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High

Use-after-free in QUIC in Google Chrome

IdentifiersCVE-2026-9114CWE-416· Use After Free

CVE-2026-9114 is a high-severity use-after-free vulnerability in the QUIC component of Google Chrome affecting versions prior to 148.0.7778.179. The flaw arises from improper lifetime management of memory in QUIC, allowing freed memory to be subsequently accessed under attacker-influenced conditions. According to the provided content, a remote attacker can trigger the issue via malicious network traffic and achieve arbitrary code execution inside the Chrome sandbox. Chromium classified the issue as High severity and associated it with CWE-416.

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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 can result in arbitrary code execution within the Chrome sandbox in the context of the targeted browser process. 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 of data and execution within that sandboxed context. The content does not provide evidence of a sandbox escape or direct host compromise beyond code execution inside the sandbox.

Mitigation

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

Apply the vendor update on an expedited basis and verify deployed endpoints are no longer running versions prior to 148.0.7778.179. Until patching is complete, reduce exposure by limiting use of untrusted networks and untrusted content paths that could deliver malicious network traffic to Chrome. Because the content states exploitation requires user interaction, minimizing user exposure to attacker-controlled browsing activity may reduce risk, but patching is the primary mitigation.

Remediation

Patch, then assume compromise.

Update Google Chrome to version 148.0.7778.179 or later. The provided content indicates that Chrome versions prior to 148.0.7778.179 are affected and that Google released fixes in the 148.0.7778.178/179 stable update train, with 148.0.7778.179 specifically identified as the non-vulnerable threshold for this CVE. Ensure browser restarts are completed so the patched version is actually running.
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

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

8 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

Query your assets running an affected version, and investigate the blast radius.

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.

EXTERNAL REFERENCES
MITRE CVE
cve.org · CVE-2026-9114
NVD
nvd.nist.gov/vuln/detail/CVE-2026-9114
MITRE CWE · CWE-416
Use After Free
Vendor Advisory
chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0841193308.html
Permissions Required
issues.chromium.org/issues/495798630