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vuln-cve/data/2026/53xxx/CVE-2026-53727.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-53727",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-06-10T16:43:31.242Z",
"datePublished": "2026-07-17T20:30:37.291Z",
"dateUpdated": "2026-07-20T13:48:30.250Z"
},
"containers": {
"cna": {
"title": "css_parser: SSRF and Local File Disclosure in `CssParser::Parser#read_remote_file`",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-918",
"lang": "en",
"description": "CWE-918: Server-Side Request Forgery (SSRF)",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "NONE",
"vulnAvailabilityImpact": "NONE",
"subConfidentialityImpact": "HIGH",
"subIntegrityImpact": "NONE",
"subAvailabilityImpact": "NONE",
"baseScore": 8.9,
"baseSeverity": "HIGH",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N",
"version": "4.0"
}
}
],
"references": [
{
"name": "https://github.com/premailer/css_parser/security/advisories/GHSA-9pmc-p236-855h",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/premailer/css_parser/security/advisories/GHSA-9pmc-p236-855h"
},
{
"name": "https://github.com/premailer/css_parser/commit/7d2ddf0189cd54b54f378f59daefa10cb036e476",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/premailer/css_parser/commit/7d2ddf0189cd54b54f378f59daefa10cb036e476"
},
{
"name": "https://github.com/premailer/css_parser/commit/e0a151458b2a801ae265ba420862ef8b1127b3ae",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/premailer/css_parser/commit/e0a151458b2a801ae265ba420862ef8b1127b3ae"
},
{
"name": "https://github.com/premailer/css_parser/releases/tag/v3.0.0",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/premailer/css_parser/releases/tag/v3.0.0"
}
],
"affected": [
{
"vendor": "premailer",
"product": "css_parser",
"versions": [
{
"version": "< 3.0.0",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-07-17T20:30:37.291Z"
},
"descriptions": [
{
"lang": "en",
"value": "css_parser is a Ruby CSS parser. From 2.2.0 until 3.0.0, CssParser::Parser#read_remote_file in lib/css_parser/parser.rb, and therefore load_uri! and the @import-following branch of add_block!, issued HTTP and HTTPS requests against any host, port, and URI without a scheme allowlist, host or IP filtering, or protection against link-local, loopback, or RFC-1918 addresses. Location: redirects were followed recursively back into the same function, which also serviced file:// URIs, so a single attacker-controlled HTTP redirect could upgrade the bug from SSRF to arbitrary local file disclosure. Any consumer of css_parser that hands it attacker-influenced CSS together with a base_uri: option is exposed. This issue is fixed in version 3.0.0."
}
],
"source": {
"advisory": "GHSA-9pmc-p236-855h",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"references": [
{
"url": "https://github.com/premailer/css_parser/security/advisories/GHSA-9pmc-p236-855h",
"tags": [
"exploit"
]
}
],
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-07-20T13:48:25.291408Z",
"id": "CVE-2026-53727",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-07-20T13:48:30.250Z"
}
}
]
}
}