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High

Sandbox escape use-after-free in ANGLE in Google Chrome

IdentifiersCVE-2026-9877CWE-416· Use After Free

CVE-2026-9877 is a use-after-free vulnerability in ANGLE in Google Chrome prior to version 148.0.7778.216. The flaw affects Chrome’s graphics/rendering stack and can be triggered via a crafted HTML page. According to the provided content, exploitation requires that the attacker has already compromised the renderer process; from that position, the use-after-free condition in ANGLE can be leveraged to cross the browser security boundary and escape the sandbox. Google rated the issue as Critical.

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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 could allow an attacker who already achieved code execution or control within the renderer process to escape Chrome’s sandbox. This can enable execution outside the renderer’s confinement, potentially leading to broader code execution, privilege escalation in the browser context, and follow-on compromise of the host environment subject to the privileges of the browser process and platform protections.

Mitigation

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

No specific workaround is provided in the supplied content. The practical mitigation is to apply the vendor update as soon as available and restart the browser so the patched build is loaded. Standard hardening measures such as reducing exposure to untrusted web content may lower risk but are not a substitute for patching.

Remediation

Patch, then assume compromise.

Upgrade Google Chrome to version 148.0.7778.216 or later. For Debian chromium, upgrade to 148.0.7778.215-1~deb12u1 on oldstable (bookworm) or 148.0.7778.215-1~deb13u1 on stable (trixie), as applicable.
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

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

2 SOURCESView more in app
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.
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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 activity

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

EXTERNAL REFERENCES
MITRE CVE
cve.org · CVE-2026-9877
NVD
nvd.nist.gov/vuln/detail/CVE-2026-9877
MITRE CWE · CWE-416
Use After Free
Vendor Advisory
chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html
Permissions Required
issues.chromium.org/issues/496445460