GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2026-41853 (GCVE-0-2026-41853)

Vulnerability from cvelistv5 – Published: 2026-06-09 03:51 – Updated: 2026-06-27 21:04
VLAI
Title
Spring Framework Multipart Request Smuggling in Spring MVC and WebFlux
Summary
Spring MVC and WebFlux applications are vulnerable to Multipart request smuggling attacks. 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
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-09 13:22 UTC
CWE
  • CWE-444 - Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling)
Assigner
References
Impacted products
Vendor Product Version CPE status
Spring Spring Framework Affected: 7.0.0 , < 7.0.7.1 (custom)
Affected: 6.2.0 , < 6.2.18.1 (custom)
Affected: 6.1.0 , < 6.1.28 (custom)
Affected: 5.3.0 , < 5.3.49 (custom)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-41853",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-09T13:22:10.822220Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-09T13:23:36.844Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Spring Framework",
          "vendor": "Spring",
          "versions": [
            {
              "lessThan": "7.0.7.1",
              "status": "affected",
              "version": "7.0.0",
              "versionType": "custom"
            },
            {
              "lessThan": "6.2.18.1",
              "status": "affected",
              "version": "6.2.0",
              "versionType": "custom"
            },
            {
              "lessThan": "6.1.28",
              "status": "affected",
              "version": "6.1.0",
              "versionType": "custom"
            },
            {
              "lessThan": "5.3.49",
              "status": "affected",
              "version": "5.3.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Spring MVC and WebFlux applications are vulnerable to Multipart request smuggling attacks.\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."
            }
          ],
          "value": "Spring MVC and WebFlux applications are vulnerable to Multipart request smuggling attacks.\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."
        }
      ],
      "impacts": [
        {
          "descriptions": [
            {
              "lang": "en",
              "value": "An attacker can send malicious multipart requests that are parsed differently by the application versus its WAF or proxy, bypassing security checks in applications that accept multipart requests."
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-444",
              "description": "CWE-444: Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-27T21:04:58.496Z",
        "orgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d",
        "shortName": "vmware"
      },
      "references": [
        {
          "url": "https://spring.io/security/cve-2026-41853"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Spring Framework Multipart Request Smuggling in Spring MVC and WebFlux",
      "x_generator": {
        "engine": "Vulnogram 1.0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d",
    "assignerShortName": "vmware",
    "cveId": "CVE-2026-41853",
    "datePublished": "2026-06-09T03:51:44.875Z",
    "dateReserved": "2026-04-22T06:22:08.200Z",
    "dateUpdated": "2026-06-27T21:04:58.496Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-41853",
      "date": "2026-09-16",
      "epss": "0.00186",
      "percentile": "0.08426"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-41853\",\"sourceIdentifier\":\"security@vmware.com\",\"published\":\"2026-06-09T05:16:37.523\",\"lastModified\":\"2026-07-23T08:10:00.137\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Spring MVC and WebFlux applications are vulnerable to Multipart request smuggling attacks.\\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.\"},{\"lang\":\"es\",\"value\":\"Las aplicaciones Spring MVC y WebFlux son vulnerables a ataques de contrabando de solicitudes Multipart.\\n\\nVersiones afectadas:\\nSpring framework 7.0.0 hasta 7.0.7; 6.2.0 hasta 6.2.18; 6.1.0 hasta 6.1.27; 5.3.0 hasta 5.3.48.\"}],\"affected\":[{\"source\":\"security@vmware.com\",\"affectedData\":[{\"vendor\":\"Spring\",\"product\":\"Spring Framework\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"7.0.0\",\"lessThan\":\"7.0.7.1\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"6.2.0\",\"lessThan\":\"6.2.18.1\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"6.1.0\",\"lessThan\":\"6.1.28\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"5.3.0\",\"lessThan\":\"5.3.49\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security@vmware.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N\",\"baseScore\":5.3,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":1.4}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-06-09T13:22:10.822220Z\",\"id\":\"CVE-2026-41853\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"security@vmware.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-444\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.3.0\",\"versionEndExcluding\":\"5.3.49\",\"matchCriteriaId\":\"9394F974-169E-4FB0-A85B-0114477DE421\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.1.0\",\"versionEndExcluding\":\"6.1.28\",\"matchCriteriaId\":\"CE392CE7-5DA3-4DBE-B22C-27781E204B7E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2.0\",\"versionEndExcluding\":\"6.2.18.1\",\"matchCriteriaId\":\"8D4BC30C-3E08-4A62-992D-4D2274844D54\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"7.0.0\",\"versionEndExcluding\":\"7.0.7.1\",\"matchCriteriaId\":\"569A2EF8-281F-4D8A-A76C-79ED67826B38\"}]}]}],\"references\":[{\"url\":\"https://spring.io/security/cve-2026-41853\",\"source\":\"security@vmware.com\",\"tags\":[\"Vendor Advisory\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-24T15:37:53+00:00",
      "cve": "CVE-2026-41853",
      "id": "CVE-2026-41853",
      "initial_release_date": "2026-06-09T03:51:44.875000+00:00",
      "product_status:known_affected": "29",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "Spring Framework: Spring Framework: Request smuggling vulnerability in Spring MVC and WebFlux",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41853.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-41853\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-06-09T13:22:10.822220Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-06-09T13:22:20.747Z\"}}], \"cna\": {\"title\": \"Spring Framework Multipart Request Smuggling in Spring MVC and WebFlux\", \"source\": {\"discovery\": \"UNKNOWN\"}, \"impacts\": [{\"descriptions\": [{\"lang\": \"en\", \"value\": \"An attacker can send malicious multipart requests that are parsed differently by the application versus its WAF or proxy, bypassing security checks in applications that accept multipart requests.\"}]}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.3, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N\", \"integrityImpact\": \"LOW\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"Spring\", \"product\": \"Spring Framework\", \"versions\": [{\"status\": \"affected\", \"version\": \"7.0.0\", \"lessThan\": \"7.0.7.1\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"6.2.0\", \"lessThan\": \"6.2.18.1\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"6.1.0\", \"lessThan\": \"6.1.28\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"5.3.0\", \"lessThan\": \"5.3.49\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://spring.io/security/cve-2026-41853\"}], \"x_generator\": {\"engine\": \"Vulnogram 1.0.1\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"Spring MVC and WebFlux applications are vulnerable to Multipart request smuggling attacks.\\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.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"Spring MVC and WebFlux applications are vulnerable to Multipart request smuggling attacks.\\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.\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-444\", \"description\": \"CWE-444: Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling)\"}]}], \"providerMetadata\": {\"orgId\": \"dcf2e128-44bd-42ed-91e8-88f912c1401d\", \"shortName\": \"vmware\", \"dateUpdated\": \"2026-06-27T21:04:58.496Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-41853\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-06-27T21:04:58.496Z\", \"dateReserved\": \"2026-04-22T06:22:08.200Z\", \"assignerOrgId\": \"dcf2e128-44bd-42ed-91e8-88f912c1401d\", \"datePublished\": \"2026-06-09T03:51:44.875Z\", \"assignerShortName\": \"vmware\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.