Spring Framework maxInMemorySize Bypassed in Jaxb2Decoder

{
  "id": "d6c9c8da85eaa2a52f2963f2faf71ee31199937d98b0f1f1a434d2e5a9d7cf68",
  "url": "https://osv.dev/vulnerability/CVE-2026-47891",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Spring Framework maxInMemorySize Bypassed in Jaxb2Decoder",
    "summary": "A Spring WebFlux application that relies on the Aalto XML processor to parse XML input does not correctly enforce the maxInMemorySize limit. Spring Framework 7.0.0 - 7.0.8 Spring Framework 6.2.0 - 6.2.19 Spring Framework 6.1.0 - 6.1.28 Spring Framework 6.0.0 - 6.0.30 Spring Framework 5.3.0 - 5.3.49 Spring Framework 5.2.25.RELEASE and earlier",
    "evidence": "osv:CVE-2026-47891",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-47891",
      "aliases": [
        "CVE-2026-47891"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/spring-projects/spring-framework",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "4fd7c19166a4a7ee3a37db4c893ecf9e8b6f5d0a"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "5.2.25.RELEASE"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v5.2.25.RELEASE",
            "v4.0.0.RC2",
            "v4.0.0.RC1",
            "v4.0.0.M3",
            "v4.0.0.M2",
            "v4.0.0.M1",
            "v3.2.0.RELEASE",
            "v3.2.0.RC2-A",
            "v3.2.0.RC1",
            "v3.2.0.M2",
            "v3.2.0.M1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-47891.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:24.741911985Z",
      "provider": "osv",
      "references": [
        "https://spring.io/security/cve-2026-47891",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47891.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-47891"
      ],
      "provider_metadata": {
        "cna_assigner": "vmware",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "7.0.0"
                  },
                  {
                    "last_affected": "7.0.8"
                  },
                  {
                    "introduced": "6.2.0"
                  },
                  {
                    "last_affected": "6.2.19"
                  },
                  {
                    "introduced": "6.1.0"
                  },
                  {
                    "last_affected": "6.1.28"
                  },
                  {
                    "introduced": "6.0.0"
                  },
                  {
                    "last_affected": "6.0.30"
                  },
                  {
                    "introduced": "5.3.0"
                  },
                  {
                    "last_affected": "5.3.49"
                  },
                  {
                    "last_affected": "5.2.25.RELEASE"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47891.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-47891",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 491538,
  "published_at": "2026-08-27T05:21:39.288+00:00"
}