VulnerabilityAwaiting Analysis

CVE-2026-4746

Out-of-bounds Write vulnerability in timeplus-io proton (base/poco/Foundation/src‎ modules).

CRITICAL 10.0EPSS 0.28%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.28%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

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.

CVSS 4.0: 10.0 CRITICALCVSS: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/M
EPSS: 0.28% probability · 20th percentile
CISA KEV: Not listed
Weakness: CWE-787
Source: cve_disclosure@tech.gov.sg

References

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

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.