CVE-2026-5939 (GCVE-0-2026-5939)

Vulnerability from cvelistv5 – Published: 2026-04-27 11:00 – Updated: 2026-04-28 12:50
VLAI?
Title
UAF in Foxit PDF Editor/Reader via XFA calculate event
Summary
A crafted XFA PDF can trigger a use-after-free condition during calculate event processing, causing the application to crash and resulting in an arbitrary code execution.
Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
Foxit Software Inc. Foxit PDF Editor Affected: Versions 2026.1 and earlier
Affected: Versions 14.0.3 and earlier
Create a notification for this product.
Credits
Haein Lee from KAIST Hacking Lab
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-5939",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-28T03:55:25.421518Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-28T12:50:41.920Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "platforms": [
            "Windows"
          ],
          "product": "Foxit PDF Editor",
          "vendor": "Foxit Software Inc.",
          "versions": [
            {
              "status": "affected",
              "version": "Versions 2026.1 and earlier"
            },
            {
              "status": "affected",
              "version": "Versions 14.0.3 and earlier"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "platforms": [
            "Windows"
          ],
          "product": "Foxit PDF Reader",
          "vendor": "Foxit Software Inc.",
          "versions": [
            {
              "status": "affected",
              "version": "Versions 2026.1 and earlier"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Haein Lee from KAIST Hacking Lab"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "A crafted XFA PDF can trigger a use-after-free condition during calculate event processing, causing the application to crash and resulting in an arbitrary code execution."
            }
          ],
          "value": "A crafted XFA PDF can trigger a use-after-free condition during calculate event processing, causing the application to crash and resulting in an arbitrary code execution."
        }
      ],
      "impacts": [
        {
          "descriptions": [
            {
              "lang": "en",
              "value": "Potential arbitrary code execution"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-416",
              "description": "CWE-416 Use after free",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-27T11:00:29.102Z",
        "orgId": "14984358-7092-470d-8f34-ade47a7658a2",
        "shortName": "Foxit"
      },
      "references": [
        {
          "url": "https://www.foxit.com/support/security-bulletins.html"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "UAF in Foxit PDF Editor/Reader via XFA calculate event",
      "x_generator": {
        "engine": "Vulnogram 1.0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "14984358-7092-470d-8f34-ade47a7658a2",
    "assignerShortName": "Foxit",
    "cveId": "CVE-2026-5939",
    "datePublished": "2026-04-27T11:00:29.102Z",
    "dateReserved": "2026-04-09T03:42:09.733Z",
    "dateUpdated": "2026-04-28T12:50:41.920Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-5939",
      "date": "2026-04-28",
      "epss": "0.00015",
      "percentile": "0.03127"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-5939\",\"sourceIdentifier\":\"14984358-7092-470d-8f34-ade47a7658a2\",\"published\":\"2026-04-27T12:16:24.263\",\"lastModified\":\"2026-04-27T18:57:20.293\",\"vulnStatus\":\"Undergoing Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A crafted XFA PDF can trigger a use-after-free condition during calculate event processing, causing the application to crash and resulting in an arbitrary code execution.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"14984358-7092-470d-8f34-ade47a7658a2\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"REQUIRED\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"14984358-7092-470d-8f34-ade47a7658a2\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"references\":[{\"url\":\"https://www.foxit.com/support/security-bulletins.html\",\"source\":\"14984358-7092-470d-8f34-ade47a7658a2\"}]}}",
    "vulnrichment": {
      "containers": "{\"cna\": {\"providerMetadata\": {\"orgId\": \"14984358-7092-470d-8f34-ade47a7658a2\", \"shortName\": \"Foxit\", \"dateUpdated\": \"2026-04-27T11:00:29.102Z\"}, \"title\": \"UAF in Foxit PDF Editor/Reader via XFA calculate event\", \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"cweId\": \"CWE-416\", \"description\": \"CWE-416 Use after free\", \"type\": \"CWE\"}]}], \"impacts\": [{\"descriptions\": [{\"lang\": \"en\", \"value\": \"Potential arbitrary code execution\"}]}], \"affected\": [{\"vendor\": \"Foxit Software Inc.\", \"product\": \"Foxit PDF Editor\", \"platforms\": [\"Windows\"], \"versions\": [{\"status\": \"affected\", \"version\": \"Versions 2026.1 and earlier\"}, {\"status\": \"affected\", \"version\": \"Versions 14.0.3 and earlier\"}], \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"Foxit Software Inc.\", \"product\": \"Foxit PDF Reader\", \"platforms\": [\"Windows\"], \"versions\": [{\"status\": \"affected\", \"version\": \"Versions 2026.1 and earlier\"}], \"defaultStatus\": \"unaffected\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"A crafted XFA PDF can trigger a use-after-free condition during calculate event processing, causing the application to crash and resulting in an arbitrary code execution.\", \"supportingMedia\": [{\"type\": \"text/html\", \"base64\": false, \"value\": \"A crafted XFA PDF can trigger a use-after-free condition during calculate event processing, causing the application to crash and resulting in an arbitrary code execution.\"}]}], \"references\": [{\"url\": \"https://www.foxit.com/support/security-bulletins.html\"}], \"metrics\": [{\"format\": \"CVSS\", \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}], \"cvssV3_1\": {\"version\": \"3.1\", \"attackVector\": \"LOCAL\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"REQUIRED\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"HIGH\", \"baseSeverity\": \"MEDIUM\", \"baseScore\": 5.5, \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H\"}}], \"credits\": [{\"lang\": \"en\", \"value\": \"Haein Lee from KAIST Hacking Lab\", \"type\": \"finder\"}], \"source\": {\"discovery\": \"UNKNOWN\"}, \"x_generator\": {\"engine\": \"Vulnogram 1.0.1\"}}, \"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-5939\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-04-28T03:55:25.421518Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-04-27T13:40:21.534Z\"}}]}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-5939\", \"assignerOrgId\": \"14984358-7092-470d-8f34-ade47a7658a2\", \"state\": \"PUBLISHED\", \"assignerShortName\": \"Foxit\", \"dateReserved\": \"2026-04-09T03:42:09.733Z\", \"datePublished\": \"2026-04-27T11:00:29.102Z\", \"dateUpdated\": \"2026-04-28T12:50:41.920Z\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

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.