CVE-2026-89058
Full vulnerability record from the local CVENow database.
Description
A flaw was found in RESTEasy's CorsFilter, which, when configured to allow all origins ("*"), reflects the request's Origin header back in the Access-Control-Allow-Origin response together with Access-Control-Allow-Credentials: true. This permissive cross-origin policy allows a malicious website to make credentialed cross-origin requests and read authenticated responses from a victim's session, resulting in a loss of confidentiality.
Severity
HIGH
CVSS score
7.4
(v3.1)
Vulnerability status
Awaiting Analysis
Source identifier
Published
2026-09-18 08:17:01.653000
Last modified
2026-10-29 22:17:11.550000
View original CVE JSON
{
"id": "CVE-2026-89058",
"sourceIdentifier": "[email protected]",
"published": "2026-09-18T08:17:01.653",
"lastModified": "2026-10-29T22:17:11.550",
"vulnStatus": "Awaiting Analysis",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A flaw was found in RESTEasy's CorsFilter, which, when configured to allow all origins (\"*\"), reflects the request's Origin header back in the Access-Control-Allow-Origin response together with Access-Control-Allow-Credentials: true. This permissive cross-origin policy allows a malicious website to make credentialed cross-origin requests and read authenticated responses from a victim's session, resulting in a loss of confidentiality."
}
],
"affected": [
{
"source": "[email protected]",
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],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N",
"baseScore": 7.4,
"baseSeverity": "HIGH",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "REQUIRED",
"scope": "CHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"availabilityImpact": "NONE"
},
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}
],
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{
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"ssvcData": {
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"id": "CVE-2026-89058",
"options": [
{
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{
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{
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],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-346"
}
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],
"references": [
{
"url": "https://access.redhat.com/errata/RHSA-2026:83082",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:83520",
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{
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"source": "[email protected]"
},
{
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"source": "[email protected]"
},
{
"url": "https://github.com/resteasy/resteasy/commit/efeb2b7",
"source": "[email protected]"
},
{
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}