ubuntu-cve-2026-9358
Vulnerability from osv_ubuntu
Published
2026-05-24 06:16
Modified
2026-06-24 08:58
Summary
Details
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.
Severity
4.3 (Medium)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-css-loader",
"binary_version": "1.0.1+repack-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "node-css-loader",
"purl": "pkg:deb/ubuntu/node-css-loader@1.0.1+repack-1?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.0.1-1",
"1.0.1+repack-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-css-loader",
"binary_version": "5.0.1+~cs14.0.5-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "node-css-loader",
"purl": "pkg:deb/ubuntu/node-css-loader@5.0.1+~cs14.0.5-1?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"5.0.1+~cs14.0.5-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-css-loader",
"binary_version": "6.8.1+~cs14.0.17-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "node-css-loader",
"purl": "pkg:deb/ubuntu/node-css-loader@6.8.1+~cs14.0.17-1?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"6.7.2+~cs14.0.11-1",
"6.8.1+~cs14.0.17-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-css-loader",
"binary_version": "6.8.1+~cs14.0.17-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "node-css-loader",
"purl": "pkg:deb/ubuntu/node-css-loader@6.8.1+~cs14.0.17-1?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"6.8.1+~cs14.0.17-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-css-loader",
"binary_version": "6.8.1+~cs14.0.17-2"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "node-css-loader",
"purl": "pkg:deb/ubuntu/node-css-loader@6.8.1+~cs14.0.17-2?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"6.8.1+~cs14.0.17-1",
"6.8.1+~cs14.0.17-2"
]
}
],
"aliases": [],
"details": "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.",
"id": "UBUNTU-CVE-2026-9358",
"modified": "2026-06-24T08:58:46Z",
"published": "2026-05-24T06:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-9358"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-9358"
},
{
"type": "REPORT",
"url": "https://gist.github.com/bx33661/581e3a38134601c04e19b4dfc9b459b9"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
},
{
"score": "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",
"type": "CVSS_V4"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-9358"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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