CVE-2026-4746 Heap Buffer Over-Write Vulenrabilty in timeplus-io/proton
An out-of-bounds write in the Proton database server allows attackers to execute arbitrary code or cause a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-4746?
CVE-2026-4746 is a critical memory corruption vulnerability in timeplus-io proton, published on 24 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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
Which versions are affected by CVE-2026-4746?
How do I fix CVE-2026-4746?
No fix has been published for CVE-2026-4746 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-4746 being exploited?
There is no known exploitation of CVE-2026-4746 in the wild and no public exploit code.
Sources
Also known as AZL-80837, AZL-80840, GHSA-ch4h-8w5c-3g8g.