« Volver al listado

CVE-2026-42926

Estado: AnalizadaMedia (6.3)—

When NGINX Open Source is configured to proxy HTTP/2 traffic by setting proxy_http_version to 2, and also uses proxy_set_body, an attacker may be able to inject frame headers and payload bytes to the upstream peer.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (4)

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-42926",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-42926",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-05-13T15:54:52.773305Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "f5sirt@f5.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 5.8,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 3.9
      }
    ],
    "cvssMetricV40": [
      {
        "type": "Secondary",
        "source": "f5sirt@f5.com",
        "cvssData": {
          "Safety": "NOT_DEFINED",
          "version": "4.0",
          "Recovery": "NOT_DEFINED",
          "baseScore": 6.3,
          "Automatable": "NOT_DEFINED",
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "exploitMaturity": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "attackRequirements": "PRESENT",
          "privilegesRequired": "NONE",
          "subIntegrityImpact": "LOW",
          "vulnIntegrityImpact": "NONE",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "vulnAvailabilityImpact": "NONE",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "subConfidentialityImpact": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "confidentialityRequirement": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
        }
      }
    ]
  },
  "affected": [
    {
      "source": "f5sirt@f5.com",
      "affectedData": [
        {
          "vendor": "F5",
          "modules": [
            "ngx_http_proxy_v2_module"
          ],
          "product": "NGINX Open Source",
          "versions": [
            {
              "status": "unaffected",
              "version": "1.31.0",
              "lessThan": "*",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "1.29.4",
              "lessThan": "1.30.1",
              "versionType": "semver"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-05-13T16:16:49.640",
  "references": [
    {
      "url": "https://my.f5.com/manage/s/article/K000161131",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ],
      "source": "f5sirt@f5.com"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "f5sirt@f5.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-172"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "When NGINX Open Source is configured to proxy HTTP/2 traffic by setting proxy_http_version to 2, and also uses proxy_set_body, an attacker may be able to inject frame headers and payload bytes to the upstream peer.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated."
    }
  ],
  "lastModified": "2026-06-18T13:37:05.800",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:f5:nginx_gateway_fabric:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "15B7F1FD-0C49-460F-9CB8-23DA730EC4BE",
              "versionEndIncluding": "1.6.2",
              "versionStartIncluding": "1.3.0"
            },
            {
              "criteria": "cpe:2.3:a:f5:nginx_open_source:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B99F7F00-2660-4609-A231-8F7E53A105A0",
              "versionEndIncluding": "1.30.0",
              "versionStartIncluding": "1.29.4"
            }
          ],
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:f5:nginx_gateway_fabric:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0A6AA23F-A7A1-43DE-AD67-0EB1249143A4",
              "versionEndIncluding": "2.6.0",
              "versionStartIncluding": "2.0.0"
            },
            {
              "criteria": "cpe:2.3:a:f5:nginx_instance_manager:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "CBC31553-99DE-4155-A8E5-13A84FCCB610",
              "versionEndIncluding": "2.22.0",
              "versionStartIncluding": "2.16.0"
            }
          ],
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:f5:nginx_ingress_controller:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "10D5B143-4C1E-4626-8B49-3EA7160E9256",
              "versionEndIncluding": "3.7.2",
              "versionStartIncluding": "3.5.0"
            },
            {
              "criteria": "cpe:2.3:a:f5:nginx_ingress_controller:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "73A1CDBB-49F6-4AB6-AA67-542FD8017D6A",
              "versionEndIncluding": "4.0.1",
              "versionStartIncluding": "4.0.0"
            },
            {
              "criteria": "cpe:2.3:a:f5:nginx_ingress_controller:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "607EEFA3-BE2A-4660-8C67-E6FC9799325F",
              "versionEndIncluding": "5.4.2",
              "versionStartIncluding": "5.0.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "f5sirt@f5.com"
}