GHSA-4HFH-6X8G-GWPP

Vulnerability from github – Published: 2026-06-09 06:31 – Updated: 2026-07-30 15:16
VLAI
Summary
Spring Framework Escalation via Session Fixation in WebFlux
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.

Affected versions: Spring 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.

Severity
4.2 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 7.0.7"
      },
      "package": {
        "ecosystem": "Maven",
        "name": "org.springframework:spring-webflux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "7.0.0"
            },
            {
              "fixed": "7.0.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 6.2.18"
      },
      "package": {
        "ecosystem": "Maven",
        "name": "org.springframework:spring-webflux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.2.19"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.springframework:spring-webflux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.1.0"
            },
            {
              "last_affected": "6.1.21"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.springframework:spring-webflux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "5.3.39"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-41839"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-384"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-30T15:16:57Z",
    "nvd_published_at": "2026-06-09T05:16:35Z",
    "severity": "MODERATE"
  },
  "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.",
  "id": "GHSA-4hfh-6x8g-gwpp",
  "modified": "2026-07-30T15:16:57Z",
  "published": "2026-06-09T06:31:57Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-41839"
    },
    {
      "type": "WEB",
      "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": "PACKAGE",
      "url": "https://github.com/spring-projects/spring-framework"
    },
    {
      "type": "WEB",
      "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"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Spring Framework Escalation via Session Fixation in WebFlux"
}



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