Is CVE-2026-4746 in the CISA KEV catalog?

No. CVE-2026-4746 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the EPSS score for CVE-2026-4746?

CVE-2026-4746 has an EPSS score of 0.28% (19th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2026-4746

UNSCORED

NVD

Description

Out-of-bounds Write vulnerability in timeplus-io proton (base/poco/Foundation/src‎ modules). This vulnerability is associated with program files inflate.C. This issue affects proton: before 1.6.16.

CWE-787Out-of-bounds Write

CVSS v3.1 Vector

No CVSS vector data available.

Exploit Intelligence

0.28%probability of exploitation in 30 days

19thpercentile

Low risk: more likely to be exploited than 19% of all known CVEs.

References

https://github.com/timeplus-io/proton/pull/943

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-03-24.