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From: Salvatore Bonaccorso <carnil@debian.org>
To: Debian Bug Tracking System <submit@bugs.debian.org>
Subject: node-css-loader: CVE-2026-9358
Message-ID: <178077129724.1053627.2238303316320369052.reportbug@eldamar.lan>
X-Mailer: reportbug 13.2.0
Date: Sat, 06 Jun 2026 20:41:37 +0200
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Source: node-css-loader
Version: 6.8.1+~cs14.0.17-2
Severity: important
Tags: security upstream
X-Debbugs-Cc: carnil@debian.org, Debian Security Team <team@security.debian.org>

Hi,

The following vulnerability was published for node-css-loader.

CVE-2026-9358[0]:
| 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)."


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2026-9358
    https://www.cve.org/CVERecord?id=CVE-2026-9358
[1] https://gist.github.com/bx33661/581e3a38134601c04e19b4dfc9b459b9

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore
]