How severe is CVE-2023-3740?

CVE-2023-3740 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-2023-3740 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-3740?

CVE-2023-3740 affects Google Chrome. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-3740?

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

When was CVE-2023-3740 published?

CVE-2023-3740 was published on 2023-08-01 and last updated on 2026-06-17.

CVE-2023-3740

CVE-2023-3740 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.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
EPSS exploit prediction: 1% (42nd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Google Chrome
Published: 2023-08-01
Last modified: 2026-06-17

Description

Insufficient validation of untrusted input in Themes in Google Chrome prior to 115.0.5790.98 allowed a remote attacker to potentially serve malicious content to a user via a crafted background URL. (Chromium security severity: Low)

Frequently asked questions

What is CVE-2023-3740?: Insufficient validation of untrusted input in Themes in Google Chrome prior to 115.0.5790.98 allowed a remote attacker to potentially serve malicious content to a user via a crafted background URL. (Chromium security severity: Low)
How severe is CVE-2023-3740?: CVE-2023-3740 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-2023-3740 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-3740?: CVE-2023-3740 affects Google Chrome. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-3740?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-3740 published?: CVE-2023-3740 was published on 2023-08-01 and last updated on 2026-06-17.

References

Affected products (1)

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

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