quirc through 1.2 Denial of Service via find_alignment_pattern Spiral Search

{
  "id": "5854d1300348a9d1ec85cfdbd6d4ee8de87b980152014c238e9b74e0d2da6bb7",
  "url": "https://osv.dev/vulnerability/CVE-2026-110596",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "quirc through 1.2 Denial of Service via find_alignment_pattern Spiral Search",
    "summary": "quirc through 1.2 contains an excessive-iteration vulnerability in find_alignment_pattern() in lib/identify.c that allows attackers to hang quirc_end() with a crafted image. Attackers can arrange three finder patterns producing a near-degenerate perspective transform, causing billions of region_code() iterations that exhaust CPU in applications decoding attacker-supplied QR images.",
    "evidence": "osv:CVE-2026-110596",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-110596",
      "aliases": [
        "CVE-2026-110596"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/dlbeer/quirc",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "542848dd6b9b0eaa9587bbf25b9bc67bd8a71fca"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.2"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.2"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.2",
            "v1.1",
            "v1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-110596.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:51.504649121Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/110xxx/CVE-2026-110596.json",
        "https://hackmd.io/@haind-pwn/quirc-alignment-pattern-infinite-loop-dos",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-110596",
        "https://www.vulncheck.com/advisories/quirc-through-1.2-denial-of-service-via-find-alignment-pattern-spiral-search",
        "https://github.com/dlbeer/quirc/issues/162",
        "https://github.com/dlbeer/quirc/pull/159",
        "https://github.com/dlbeer/quirc",
        "https://github.com/dlbeer/quirc/blob/542848dd6b9b0eaa9587bbf25b9bc67bd8a71fca/lib/identify.c#L578-L636"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-834"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/110xxx/CVE-2026-110596.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-110596",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 520384,
  "published_at": "2026-10-14T14:16:39.681+00:00"
}