CVE-2026-40986 (GCVE-0-2026-40986)

Vulnerability from cvelistv5 – Published: 2026-06-11 05:03 – Updated: 2026-06-11 12:46
VLAI
Title
Spring Web Flow JS RemotingHandler renders non-HTML Response as HTML
Summary
Spring Web Flow's JavaScript RemotingHandler renders the body of an error response as HTML even when the response is not "text/html", which can result in a scripting attack in the user's browser if the error response from the server contains error details with input reflected from an attacker. Affected versions: Spring Web Flow 4.0.0; 3.0.0 through 3.0.1; 2.5.0 through 2.5.1.
Severity
4.8 (Medium)
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation (Cross-site Scripting)
Assigner
References
Impacted products
Vendor Product Version
Spring Spring Web Flow Affected: 4.0.0 , < 4.0.1 (custom)
Affected: 3.0.0 , < 3.0.2 (custom)
Affected: 2.5.0 , < 2.5.2 (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-40986",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-11T12:46:39.516114Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-11T12:46:45.896Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Spring Web Flow",
          "vendor": "Spring",
          "versions": [
            {
              "lessThan": "4.0.1",
              "status": "affected",
              "version": "4.0.0",
              "versionType": "custom"
            },
            {
              "lessThan": "3.0.2",
              "status": "affected",
              "version": "3.0.0",
              "versionType": "custom"
            },
            {
              "lessThan": "2.5.2",
              "status": "affected",
              "version": "2.5.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Spring Web Flow\u0027s JavaScript RemotingHandler renders the body of an error response as HTML even when the response is not \"text/html\", which can result in a scripting attack in the user\u0027s browser if the error response from the server contains error details with input reflected from an attacker.\n\nAffected versions:\nSpring Web Flow 4.0.0; 3.0.0 through 3.0.1; 2.5.0 through 2.5.1."
            }
          ],
          "value": "Spring Web Flow\u0027s JavaScript RemotingHandler renders the body of an error response as HTML even when the response is not \"text/html\", which can result in a scripting attack in the user\u0027s browser if the error response from the server contains error details with input reflected from an attacker.\n\nAffected versions:\nSpring Web Flow 4.0.0; 3.0.0 through 3.0.1; 2.5.0 through 2.5.1."
        }
      ],
      "impacts": [
        {
          "descriptions": [
            {
              "lang": "en",
              "value": "An attacker who can influence error responses from the server can cause Spring Web Flow\u0027s JavaScript RemotingHandler to render attacker-controlled content as HTML in the user\u0027s browser."
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79: Improper Neutralization of Input During Web Page Generation (Cross-site Scripting)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-11T05:03:26.458Z",
        "orgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d",
        "shortName": "vmware"
      },
      "references": [
        {
          "url": "https://spring.io/security/cve-2026-40986"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Spring Web Flow JS RemotingHandler renders non-HTML Response as HTML",
      "x_generator": {
        "engine": "Vulnogram 1.0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d",
    "assignerShortName": "vmware",
    "cveId": "CVE-2026-40986",
    "datePublished": "2026-06-11T05:03:26.458Z",
    "dateReserved": "2026-04-16T02:19:09.389Z",
    "dateUpdated": "2026-06-11T12:46:45.896Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-40986",
      "date": "2026-06-11",
      "epss": "0.0003",
      "percentile": "0.09203"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-40986\",\"sourceIdentifier\":\"security@vmware.com\",\"published\":\"2026-06-11T07:16:26.920\",\"lastModified\":\"2026-06-11T15:21:30.653\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Spring Web Flow\u0027s JavaScript RemotingHandler renders the body of an error response as HTML even when the response is not \\\"text/html\\\", which can result in a scripting attack in the user\u0027s browser if the error response from the server contains error details with input reflected from an attacker.\\n\\nAffected versions:\\nSpring Web Flow 4.0.0; 3.0.0 through 3.0.1; 2.5.0 through 2.5.1.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security@vmware.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N\",\"baseScore\":4.8,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"REQUIRED\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":1.2,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"security@vmware.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-79\"}]}],\"references\":[{\"url\":\"https://spring.io/security/cve-2026-40986\",\"source\":\"security@vmware.com\"}]}}",
    "vulnrichment": {
      "containers": "{\"cna\": {\"providerMetadata\": {\"orgId\": \"dcf2e128-44bd-42ed-91e8-88f912c1401d\", \"shortName\": \"vmware\", \"dateUpdated\": \"2026-06-11T05:03:26.458Z\"}, \"title\": \"Spring Web Flow JS RemotingHandler renders non-HTML Response as HTML\", \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"cweId\": \"CWE-79\", \"description\": \"CWE-79: Improper Neutralization of Input During Web Page Generation (Cross-site Scripting)\", \"type\": \"CWE\"}]}], \"impacts\": [{\"descriptions\": [{\"lang\": \"en\", \"value\": \"An attacker who can influence error responses from the server can cause Spring Web Flow\u0027s JavaScript RemotingHandler to render attacker-controlled content as HTML in the user\u0027s browser.\"}]}], \"affected\": [{\"vendor\": \"Spring\", \"product\": \"Spring Web Flow\", \"defaultStatus\": \"unaffected\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.0.0\", \"lessThan\": \"4.0.1\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"3.0.0\", \"lessThan\": \"3.0.2\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"2.5.0\", \"lessThan\": \"2.5.2\", \"versionType\": \"custom\"}]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"Spring Web Flow\u0027s JavaScript RemotingHandler renders the body of an error response as HTML even when the response is not \\\"text/html\\\", which can result in a scripting attack in the user\u0027s browser if the error response from the server contains error details with input reflected from an attacker.\\n\\nAffected versions:\\nSpring Web Flow 4.0.0; 3.0.0 through 3.0.1; 2.5.0 through 2.5.1.\", \"supportingMedia\": [{\"type\": \"text/html\", \"base64\": false, \"value\": \"Spring Web Flow\u0027s JavaScript RemotingHandler renders the body of an error response as HTML even when the response is not \\\"text/html\\\", which can result in a scripting attack in the user\u0027s browser if the error response from the server contains error details with input reflected from an attacker.\\n\\nAffected versions:\\nSpring Web Flow 4.0.0; 3.0.0 through 3.0.1; 2.5.0 through 2.5.1.\"}]}], \"references\": [{\"url\": \"https://spring.io/security/cve-2026-40986\"}], \"metrics\": [{\"format\": \"CVSS\", \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}], \"cvssV3_1\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"userInteraction\": \"REQUIRED\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"HIGH\", \"availabilityImpact\": \"NONE\", \"baseScore\": 4.8, \"baseSeverity\": \"MEDIUM\"}}], \"source\": {\"discovery\": \"UNKNOWN\"}, \"x_generator\": {\"engine\": \"Vulnogram 1.0.1\"}}, \"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-40986\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-06-11T12:46:39.516114Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-06-11T12:46:42.533Z\"}}]}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-40986\", \"assignerOrgId\": \"dcf2e128-44bd-42ed-91e8-88f912c1401d\", \"state\": \"PUBLISHED\", \"assignerShortName\": \"vmware\", \"dateReserved\": \"2026-04-16T02:19:09.389Z\", \"datePublished\": \"2026-06-11T05:03:26.458Z\", \"dateUpdated\": \"2026-06-11T12:46:45.896Z\"}",
      "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.