UnratedFix available

DEBIAN-CVE-2026-9358

Type: advisorySource: OSV1 source record

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.

Announced 24 May 2026Group revision 1

Original source ↗

DEBIAN-CVE-2026-9358

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:DEBIAN-CVE-2026-9358

node-css-loader

Source reference: /affected/0/package/name

Affected versions: 6.11.0+~cs15.5.7-1
Source reference: /affected/0/versions
6.11.0+~cs15.5.7-2
Source reference: /affected/0/versions
6.11.0+~cs15.5.7-3
Source reference: /affected/0/versions
6.7.2+~cs14.0.11-1
Source reference: /affected/0/versions
6.8.1+~cs14.0.17-1
Source reference: /affected/0/versions
6.8.1+~cs14.0.17-2
Source reference: /affected/0/versions
6.8.1+~cs14.1.4-1
Source reference: /affected/0/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

node-css-loader

Source reference: /affected/1/package/name

Affected versions: 6.11.0+~cs15.5.7-1
Source reference: /affected/1/versions
6.11.0+~cs15.5.7-2
Source reference: /affected/1/versions
6.11.0+~cs15.5.7-3
Source reference: /affected/1/versions
6.8.1+~cs14.0.17-1
Source reference: /affected/1/versions
6.8.1+~cs14.0.17-2
Source reference: /affected/1/versions
6.8.1+~cs14.1.4-1
Source reference: /affected/1/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

node-css-loader

Source reference: /affected/2/package/name

Affected versions: 6.8.1+~cs14.0.17-1
Source reference: /affected/2/versions
6.8.1+~cs14.0.17-2
Source reference: /affected/2/versions
Fixed versions: 6.8.1+~cs14.1.4-1
Source reference: /affected/2/ranges
Prerequisites: Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "node-css-loader",
      "purl": "pkg:deb/debian/node-css-loader?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "6.11.0+~cs15.5.7-1",
      "6.11.0+~cs15.5.7-2",
      "6.11.0+~cs15.5.7-3",
      "6.7.2+~cs14.0.11-1",
      "6.8.1+~cs14.0.17-1",
      "6.8.1+~cs14.0.17-2",
      "6.8.1+~cs14.1.4-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-9358.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "node-css-loader",
      "purl": "pkg:deb/debian/node-css-loader?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "6.11.0+~cs15.5.7-1",
      "6.11.0+~cs15.5.7-2",
      "6.11.0+~cs15.5.7-3",
      "6.8.1+~cs14.0.17-1",
      "6.8.1+~cs14.0.17-2",
      "6.8.1+~cs14.1.4-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-9358.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "6.8.1+~cs14.1.4-1"
          }
        ]
      }
    ],
    "package": {
      "name": "node-css-loader",
      "purl": "pkg:deb/debian/node-css-loader?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "6.8.1+~cs14.0.17-1",
      "6.8.1+~cs14.0.17-2"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-9358.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event: #58586 · Revision 1
Added to Heist Feed: Sun, 25 Oct 2026 18:13:27 GMT
Publisher date: Sun, 24 May 2026 06:16:37 GMT

Read the original announcement

Revision history

25 Oct 2026DEBIAN-CVE-2026-9358 · Revision 1Source updated