How severe is CVE-2026-1861?

CVE-2026-1861 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-1861 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-1861?

CVE-2026-1861 affects Google Chrome. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-1861?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-1861 have an EU (EUVD) identifier?

Yes. CVE-2026-1861 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5160.

When was CVE-2026-1861 published?

CVE-2026-1861 was published on 2026-02-03 and last updated on 2026-06-17.

CVE-2026-1861

CVE-2026-1861 is a high-severity vulnerability in Google Chrome with a CVSS 3.x base score of 8.8. 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-787.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 0% (33rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-5160
Weakness: CWE-787
Affected product: Google Chrome
Published: 2026-02-03
Last modified: 2026-06-17

Description

Heap buffer overflow in libvpx in Google Chrome prior to 144.0.7559.132 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)

Frequently asked questions

What is CVE-2026-1861?: Heap buffer overflow in libvpx in Google Chrome prior to 144.0.7559.132 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)
How severe is CVE-2026-1861?: CVE-2026-1861 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-1861 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-1861?: CVE-2026-1861 affects Google Chrome. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-1861?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-1861 have an EU (EUVD) identifier?: Yes. CVE-2026-1861 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5160.
When was CVE-2026-1861 published?: CVE-2026-1861 was published on 2026-02-03 and last updated on 2026-06-17.

References

Affected products (1)

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

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