CVE-2026-92709 (GCVE-0-2026-92709)

Vulnerability from cvelistv5 – Published: 2026-10-22 13:32 – Updated: 2026-10-22 13:32
VLAI
Title
Rsyslog: DynFile Path Traversal → Arbitrary File Write as Root → RCE
Summary
Rsyslog is a rocket-fast system for log processing. From versions 1.15.0 to 8.2610.0, rsyslog's omfile dynaFile facility intentionally allows templates to generate flexible output paths. This supports valid deployments that route logs into different directories or use dynamically generated file names. A deployment becomes unsafe when a dynaFile template uses a value influenced by untrusted input as a path component without explicit secure-path handling. In that configuration, the rendered path can escape the operator's intended log directory. This is not limited to the RFC5424 HOSTNAME field. Any untrusted value that reaches a dynaFile path component can create the condition. At time of publication, there are no publicly available patches.
Severity
8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
  • CWE-73 - External Control of File Name or Path
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7734 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
rsyslog rsyslog Affected: >= 1.15.0, <= 8.2610.0
guessed Create a notification for this product.
Show details on NVD website
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "rsyslog",
          "vendor": "rsyslog",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.15.0, \u003c= 8.2610.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Rsyslog is a rocket-fast system for log processing. From versions 1.15.0 to 8.2610.0, rsyslog\u0027s omfile dynaFile facility intentionally allows templates to generate flexible output paths. This supports valid deployments that route logs into different directories or use dynamically generated file names. A deployment becomes unsafe when a dynaFile template uses a value influenced by untrusted input as a path component without explicit secure-path handling. In that configuration, the rendered path can escape the operator\u0027s intended log directory. This is not limited to the RFC5424 HOSTNAME field. Any untrusted value that reaches a dynaFile path component can create the condition. At time of publication, there are no publicly available patches."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-22",
              "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-73",
              "description": "CWE-73: External Control of File Name or Path",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-22T13:32:56.695Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/rsyslog/rsyslog/security/advisories/GHSA-xmp9-244p-5ggv",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/rsyslog/rsyslog/security/advisories/GHSA-xmp9-244p-5ggv"
        }
      ],
      "source": {
        "advisory": "GHSA-xmp9-244p-5ggv",
        "discovery": "UNKNOWN"
      },
      "title": "Rsyslog: DynFile Path Traversal \u2192 Arbitrary File Write as Root \u2192 RCE"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-92709",
    "datePublished": "2026-10-22T13:32:56.695Z",
    "dateReserved": "2026-09-16T16:22:31.542Z",
    "dateUpdated": "2026-10-22T13:32:56.695Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-92709",
      "date": "2026-10-23",
      "epss": "0.00452",
      "percentile": "0.38323"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "rsyslog",
                "vendor": "rsyslog",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003e= 1.15.0, \u003c= 8.2610.0"
                  }
                ]
              }
            ],
            "source": "security-advisories@github.com"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Rsyslog is a rocket-fast system for log processing. From versions 1.15.0 to 8.2610.0, rsyslog\u0027s omfile dynaFile facility intentionally allows templates to generate flexible output paths. This supports valid deployments that route logs into different directories or use dynamically generated file names. A deployment becomes unsafe when a dynaFile template uses a value influenced by untrusted input as a path component without explicit secure-path handling. In that configuration, the rendered path can escape the operator\u0027s intended log directory. This is not limited to the RFC5424 HOSTNAME field. Any untrusted value that reaches a dynaFile path component can create the condition. At time of publication, there are no publicly available patches."
          }
        ],
        "id": "CVE-2026-92709",
        "lastModified": "2026-10-22T17:29:28.470",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "HIGH",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 8.1,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 2.2,
              "impactScore": 5.9,
              "source": "security-advisories@github.com",
              "type": "Secondary"
            }
          ]
        },
        "published": "2026-10-22T14:17:51.473",
        "references": [
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/rsyslog/rsyslog/security/advisories/GHSA-xmp9-244p-5ggv"
          }
        ],
        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Awaiting Analysis",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-22"
              },
              {
                "lang": "en",
                "value": "CWE-73"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-10-22T19:30:31+00:00",
      "cve": "CVE-2026-92709",
      "id": "CVE-2026-92709",
      "initial_release_date": "2026-10-22T13:32:56.695000+00:00",
      "product_status:known_affected": "100",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "rsyslog: rsyslog: Path traversal via unsanitized dynaFile templates",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-92709.json",
      "version": "3"
    }
  }
}



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