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    2 vulnerabilities by jorisvink

    CVE-2026-121727 (GCVE-0-2026-121727)

    Vulnerability from nvd – Published: 2026-11-03 22:55 – Updated: 2026-11-03 22:55
    VLAI
    Title
    Kore before 4.3.0 Integer Underflow Memory Exhaustion via http_header_recv()
    Summary
    Kore before 4.3.0 contains an integer underflow vulnerability in HTTP request body handling that allows unauthenticated attackers to bypass http_body_max by sending more body bytes than declared. Attackers can send oversized first segments over many concurrent POST, PUT or DELETE connections, wrapping content_length to grow buffers unbounded and exhaust worker memory.
    Severity
    8.7 (High)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
    7.5 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    CWE
    • CWE-191 - Integer Underflow (Wrap or Wraparound)
    Assigner
    VulnCheck CNA under the mitre root
    CNA scorecard B 84/100 over 7427 records in the last 180 days details
    References
    Impacted products
    Vendor Product Version
    jorisvink kore Affected: 0 , < 4.3.0 (semver)
    		Create a notification for this product.
    Date Public
    2026-09-02 00:00
    Credits
    Tristan Madani Joris Vink
    Show details on NVD website
    To clipboard 

    {
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:github/jorisvink/kore",
          "product": "kore",
          "vendor": "jorisvink",
          "versions": [
            {
              "lessThan": "4.3.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Tristan Madani"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Joris Vink"
        }
      ],
      "datePublic": "2026-09-02T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "Kore before 4.3.0 contains an integer underflow vulnerability in HTTP request body handling that allows unauthenticated attackers to bypass http_body_max by sending more body bytes than declared. Attackers can send oversized first segments over many concurrent POST, PUT or DELETE connections, wrapping content_length to grow buffers unbounded and exhaust worker memory."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          },
          "format": "CVSS"
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-191",
              "description": "Integer Underflow (Wrap or Wraparound)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-03T22:55:33.948Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "Patch Commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/jorisvink/kore/commit/1ff3c0f6f7973dc7fc8bf38369790ef2d8079b3b"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/jorisvink/kore"
        },
        {
          "name": "Kore 4.3.0 Release Notes",
          "tags": [
            "release-notes"
          ],
          "url": "https://kore.io/releases/4.3.0"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/jorisvink/kore/blob/4.3.0-rc5/src/http.c#L934"
        },
        {
          "name": "VulnCheck Advisory: Kore before 4.3.0 Integer Underflow Memory Exhaustion via http_header_recv()",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/kore-before-4.3.0-integer-underflow-memory-exhaustion-via-http-header-recv"
        }
      ],
      "title": "Kore before 4.3.0 Integer Underflow Memory Exhaustion via http_header_recv()",
      "x_generator": {
        "engine": "vulncheck-endgame"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-121727",
    "datePublished": "2026-11-03T22:55:33.948Z",
    "dateReserved": "2026-11-03T22:17:02.851Z",
    "dateUpdated": "2026-11-03T22:55:33.948Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

    CVE-2026-121727 (GCVE-0-2026-121727)

    Vulnerability from cvelistv5 – Published: 2026-11-03 22:55 – Updated: 2026-11-03 22:55
    VLAI
    Title
    Kore before 4.3.0 Integer Underflow Memory Exhaustion via http_header_recv()
    Summary
    Kore before 4.3.0 contains an integer underflow vulnerability in HTTP request body handling that allows unauthenticated attackers to bypass http_body_max by sending more body bytes than declared. Attackers can send oversized first segments over many concurrent POST, PUT or DELETE connections, wrapping content_length to grow buffers unbounded and exhaust worker memory.
    Severity
    8.7 (High)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
    7.5 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    CWE
    • CWE-191 - Integer Underflow (Wrap or Wraparound)
    Assigner
    VulnCheck CNA under the mitre root
    CNA scorecard B 84/100 over 7427 records in the last 180 days details
    References
    Impacted products
    Vendor Product Version
    jorisvink kore Affected: 0 , < 4.3.0 (semver)
    		Create a notification for this product.
    Date Public
    2026-09-02 00:00
    Credits
    Tristan Madani Joris Vink
    Show details on NVD website
    To clipboard 

    {
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:github/jorisvink/kore",
          "product": "kore",
          "vendor": "jorisvink",
          "versions": [
            {
              "lessThan": "4.3.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Tristan Madani"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Joris Vink"
        }
      ],
      "datePublic": "2026-09-02T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "Kore before 4.3.0 contains an integer underflow vulnerability in HTTP request body handling that allows unauthenticated attackers to bypass http_body_max by sending more body bytes than declared. Attackers can send oversized first segments over many concurrent POST, PUT or DELETE connections, wrapping content_length to grow buffers unbounded and exhaust worker memory."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          },
          "format": "CVSS"
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-191",
              "description": "Integer Underflow (Wrap or Wraparound)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-03T22:55:33.948Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "Patch Commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/jorisvink/kore/commit/1ff3c0f6f7973dc7fc8bf38369790ef2d8079b3b"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/jorisvink/kore"
        },
        {
          "name": "Kore 4.3.0 Release Notes",
          "tags": [
            "release-notes"
          ],
          "url": "https://kore.io/releases/4.3.0"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/jorisvink/kore/blob/4.3.0-rc5/src/http.c#L934"
        },
        {
          "name": "VulnCheck Advisory: Kore before 4.3.0 Integer Underflow Memory Exhaustion via http_header_recv()",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/kore-before-4.3.0-integer-underflow-memory-exhaustion-via-http-header-recv"
        }
      ],
      "title": "Kore before 4.3.0 Integer Underflow Memory Exhaustion via http_header_recv()",
      "x_generator": {
        "engine": "vulncheck-endgame"
      }
    }
  },
  "cveMetadata": {
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    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-121727",
    "datePublished": "2026-11-03T22:55:33.948Z",
    "dateReserved": "2026-11-03T22:17:02.851Z",
    "dateUpdated": "2026-11-03T22:55:33.948Z",
    "state": "PUBLISHED"
  },
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}