CVE-2026-4746 PUBLISHED

Heap Buffer Over-Write Vulenrabilty in timeplus-io/proton

Assigner: GovTech CSG
Reserved: 24.03.2026 Published: 24.03.2026 Updated: 24.03.2026

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.

Metrics

CVSS 4.0

CVSS 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/S:N/AU:Y/R:U/V:C/RE:L/U:Amber
CVSS Score: 10

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	High
Attack Complexity	Low	Integrity	High	Integrity	High
Attack Requirements	None	Availability	High	Availability	High
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	timeplus-io
Product	proton
Versions	Default: affected affected from 0 to 1.6.16 (excl.)

Credits

TITAN Team (titancaproject@gmail.com) reporter

References

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

Problem Types

CWE-787 Out-of-bounds Write CWE