5

CVE-2026-9358

Exploit

postcss-selector-parser AST Serialization container.js toString recursion

A vulnerability was determined in postcss-selector-parser up to 6.1.2/7.1.2. 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. Upgrading to version 6.1.3 and 7.1.3 is able to address this issue. This patch is called 5bc698cef66f8abd12610dc623e5d67cbc0f869d. It is suggested to upgrade the affected component. 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)." The commits were backported to 6.x branch, which was the most downloaded version.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
Herstellern/a
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Produkt postcss-selector-parser
Version 6.1.0
Status affected
Version 6.1.1
Status affected
Version 6.1.2
Status affected
Version 7.1.0
Status affected
Version 7.1.1
Status affected
Version 7.1.2
Status affected
Version 6.1.3
Status unaffected
Version 7.1.3
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.33% 0.241
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
cna@vuldb.com 2.1 0 0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
cna@vuldb.com 4.3 2.8 1.4
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
cna@vuldb.com 5 10 2.9
AV:N/AC:L/Au:N/C:N/I:N/A:P
CWE-404 Improper Resource Shutdown or Release

The product does not release or incorrectly releases a resource before it is made available for re-use.

CWE-674 Uncontrolled Recursion

The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.

https://vuldb.com/vuln/365321
https://vuldb.com/vuln/365321/cti
https://vuldb.com/submit/813080
https://gist.github.com/bx33661/581e3a38134601c04e19b4dfc9b459b9
https://github.com/postcss/postcss-selector-parser/commit/5bc698cef66f8abd12610dc623e5d67cbc0f869d
https://github.com/postcss/postcss-selector-parser/releases/tag/7.1.3
https://vuldb.com/cve/CVE-2026-9358