logstash-9.5 — security advisory

{
  "id": "03f90f56524ef46df869387bc4fae6fad3529e66fe32bf3c4fca9725cfa48c75",
  "url": "https://osv.dev/vulnerability/CGA-5rf9-rx6c-mghh",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CGA-5rf9-rx6c-mghh",
    "summary": "CGA-5rf9-rx6c-mghh",
    "evidence": "osv:CGA-5rf9-rx6c-mghh",
    "products": [
      {
        "name": {
          "value": "logstash-9.5",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "9.5.5-r0",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CGA-5rf9-rx6c-mghh",
      "aliases": [
        "CGA-5rf9-rx6c-mghh"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "9.5.5-r0"
                }
              ]
            }
          ],
          "package": {
            "name": "logstash-9.5",
            "purl": "pkg:apk/chainguard/logstash-9.5?arch=x86_64",
            "ecosystem": "Chainguard"
          },
          "database_specific": {
            "source": "https://advisories.cgr.dev/chainguard/v3/osv/CGA-5rf9-rx6c-mghh.json",
            "chainguard": {
              "applies_to_subpackages": false
            }
          },
          "ecosystem_specific": {
            "components": [
              {
                "component_name": "rubyzip",
                "component_purl": "pkg:gem/rubyzip@1.3.0",
                "component_type": "gem",
                "component_version": "1.3.0",
                "component_location": "/usr/share/logstash/vendor/bundle/jruby/3.4.0/specifications/rubyzip-1.3.0.gemspec",
                "latest_event_status": "fixed",
                "latest_event_timestamp": "2026-10-19T16:54:09Z"
              }
            ]
          }
        }
      ],
      "modified": "2026-10-19T21:30:30.691217059Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-85396",
        "GHSA-47m2-wp7j-p9vc"
      ],
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85396.json",
        "https://github.com/rubyzip/rubyzip/releases/tag/v3.4.0",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-85396",
        "https://www.vulncheck.com/advisories/rubyzip-before-3.4.0-path-traversal-in-zip-entry-extract-via-sibling-directory-prefix",
        "https://github.com/rubyzip/rubyzip/commit/17edfbf4423b83211b075acc23a7d8640da63449",
        "https://github.com/rubyzip/rubyzip",
        "https://github.com/geo-chen/oss/blob/main/rubyzip.md",
        "https://github.com/rubyzip/rubyzip/blob/v3.3.1/lib/zip/entry.rb"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-85396",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 375968,
  "published_at": "2026-09-26T05:16:17+00:00"
}