PT-2026-27326 · Timeplus Io · Proton

Titan Team · Published 2026-03-24 · Updated 2026-03-24 · CVE-2026-4746

Mitre

CVSS v4.0

10

Critical

AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/S:N/AU:Y/R:U/V:C/RE:L/U:Amber

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.

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2026-4746

Affected Products

Proton

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-4746 · Security Note
• https://github.com/timeplus-io/proton/pull/943 · Patch