Is CVE-2026-15809 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-15809?

CVE-2026-15809 has a CVSS v3 severity of HIGH (7.8).

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CVE-2026-15809

Description

A flaw was found in CRI-O. The fix for a previous vulnerability (CVE-2022-4318) was incorrect, allowing it to be bypassed. An attacker capable of setting environment variables on a container can inject a newline character into the HOME environment variable. This issue allows the addition of arbitrary lines into /etc/passwd by use of a specially crafted environment variable.