{
"id": "GHSA-4hfh-6x8g-gwpp",
"aliases": [
"CVE-2026-41839"
],
"details": "A WebFlux application with a compromised subdomain (for example, compromised via cross-site scripting (XSS)) is vulnerable to an escalation attack exchanging a known session ID for that of an authenticated user.\n\nAffected versions:\nSpring Framework 7.0.0 through 7.0.7; 6.2.0 through 6.2.18; 6.1.0 through 6.1.27; 5.3.0 through 5.3.48.",
"summary": "Spring Framework Escalation via Session Fixation in WebFlux",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "7.0.0"
},
{
"fixed": "7.0.8"
}
]
}
],
"package": {
"name": "org.springframework:spring-webflux",
"ecosystem": "Maven"
},
"database_specific": {
"last_known_affected_version_range": "<= 7.0.7"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.2.0"
},
{
"fixed": "6.2.19"
}
]
}
],
"package": {
"name": "org.springframework:spring-webflux",
"ecosystem": "Maven"
},
"database_specific": {
"last_known_affected_version_range": "<= 6.2.18"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.1.0"
},
{
"last_affected": "6.1.21"
}
]
}
],
"package": {
"name": "org.springframework:spring-webflux",
"ecosystem": "Maven"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.3.39"
}
]
}
],
"package": {
"name": "org.springframework:spring-webflux",
"ecosystem": "Maven"
}
}
],
"modified": "2026-07-30T15:16:57Z",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N"
}
],
"published": "2026-06-09T06:31:57Z",
"references": [
{
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-41839",
"type": "ADVISORY"
},
{
"url": "https://github.com/spring-projects/spring-framework/issues/36742",
"type": "WEB"
},
{
"url": "https://github.com/spring-projects/spring-framework/issues/36743",
"type": "WEB"
},
{
"url": "https://github.com/spring-projects/spring-framework/commit/b8ddd2c690fe3f00bb5e3d9f913a37504aab49a0",
"type": "WEB"
},
{
"url": "https://github.com/spring-projects/spring-framework/commit/d72da90d3a562632e2b565113813f7b4a31f8717",
"type": "WEB"
},
{
"url": "https://github.com/spring-projects/spring-framework",
"type": "PACKAGE"
},
{
"url": "https://github.com/spring-projects/spring-framework/releases/tag/v6.2.19",
"type": "WEB"
},
{
"url": "https://github.com/spring-projects/spring-framework/releases/tag/v7.0.8",
"type": "WEB"
},
{
"url": "https://spring.io/security/cve-2026-41839",
"type": "WEB"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-384"
],
"severity": "MODERATE",
"github_reviewed": true,
"nvd_published_at": "2026-06-09T05:16:35Z",
"github_reviewed_at": "2026-07-30T15:16:57Z"
}
}