langchain-ai langgraph Task Result Cache _cache.py _freeze weak hash

{
  "id": "72ff210b46afb53c8638ec6f762c8b3d4edc12bc8386ec2587b94b3375a1941e",
  "url": "https://osv.dev/vulnerability/CVE-2026-14742",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "langchain-ai langgraph Task Result Cache _cache.py _freeze weak hash",
    "summary": "A vulnerability was determined in langchain-ai langgraph up to 1.2.4. The affected element is the function _freeze of the file libs/langgraph/langgraph/_internal/_cache.py of the component Task Result Cache. This manipulation of the argument default_cache_key causes use of weak hash. The attack is possible to be carried out remotely. The complexity of an attack is rather high. The exploitability is described as difficult. The exploit has been publicly disclosed and may be utilized. The pull request to fix this issue awaits acceptance.",
    "evidence": "osv:CVE-2026-14742",
    "products": [],
    "severity": "low",
    "structured": {
      "id": "CVE-2026-14742",
      "aliases": [
        "CVE-2026-14742"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/langchain-ai/langgraph",
              "type": "GIT",
              "events": [
                {
                  "introduced": "3614e88c58af63f597764218646e85c49952b2da"
                },
                {
                  "last_affected": "054a6f3d8b48d022a4881af3ba3dc0ddc3ac0690"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "1.2.0"
                      },
                      {
                        "last_affected": "1.2.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "introduced": "1.2.1"
                      },
                      {
                        "last_affected": "1.2.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "introduced": "1.2.2"
                      },
                      {
                        "last_affected": "1.2.2"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "introduced": "1.2.3"
                      },
                      {
                        "last_affected": "1.2.3"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "introduced": "1.2.4"
                      },
                      {
                        "last_affected": "1.2.4"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.2.4"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.2.0",
            "1.2.1",
            "1.2.2",
            "1.2.3",
            "1.2.4",
            "sdk==0.4.2",
            "sdk==0.4.1",
            "sdk==0.4.0",
            "cli==0.4.27",
            "sdk==0.3.15",
            "checkpoint==4.1.1",
            "prebuilt==1.1.0",
            "checkpointsqlite==3.1.0",
            "checkpointpostgres==3.1.0",
            "checkpoint==4.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-14742.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:33.090111970Z",
      "provider": "osv",
      "references": [
        "https://github.com/langchain-ai/langgraph/",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/14xxx/CVE-2026-14742.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-14742",
        "https://vuldb.com/cve/CVE-2026-14742",
        "https://vuldb.com/submit/849217",
        "https://vuldb.com/vuln/376328",
        "https://github.com/langchain-ai/langgraph/issues/8009",
        "https://vuldb.com/vuln/376328/cti",
        "https://github.com/langchain-ai/langgraph/pull/8069"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-327",
          "CWE-328"
        ],
        "cna_assigner": "VulDB",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/14xxx/CVE-2026-14742.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-14742",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 500229,
  "published_at": "2026-07-05T10:45:09.243+00:00"
}