How severe is CVE-2026-5911?

CVE-2026-5911 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 none, integrity low, and availability none.

Is CVE-2026-5911 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-5911?

CVE-2026-5911 affects Google Chrome. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-5911?

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

Does CVE-2026-5911 have an EU (EUVD) identifier?

Yes. CVE-2026-5911 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20742.

When was CVE-2026-5911 published?

CVE-2026-5911 was published on 2026-04-08 and last updated on 2026-06-17.

CVE-2026-5911

CVE-2026-5911 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% (6th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-20742
Weakness: CWE-693
Affected product: Google Chrome
Published: 2026-04-08
Last modified: 2026-06-17

Description

Policy bypass in ServiceWorkers in Google Chrome prior to 147.0.7727.55 allowed a remote attacker to bypass content security policy via a crafted HTML page. (Chromium security severity: Low)

Frequently asked questions

What is CVE-2026-5911?: Policy bypass in ServiceWorkers in Google Chrome prior to 147.0.7727.55 allowed a remote attacker to bypass content security policy via a crafted HTML page. (Chromium security severity: Low)
How severe is CVE-2026-5911?: CVE-2026-5911 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 none, integrity low, and availability none.
Is CVE-2026-5911 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-5911?: CVE-2026-5911 affects Google Chrome. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-5911?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-5911 have an EU (EUVD) identifier?: Yes. CVE-2026-5911 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20742.
When was CVE-2026-5911 published?: CVE-2026-5911 was published on 2026-04-08 and last updated on 2026-06-17.

References

Affected products (1)

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

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