How severe is CVE-2026-7963?

CVE-2026-7963 has a CVSS 3.x base score of 8.3, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-7963 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-7963?

CVE-2026-7963 affects Google Chrome. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-7963?

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-2026-7963 have an EU (EUVD) identifier?

Yes. CVE-2026-7963 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28029.

When was CVE-2026-7963 published?

CVE-2026-7963 was published on 2026-05-06 and last updated on 2026-06-17.

CVE-2026-7963

CVE-2026-7963 is a high-severity vulnerability in Google Chrome with a CVSS 3.x base score of 8.3. 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-693.

Key facts

Severity: High (CVSS 3.x base score 8.3)
EPSS exploit prediction: 0% (13th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-28029
Weakness: CWE-693
Affected product: Google Chrome
Published: 2026-05-06
Last modified: 2026-06-17

Description

Inappropriate implementation in ServiceWorker in Google Chrome prior to 148.0.7778.96 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Medium)

Frequently asked questions

What is CVE-2026-7963?: Inappropriate implementation in ServiceWorker in Google Chrome prior to 148.0.7778.96 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Medium)
How severe is CVE-2026-7963?: CVE-2026-7963 has a CVSS 3.x base score of 8.3, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-7963 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-7963?: CVE-2026-7963 affects Google Chrome. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-7963?: 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-2026-7963 have an EU (EUVD) identifier?: Yes. CVE-2026-7963 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28029.
When was CVE-2026-7963 published?: CVE-2026-7963 was published on 2026-05-06 and last updated on 2026-06-17.

References

Affected products (1)

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

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