zlib-1.2.11, zlib-1.3.1 and 1 more products — security advisory

{
  "id": "83f8c15e888cb2219bc953878085fb7f7a1d20905c8129786700d8f4ba98372a",
  "url": "https://osv.dev/vulnerability/ECHO-355f-9f1c-25e5",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ECHO-355f-9f1c-25e5",
    "summary": "ECHO-355f-9f1c-25e5",
    "evidence": "osv:ECHO-355f-9f1c-25e5",
    "products": [
      {
        "name": {
          "value": "zlib-1.2.11",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.2.11+e1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "zlib-1.3.1",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.3.1+e1",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "zlib-1.3.2",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.3.2+e1",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "ECHO-355f-9f1c-25e5",
      "aliases": [
        "ECHO-355f-9f1c-25e5"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.2.11+e1"
                }
              ]
            }
          ],
          "package": {
            "name": "zlib-1.2.11",
            "purl": "pkg:deb/echo/zlib-1.2.11",
            "ecosystem": "Echo"
          },
          "database_specific": {
            "source": "https://advisory.echohq.com/osv/ECHO-355f-9f1c-25e5.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.3.1+e1"
                }
              ]
            }
          ],
          "package": {
            "name": "zlib-1.3.1",
            "purl": "pkg:deb/echo/zlib-1.3.1",
            "ecosystem": "Echo"
          },
          "database_specific": {
            "source": "https://advisory.echohq.com/osv/ECHO-355f-9f1c-25e5.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.3.2+e1"
                }
              ]
            }
          ],
          "package": {
            "name": "zlib-1.3.2",
            "purl": "pkg:deb/echo/zlib-1.3.2",
            "ecosystem": "Echo"
          },
          "database_specific": {
            "source": "https://advisory.echohq.com/osv/ECHO-355f-9f1c-25e5.json"
          }
        }
      ],
      "modified": "2026-10-15T12:15:03.090781448Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-76844"
      ],
      "references": [
        "https://advisory.echohq.com/cve/CVE-2026-76844",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-76844",
        "https://gist.github.com/thesmartshadow/e0b9481792afb7c31e86fee1ff084490",
        "https://github.com/madler/zlib",
        "https://github.com/madler/zlib/blob/v1.3.2/gzwrite.c#L393",
        "https://github.com/madler/zlib/commit/df84af25dc1942490e1d1c899a07619152a46148",
        "https://www.vulncheck.com/advisories/zlib-1.3.1.2-through-1.3.2-heap-buffer-overflow-via-gz-vacate"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-76844",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 331362,
  "published_at": "2026-10-15T11:42:10.138+00:00"
}