How severe is CVE-2026-2378?

CVE-2026-2378 has a CVSS 3.x base score of 7.4, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2026-2378 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-2378?

CVE-2026-2378 affects Thebrowser Arc Search. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-2378?

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.

Does CVE-2026-2378 have an EU (EUVD) identifier?

Yes. CVE-2026-2378 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-13808.

When was CVE-2026-2378 published?

CVE-2026-2378 was published on 2026-03-20 and last updated on 2026-06-17.

CVE-2026-2378

CVE-2026-2378 is a high-severity vulnerability in Thebrowser Arc Search with a CVSS 3.x base score of 7.4. 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-1021.

Key facts

Severity: High (CVSS 3.x base score 7.4)
EPSS exploit prediction: 0% (7th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-13808
Weakness: CWE-1021
Affected product: Thebrowser Arc Search
Published: 2026-03-20
Last modified: 2026-06-17

Description

ArcSearch for Android versions prior to 1.12.7 could display a different domain in the address bar than the content being shown, enabling address bar spoofing after user interaction via crafted web content.

Frequently asked questions

What is CVE-2026-2378?: ArcSearch for Android versions prior to 1.12.7 could display a different domain in the address bar than the content being shown, enabling address bar spoofing after user interaction via crafted web content.
How severe is CVE-2026-2378?: CVE-2026-2378 has a CVSS 3.x base score of 7.4, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2026-2378 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-2378?: CVE-2026-2378 affects Thebrowser Arc Search. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-2378?: 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.
Does CVE-2026-2378 have an EU (EUVD) identifier?: Yes. CVE-2026-2378 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-13808.
When was CVE-2026-2378 published?: CVE-2026-2378 was published on 2026-03-20 and last updated on 2026-06-17.

References

https://arc.net/security/bulletins

Affected products (1)

cpe:2.3:a:thebrowser:arc_search:*:*:*:*:*:android:*:*

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