Fickling has Static Analysis Bypass via Incomplete Dangerous Module Blocklist

{
  "id": "a1d5c2bf54adad9ca2edc22e6a0638ed916fc4761e48623574d8134a46d93b6d",
  "url": "https://osv.dev/vulnerability/CVE-2026-22609",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Fickling has Static Analysis Bypass via Incomplete Dangerous Module Blocklist",
    "summary": "Fickling is a Python pickling decompiler and static analyzer. Prior to version 0.1.7, the unsafe_imports() method in Fickling's static analyzer fails to flag several high-risk Python modules that can be used for arbitrary code execution. Malicious pickles importing these modules will not be detected as unsafe, allowing attackers to bypass Fickling's primary static safety checks. This issue has been patched in version 0.1.7.",
    "evidence": "osv:CVE-2026-22609",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-22609",
      "aliases": [
        "CVE-2026-22609",
        "GHSA-q5qq-mvfm-j35x",
        "PYSEC-2026-1372"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/trailofbits/fickling",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "977b0769c13537cd96549c12bb537f05464cf09c"
                },
                {
                  "fixed": "29d5545e74b07766892c1f0461b801afccee4f91"
                },
                {
                  "fixed": "9a2b3f89bd0598b528d62c10a64c1986fcb09f66"
                },
                {
                  "fixed": "b793563e60a5e039c5837b09d7f4f6b92e6040d1"
                },
                {
                  "fixed": "eb299b453342f1931c787bcb3bc33f3a03a173f9"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:trailofbits:fickling:*:*:*:*:*:python:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.1.7"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "29d5545e74b07766892c1f0461b801afccee4f91"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "9a2b3f89bd0598b528d62c10a64c1986fcb09f66"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "b793563e60a5e039c5837b09d7f4f6b92e6040d1"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "eb299b453342f1931c787bcb3bc33f3a03a173f9"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "977b0769c13537cd96549c12bb537f05464cf09c"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v0.1.7"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.1.6",
            "v0.1.5",
            "v0.1.4",
            "master",
            "v0.1.3",
            "v0.1.2",
            "v0.1.1",
            "v0.1.0",
            "v0.0.8",
            "v0.0.7",
            "v0.0.6",
            "v0.0.5",
            "v0.0.4",
            "v0.0.3",
            "v0.0.2",
            "v0.0.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-22609.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:46.013613322Z",
      "provider": "osv",
      "references": [
        "https://github.com/trailofbits/fickling/releases/tag/v0.1.7",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/22xxx/CVE-2026-22609.json",
        "https://github.com/trailofbits/fickling/security/advisories/GHSA-q5qq-mvfm-j35x",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-22609",
        "https://github.com/trailofbits/fickling/commit/29d5545e74b07766892c1f0461b801afccee4f91",
        "https://github.com/trailofbits/fickling/commit/9a2b3f89bd0598b528d62c10a64c1986fcb09f66",
        "https://github.com/trailofbits/fickling/commit/b793563e60a5e039c5837b09d7f4f6b92e6040d1",
        "https://github.com/trailofbits/fickling/commit/eb299b453342f1931c787bcb3bc33f3a03a173f9"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-184",
          "CWE-502"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/22xxx/CVE-2026-22609.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-22609",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 514098,
  "published_at": "2026-01-10T01:35:18.152+00:00"
}