CVE-2026-41305

medium Red Hat
CVSS v3 Base Score
6.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS Score
0.0%
Exploitation probability in 30 days
Top 92% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Published: April 24, 2026 (20 days ago)
Last Modified: April 24, 2026
Vendor: Red Hat
Source: REDHAT

Description

A flaw was found in PostCSS. This vulnerability allows a remote attacker to perform Cross-Site Scripting (XSS) by submitting specially crafted CSS. When PostCSS processes and re-stringifies this CSS for embedding within HTML `<style>` tags, it fails to properly escape `</style>` sequences. This oversight enables the injected `</style>` to prematurely close the HTML style block, allowing the attacker to inject malicious scripts and execute arbitrary code in the user's browser context.

CWE

CWE-79

Affected Products

Cryostat 4Gatekeeper 3Migration Toolkit for ContainersMulticluster Engine for KubernetesNetwork Observability OperatorNode HealthCheck OperatorOpenShift LightspeedOpenShift PipelinesOpenShift Service Mesh 2OpenShift Service Mesh 3

References

🔗 bugzilla.redhat.com 🔗 www.cve.org 🔗 nvd.nist.gov 🔗 github.com 🔗 github.com