Threat Intelligence / CVE / CVE-2026-12440

CVE-2026-12440 — Google Chrome

CVSS v3.1 9.6 (CRITICAL) · EPSS 0.3% (higher than 22.9% of all scored CVEs) · Priority 5.7/10 · Published 2026-06-17

As of 2026-06-18, CVE-2026-12440 is a CRITICAL-severity vulnerability in Google Chrome, CVSS v3.1 9.6, EPSS 0.3% (22.9th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-12440, most recently “Google Chrome 149 Multiple Memory-Corruption Vulnerabilities Enable Arbitrary Code Execution (CVE-2026-12437 through CVE-2026-12469)”.

Last updated: 2026-06-18

What is CVE-2026-12440?

Use after free in DigitalCredentials in Google Chrome on Windows prior to 149.0.7827.155 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical)

The record classifies CVE-2026-12440 under weakness class CWE-416. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs a user to take an action first, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 87 days ago.

Severity and exploitation probability

CVSS v3.1 base score
9.6 — CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
EPSS (FIRST)
0.3% probability of exploitation in the next 30 days, higher than 22.9% of all scored CVEs
CISA KEV
Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority
5.7/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published
2026-06-17, last modified 2026-06-18

Is CVE-2026-12440 being exploited?

No public exploitation evidence for CVE-2026-12440 is recorded in the sources Threadlinqs tracks — CISA KEV, Exploit-DB, public proof-of-concept repositories and ProjectDiscovery Nuclei — as of 2026-06-18. That is an absence of evidence in those feeds, not a guarantee that the vulnerability is unexploited.

Affected products and versions

How to fix CVE-2026-12440

No vendor patch reference has been recorded for CVE-2026-12440 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

Threat activity tracking CVE-2026-12440

1 tracked threat in the Threadlinqs corpus references CVE-2026-12440, either in the campaign’s CVE list or as an indicator on the campaign record.

Sources

Enriched from CVE.org, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on .

Other references

Full detection coverage & IOCs for threats exploiting CVE-2026-12440 are available via the Threadlinqs MCP server (Purple tier). View plans →

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