How severe is CVE-2019-5839?

CVE-2019-5839 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-2019-5839 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-5839?

CVE-2019-5839 primarily affects Google Chrome. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-5839?

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

When was CVE-2019-5839 published?

CVE-2019-5839 was published on 2019-06-27 and last updated on 2026-06-17.

CVE-2019-5839

CVE-2019-5839 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-20.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.3
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Google Chrome
Published: 2019-06-27
Last modified: 2026-06-17

Description

Excessive data validation in URL parser in Google Chrome prior to 75.0.3770.80 allowed a remote attacker who convinced a user to input a URL to bypass website URL validation via a crafted URL.

Frequently asked questions

What is CVE-2019-5839?: Excessive data validation in URL parser in Google Chrome prior to 75.0.3770.80 allowed a remote attacker who convinced a user to input a URL to bypass website URL validation via a crafted URL.
How severe is CVE-2019-5839?: CVE-2019-5839 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-2019-5839 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-5839?: CVE-2019-5839 primarily affects Google Chrome. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-5839?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-5839 published?: CVE-2019-5839 was published on 2019-06-27 and last updated on 2026-06-17.

References

Affected products (8)

cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:backports:sle-15:-:*:*:*:*:*:*
cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:leap:42.3:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*

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