How severe is CVE-2026-12459?

CVE-2026-12459 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-12459 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-12459?

CVE-2026-12459 affects Google Chrome. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-12459?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-12459 have an EU (EUVD) identifier?

Yes. CVE-2026-12459 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37544.

When was CVE-2026-12459 published?

CVE-2026-12459 was published on 2026-06-17.

CVE-2026-12459

CVE-2026-12459 is a medium-severity vulnerability in Google Chrome with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-37544
Weakness: CWE-79
Affected product: Google Chrome
Published: 2026-06-17
Last modified: 2026-06-17

Description

Inappropriate implementation in Serial in Google Chrome prior to 149.0.7827.155 allowed a remote attacker to inject arbitrary scripts or HTML (UXSS) via a crafted HTML page. (Chromium security severity: High)

Frequently asked questions

What is CVE-2026-12459?: Inappropriate implementation in Serial in Google Chrome prior to 149.0.7827.155 allowed a remote attacker to inject arbitrary scripts or HTML (UXSS) via a crafted HTML page. (Chromium security severity: High)
How severe is CVE-2026-12459?: CVE-2026-12459 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-12459 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-12459?: CVE-2026-12459 affects Google Chrome. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-12459?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-12459 have an EU (EUVD) identifier?: Yes. CVE-2026-12459 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37544.
When was CVE-2026-12459 published?: CVE-2026-12459 was published on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*

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