Use-of-uninitialized-value in httpEncode64_3

{
  "id": "37fcb638e10b7687302a8df409004128e5c6d28bd5b6382434e3a37ed7fcd04b",
  "url": "https://osv.dev/vulnerability/OSV-2025-542",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Use-of-uninitialized-value in httpEncode64_3",
    "summary": "OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=430110066 ``` Crash type: Use-of-uninitialized-value Crash state: httpEncode64_3 fuzz_http_core.c fuzz_http_core.c ```",
    "evidence": "osv:OSV-2025-542",
    "products": [
      {
        "name": {
          "value": "cups",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "OSV-2025-542",
      "aliases": [
        "OSV-2025-542"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/OpenPrinting/cups",
              "type": "GIT",
              "events": [
                {
                  "introduced": "899362980fe53317fa5931f01b67f45d9b240137"
                }
              ]
            }
          ],
          "package": {
            "name": "cups",
            "purl": "pkg:generic/cups",
            "ecosystem": "OSS-Fuzz"
          },
          "database_specific": {
            "source": "https://github.com/google/oss-fuzz-vulns/blob/main/vulns/cups/OSV-2025-542.yaml",
            "introduced_range": "c2b86f6bf0151d03fd8f30feba87122c671aa51a:bcb4814ead58a66f96b7d33d8b90cd56ac3864af"
          },
          "ecosystem_specific": {
            "severity": "MEDIUM"
          }
        }
      ],
      "modified": "2026-10-19T15:18:13.244229Z",
      "provider": "osv",
      "references": [
        "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=430110066"
      ]
    },
    "related_cves": [],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 375312,
  "published_at": "2025-07-10T00:07:45.69807+00:00"
}