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Out-of-bounds read in Google Chrome Blink InterestGroups

IdentifiersCVE-2026-13033CWE-125

CVE-2026-13033 is a critical memory-safety vulnerability in Google Chrome affecting Blink's InterestGroups component in versions prior to 149.0.7827.197. The issue is described as an out-of-bounds read, and the provided context also states out-of-bounds read and write in Blink>InterestGroups. A remote attacker could trigger the flaw by convincing a target to load a crafted HTML page, potentially causing memory corruption and enabling arbitrary code execution in the browser process.

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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 may allow a remote attacker to execute arbitrary code on the targeted system. The broader impact can also include browser process compromise, denial of service via crash, and potential violation of Chrome security restrictions depending on exploit reliability and post-exploitation conditions.

Mitigation

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

Apply the Chrome security update on an expedited basis. Until patching is complete, reduce exposure by limiting use of untrusted websites and untrusted HTML content, enforcing browser isolation or sandboxing controls where available, and monitoring for abnormal browser crashes or exploitation attempts. However, no mitigation is a substitute for installing the vendor fix.

Remediation

Patch, then assume compromise.

Update Google Chrome to version 149.0.7827.197 or later on affected platforms. The provided advisory context indicates the Stable channel was updated to 149.0.7827.196/197 for Windows and Mac and 149.0.7827.196 for Linux; because the vulnerability is described as affecting Chrome prior to 149.0.7827.197, organizations should deploy the vendor-fixed release that includes the patch for CVE-2026-13033 as provided by Google for their platform.
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.

ACTIVITY FEED

Recent activity

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

4 SOURCESView more in app
What this page doesn’t show

The version that knows your environment.

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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 activity1

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

EXTERNAL REFERENCES
MITRE CVE
cve.org · CVE-2026-13033
NVD
nvd.nist.gov/vuln/detail/CVE-2026-13033
MITRE CWE · CWE-125
cwe.mitre.org