CVE-2026-18157

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.24% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 15.3% of scored records. A rank, not a probability.

NVD base score

7.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Awaiting Analysis. NVD last modified this record on 2026-08-03.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-07-31 02:38Z1 MO AGO

Last updated

2026-07-31 15:58Z1 MO AGO

Reserved

2026-07-28

Assigning CNA

redhat

Record state

PUBLISHED

Severity

High (CVSS 7.8)

CNA CVSS vector

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

Weaknesses

• CWE-88Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')Base

Data version

5.2

Document digest

8b05d25583dbc4e8880e69a3d881090f3fb0871eb827f59de906d9d9634aab2c

• access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-18157vdb-entryx_refsource_REDHAT
• bugzilla.redhat.comRHBZ#2465250https://bugzilla.redhat.com/show_bug.cgi?id=2465250issue-trackingx_refsource_REDHAT
• github.comhttps://github.com/RedHatInsights/yggdrasil-worker-package-manager/commit/959745bb5917c17f0316af199aace6c71baa5ad7
• github.comhttps://github.com/RedHatInsights/yggdrasil-worker-package-manager/releases/tag/0.1.4
• github.comhttps://github.com/RedHatInsights/yggdrasil-worker-package-manager/releases/tag/0.2.4