Uncontrolled Recursion in postcss-selector-parser - CVE-2026-9358
Published: September 19, 2026
Vulnerability identifier: #VU151445
CSH Severity: Low
CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-9358
CWE-ID: CWE-674
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled recursion in the toString function in src/selectors/container.js of the AST serialization component when serializing a manipulated AST. A remote attacker can execute a manipulation to cause a denial of service.
User interaction is required.
Affected software
postcss-selector-parser
Event Processing
InfoSphere Optim Archive Viewer
IBM Event Endpoint Management
Nautobot
Event Processing
InfoSphere Optim Archive Viewer
IBM Event Endpoint Management
Nautobot
How to mitigate CVE-2026-9358
Install security update from vendor's website.
postcss-selector-parser - addressed in versions 6.1.3, 7.1.3
Event Processing - update to 1.5.5
Nautobot - addressed in versions 2.4.42, 3.2.5
InfoSphere Optim Archive Viewer - update to 11.7.0.15
IBM Event Endpoint Management - update to 11.8.2
Event Processing - update to 1.5.5
Nautobot - addressed in versions 2.4.42, 3.2.5
InfoSphere Optim Archive Viewer - update to 11.7.0.15
IBM Event Endpoint Management - update to 11.8.2