Critical 10.0Published Mar 23, 2026

CVE-2026-4746Heap Buffer Over-Write Vulenrabilty in timeplus-io/proton

Updated under an hour ago (Oct 26, 2026, 7:40 AM ET)

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It affects timeplus-io proton. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for timeplus-io proton

Exploited in the last 30 days

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.

CVSS: 10.0 CRITICAL (v4.0, CNA)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
Weakness (CWE): CWE-787
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GovTech CSG
NVD analysis: Awaiting Analysis
Record last updated: Mar 24, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

timeplus-io proton timeplus_io:proton (from the name)	before 1.6.16	CNA record

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.