CVE-2026-9358
postcss AST Serialization container.js toString recursion
CVSS Score
4.3
EPSS Score
0.0%
EPSS Percentile
10th
A vulnerability was determined in postcss up to 7.1.1. Affected is the function toString of the file src/selectors/container.js of the component AST Serialization. Executing a manipulation can lead to uncontrolled recursion. It is possible to launch the attack remotely. The exploit has been publicly disclosed and may be utilized. The vendor explains, that according to his definition "DoS on server-side on user-generated CSS is low risk for us (since most users compile own CSS with PostCSS)."
| CWE | CWE-674 CWE-404 |
| Vendor | n/a |
| Product | postcss |
| Published | May 24, 2026 |
| Last Updated | May 29, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:X/RC:C Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
n/a / postcss
7.1.0 7.1.1
References
Credits
🔍 bx33661 (VulDB User) VulDB CNA Team