zip: legacy Shrink/Reduce/Implode decoder: denial of service from attacker-controlled ZIP64 uncompressed size

{
  "id": "bb36c157d3f0df14863726b5a903fb673d72ffb2272e99147a42bdca4833efc1",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-115907",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "zip: legacy Shrink/Reduce/Implode decoder: denial of service from attacker-controlled ZIP64 uncompressed size",
    "summary": "zip is a zip library for Rust that supports reading and writing simple ZIP files. From 5.1.0 until 9.0.0, applications built with the legacy-zip feature can reserve output capacity from an attacker-controlled ZIP64 uncompressed size before validating the compressed stream. The ShrinkDecoder path in src/legacy/shrink.rs can panic with a capacity overflow during ZipArchive::extract, and the Reduce and Implode decoders contain the same unbounded preallocation pattern. An unhandled panic can terminate an archive-processing service. This issue is fixed in version 9.0.0.",
    "evidence": "cve:CVE-2026-115907",
    "products": [
      {
        "name": {
          "value": "zip2",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-115907",
      "aliases": [
        "CVE-2026-115907"
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "scope": "UNCHANGED",
            "version": "3.1",
            "baseScore": 7.5,
            "attackVector": "NETWORK",
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "integrityImpact": "NONE",
            "userInteraction": "NONE",
            "attackComplexity": "LOW",
            "availabilityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "confidentialityImpact": "NONE"
          }
        }
      ],
      "affected": [
        {
          "vendor": "zip-rs",
          "product": "zip2",
          "versions": [
            {
              "status": "affected",
              "version": ">= 5.1.0, < 9.0.0"
            }
          ]
        }
      ],
      "modified": "2026-10-26T16:32:15.373Z",
      "provider": "cve",
      "references": [
        "https://github.com/zip-rs/zip2/security/advisories/GHSA-9hj8-73fh-9963",
        "https://github.com/zip-rs/zip2/pull/991",
        "https://github.com/zip-rs/zip2/commit/8b4991288b79ad11cce201c2d785d5baa795bd3e",
        "https://github.com/zip-rs/zip2/releases/tag/v9.0.0"
      ],
      "provider_metadata": {
        "cna": {
          "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
          "shortName": "GitHub_M",
          "dateUpdated": "2026-10-26T16:32:15.373Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-115907",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 320572,
  "published_at": "2026-10-26T16:32:15.373+00:00"
}