How severe is CVE-2026-9115?

CVE-2026-9115 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-9115 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-2026-9115?

CVE-2026-9115 affects Google Chrome. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-9115?

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

Does CVE-2026-9115 have an EU (EUVD) identifier?

Yes. CVE-2026-9115 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31161.

When was CVE-2026-9115 published?

CVE-2026-9115 was published on 2026-05-20 and last updated on 2026-06-17.

CVE-2026-9115

CVE-2026-9115 is a medium-severity vulnerability in Google Chrome with a CVSS 3.x base score of 4.3. 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: Medium (CVSS 3.x base score 4.3)
EPSS exploit prediction: 0% (13th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-31161
Weakness: CWE-693
Affected product: Google Chrome
Published: 2026-05-20
Last modified: 2026-06-17

Description

Insufficient policy enforcement in Service Worker in Google Chrome on prior to 148.0.7778.179 allowed a remote attacker to bypass same origin policy via a crafted HTML page. (Chromium security severity: High)

Frequently asked questions

What is CVE-2026-9115?: Insufficient policy enforcement in Service Worker in Google Chrome on prior to 148.0.7778.179 allowed a remote attacker to bypass same origin policy via a crafted HTML page. (Chromium security severity: High)
How severe is CVE-2026-9115?: CVE-2026-9115 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-9115 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-2026-9115?: CVE-2026-9115 affects Google Chrome. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-9115?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-9115 have an EU (EUVD) identifier?: Yes. CVE-2026-9115 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31161.
When was CVE-2026-9115 published?: CVE-2026-9115 was published on 2026-05-20 and last updated on 2026-06-17.

References

Affected products (1)

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

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