CVE-2026-15809
The fix for a previous vulnerability (CVE-2022-4318) was incorrect, allowing it to be bypassed.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.18%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.18% probability · 8th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-134, CWE-116
- Source
- secalert@redhat.com
EPSS 0.2% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://access.redhat.com/errata/RHSA-2026:57361
- https://access.redhat.com/errata/RHSA-2026:60444
- https://access.redhat.com/errata/RHSA-2026:60449
- https://access.redhat.com/errata/RHSA-2026:60452
- https://access.redhat.com/errata/RHSA-2026:62548
- https://access.redhat.com/errata/RHSA-2026:65838
- https://access.redhat.com/errata/RHSA-2026:65906
- https://access.redhat.com/errata/RHSA-2026:66385
- https://access.redhat.com/errata/RHSA-2026:67836
- https://access.redhat.com/errata/RHSA-2026:67856
- https://access.redhat.com/errata/RHSA-2026:70585
- https://access.redhat.com/security/cve/CVE-2026-15809
- https://bugzilla.redhat.com/show_bug.cgi?id=2500846
- https://github.com/cri-o/cri-o/pull/6450
- https://github.com/cri-o/cri-o/pull/6524
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.