CVE-2026-15809

high

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.

References

https://github.com/cri-o/cri-o/pull/6524

https://github.com/cri-o/cri-o/pull/6450

https://bugzilla.redhat.com/show_bug.cgi?id=2500846

https://access.redhat.com/security/cve/CVE-2026-15809

Details

Source: Mitre, NVD

Published: 2026-07-15

Updated: 2026-07-16

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C

Severity: Medium

CVSS v3

Base Score: 7.8

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.00126