CVE-2026-15809

HIGH
MEDIUM Priority: 0.01 BB Relevance: 41/100
Published: 2026-07-15 Modified: 2026-11-02 First seen: 2026-11-02 Status: active

Attack Surface

Low Complexity No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Local
AC: Low
PR: Low
UI: None
S: Unchanged
C: High
I: High
A: 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 & Advisories (15)

https://access.redhat.com/errata/RHSA-2026:57361
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:60444
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:60449
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:60452
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:62548
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:65838
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:65906
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:66385
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:67836
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:67856
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:70585
vendor-advisory x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2500846
issue-tracking x_refsource_REDHAT

Bug Bounty Relevance

41 / 100
✓ Low complexity
✓ No user interaction

CVSS Score

7.8 / 10.0 v3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploitation Probability

0.18%
Raw Score 0.001830
Percentile 8.0%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00183
2026-11-12
0.00183
2026-11-10
0.00183
2026-11-09
0.00183
2026-11-08
0.00183
2026-11-07
0.00183
2026-11-06
0.00183
2026-11-05
0.00183
2026-11-04
0.00183
2026-11-03
0.00183
2026-11-02
0.00183

Intelligence Sources

mitre ref →
nvd ref →