrusted PDF files in affected Chrome versions until the browser is updated.

Remediation

Patch, then assume compromise.

Upgrade Google Chrome to version 149.0.7827.53 or later. Debian guidance in the provided content also indicates fixed chromium package versions of 149.0.7827.53-1~deb12u1 for bookworm and 149.0.7827.53-1~deb13u1 for trixie.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType
GoogleChromeapplication

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What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.
Exposure mapping

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Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity4

Community discussion across Reddit, Mastodon, and other social sources.