How severe is CVE-2018-18347?

CVE-2018-18347 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-2018-18347 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-18347?

CVE-2018-18347 primarily affects Google Chrome. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-18347?

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.

When was CVE-2018-18347 published?

CVE-2018-18347 was published on 2018-12-11 and last updated on 2026-06-17.

CVE-2018-18347

CVE-2018-18347 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-20.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.8
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Google Chrome
Published: 2018-12-11
Last modified: 2026-06-17

Description

Incorrect handling of failed navigations with invalid URLs in Navigation in Google Chrome prior to 71.0.3578.80 allowed a remote attacker to trick a user into executing javascript in an arbitrary origin via a crafted HTML page.

Frequently asked questions

What is CVE-2018-18347?: Incorrect handling of failed navigations with invalid URLs in Navigation in Google Chrome prior to 71.0.3578.80 allowed a remote attacker to trick a user into executing javascript in an arbitrary origin via a crafted HTML page.
How severe is CVE-2018-18347?: CVE-2018-18347 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-2018-18347 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-18347?: CVE-2018-18347 primarily affects Google Chrome. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-18347?: 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.
When was CVE-2018-18347 published?: CVE-2018-18347 was published on 2018-12-11 and last updated on 2026-06-17.

References

Affected products (5)

cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
cpe:2.3:o:redhat:linux_desktop:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:linux_server:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:linux_workstation:6.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

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