CVE-2026-4746

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CVSS 4.0

10.0 critical

EPSS

<1%p20

Published

Mar 24, 2026 (Mar 24, 2026)

Modified

Jun 17, 2026

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.

Weakness: CWE-787
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:N/AU:Y/R:U/V:C/RE:L/U:Amber

NVD CVE.org GitHub PoCs EPSS (0.3%)

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