CVE-2026-46729 (GCVE-0-2026-46729)

Vulnerability from cvelistv5 – Published: 2026-10-01 15:55 – Updated: 2026-10-01 20:09
VLAI
Title
Apache HTTP Server: mod_heartmonitor denial of service
Summary
NULL Pointer Dereference vulnerability in Apache HTTP Servers mod_heartmonitor over unicast listener. This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-01 16:18 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
apache CNA under the mitre root
CNA scorecard B 76/100 over 1088 records in the last 180 days details
Impacted products
Vendor Product Version CPE status
Apache Software Foundation Apache HTTP Server Affected: 2.4.0 , ≤ 2.4.68 (semver)
guessed Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "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"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-46729",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-01T16:18:18.820261Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-01T16:18:32.908Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2026-10-01T20:09:19.923Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/10/01/13"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Apache HTTP Server",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
              "lessThanOrEqual": "2.4.68",
              "status": "affected",
              "version": "2.4.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Zhang San"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "Ankit Prateek (OffByQuant)"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "Zhen Kong"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "SeungHyun Cho of KISA"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "4ra1n, pyn3rd and unam4"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "Ryoma Nishioka"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "Keita Sode"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eNULL Pointer Dereference vulnerability in Apache HTTP Servers mod_heartmonitor over unicast listener.\u003c/p\u003e\u003cp\u003eThis issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.\u003c/p\u003e\u003cp\u003e\u003cbr\u003e\u003c/p\u003e"
            }
          ],
          "value": "NULL Pointer Dereference vulnerability in Apache HTTP Servers mod_heartmonitor over unicast listener.\n\n\n\nThis issue affects Apache HTTP Server: from 2.4.0 through 2.4.68."
        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "text": "low"
            },
            "type": "Textual description of severity"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-476",
              "description": "CWE-476 NULL Pointer Dereference",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-01T15:55:27.083Z",
        "orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
        "shortName": "apache"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://httpd.apache.org/security/vulnerabilities_24.html"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "timeline": [
        {
          "lang": "en",
          "time": "2026-05-07T12:00:00.000Z",
          "value": "reported"
        },
        {
          "lang": "en",
          "time": "2026-10-01T12:00:00.000Z",
          "value": "fixed in 2.4.x by r1938654"
        },
        {
          "lang": "eng",
          "time": "2026-10-01T12:00:00.000Z",
          "value": "2.4.69 released"
        }
      ],
      "title": "Apache HTTP Server: mod_heartmonitor denial of service",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
    "assignerShortName": "apache",
    "cveId": "CVE-2026-46729",
    "datePublished": "2026-10-01T15:55:27.083Z",
    "dateReserved": "2026-05-17T14:18:39.243Z",
    "dateUpdated": "2026-10-01T20:09:19.923Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-46729",
      "date": "2026-10-23",
      "epss": "0.00468",
      "percentile": "0.3958"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Apache HTTP Server",
                "vendor": "Apache Software Foundation",
                "versions": [
                  {
                    "lessThanOrEqual": "2.4.68",
                    "status": "affected",
                    "version": "2.4.0",
                    "versionType": "semver"
                  }
                ]
              }
            ],
            "source": "security@apache.org"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "2571DF83-8980-4BEF-9EBE-AB2D9E6C03C7",
                    "versionEndExcluding": "2.4.69",
                    "versionStartIncluding": "2.4.0",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "NULL Pointer Dereference vulnerability in Apache HTTP Servers mod_heartmonitor over unicast listener.\n\n\n\nThis issue affects Apache HTTP Server: from 2.4.0 through 2.4.68."
          }
        ],
        "id": "CVE-2026-46729",
        "lastModified": "2026-10-08T00:47:12.233",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "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"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 3.6,
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2026-46729",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "yes"
                  },
                  {
                    "technicalImpact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-01T16:18:18.820261Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2026-10-01T16:17:44.293",
        "references": [
          {
            "source": "security@apache.org",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://httpd.apache.org/security/vulnerabilities_24.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2026/10/01/13"
          }
        ],
        "sourceIdentifier": "security@apache.org",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-476"
              }
            ],
            "source": "security@apache.org",
            "type": "Secondary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-10-22T17:10:17+00:00",
      "cve": "CVE-2026-46729",
      "id": "CVE-2026-46729",
      "initial_release_date": "2026-10-01T15:55:27.083000+00:00",
      "product_status:fixed": "98",
      "product_status:known_affected": "49",
      "product_status:known_not_affected": "6",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "httpd: httpd: mod_heartmonitor: Denial of Service via NULL pointer dereference",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46729.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-10-22T16:43:01Z",
      "cve": "CVE-2026-46729",
      "id": "CVE-2026-46729",
      "initial_release_date": "2026-10-02T16:52:10Z",
      "product_status:known_affected": "255",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-46729",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2026/cve-2026-46729.json",
      "version": "4"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "providerMetadata": {
              "dateUpdated": "2026-10-01T20:09:19.923Z",
              "orgId": "af854a3a-2127-422b-91ae-364da2661108",
              "shortName": "CVE"
            },
            "references": [
              {
                "url": "http://www.openwall.com/lists/oss-security/2026/10/01/13"
              }
            ],
            "title": "CVE Program Container"
          },
          {
            "metrics": [
              {
                "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"
                }
              },
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-46729",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "yes"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-10-01T16:18:18.820261Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-10-01T16:18:28.462Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Apache HTTP Server",
              "vendor": "Apache Software Foundation",
              "versions": [
                {
                  "lessThanOrEqual": "2.4.68",
                  "status": "affected",
                  "version": "2.4.0",
                  "versionType": "semver"
                }
              ]
            }
          ],
          "credits": [
            {
              "lang": "en",
              "type": "finder",
              "value": "Zhang San"
            },
            {
              "lang": "en",
              "type": "finder",
              "value": "Ankit Prateek (OffByQuant)"
            },
            {
              "lang": "en",
              "type": "finder",
              "value": "Zhen Kong"
            },
            {
              "lang": "en",
              "type": "finder",
              "value": "SeungHyun Cho of KISA"
            },
            {
              "lang": "en",
              "type": "finder",
              "value": "4ra1n, pyn3rd and unam4"
            },
            {
              "lang": "en",
              "type": "finder",
              "value": "Ryoma Nishioka"
            },
            {
              "lang": "en",
              "type": "finder",
              "value": "Keita Sode"
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "\u003cp\u003eNULL Pointer Dereference vulnerability in Apache HTTP Servers mod_heartmonitor over unicast listener.\u003c/p\u003e\u003cp\u003eThis issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.\u003c/p\u003e\u003cp\u003e\u003cbr\u003e\u003c/p\u003e"
                }
              ],
              "value": "NULL Pointer Dereference vulnerability in Apache HTTP Servers mod_heartmonitor over unicast listener.\n\n\n\nThis issue affects Apache HTTP Server: from 2.4.0 through 2.4.68."
            }
          ],
          "metrics": [
            {
              "other": {
                "content": {
                  "text": "low"
                },
                "type": "Textual description of severity"
              },
              "scenarios": [
                {
                  "lang": "en",
                  "value": "GENERAL"
                }
              ]
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-476",
                  "description": "CWE-476 NULL Pointer Dereference",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-10-01T15:55:27.083Z",
            "orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
            "shortName": "apache"
          },
          "references": [
            {
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://httpd.apache.org/security/vulnerabilities_24.html"
            }
          ],
          "source": {
            "discovery": "UNKNOWN"
          },
          "timeline": [
            {
              "lang": "en",
              "time": "2026-05-07T12:00:00.000Z",
              "value": "reported"
            },
            {
              "lang": "en",
              "time": "2026-10-01T12:00:00.000Z",
              "value": "fixed in 2.4.x by r1938654"
            },
            {
              "lang": "eng",
              "time": "2026-10-01T12:00:00.000Z",
              "value": "2.4.69 released"
            }
          ],
          "title": "Apache HTTP Server: mod_heartmonitor denial of service",
          "x_generator": {
            "engine": "Vulnogram 0.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
        "assignerShortName": "apache",
        "cveId": "CVE-2026-46729",
        "datePublished": "2026-10-01T15:55:27.083Z",
        "dateReserved": "2026-05-17T14:18:39.243Z",
        "dateUpdated": "2026-10-01T20:09:19.923Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
Events included in the timeline

Loading timeline…


    Loading…

    Loading…

    Loading…

    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.