bolo-solo SnakeYAML BackupService.java importMarkdownsSync deserialization

{
  "id": "0abe4a71570786c581dafe490f8ba35ac8b8405d7d5604c242cce83587455930",
  "url": "https://osv.dev/vulnerability/CVE-2026-1691",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "bolo-solo SnakeYAML BackupService.java importMarkdownsSync deserialization",
    "summary": "A vulnerability has been found in bolo-solo up to 2.6.4. This impacts the function importMarkdownsSync of the file src/main/java/org/b3log/solo/bolo/prop/BackupService.java of the component SnakeYAML. Such manipulation leads to deserialization. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.",
    "evidence": "osv:CVE-2026-1691",
    "products": [],
    "severity": "low",
    "structured": {
      "id": "CVE-2026-1691",
      "aliases": [
        "CVE-2026-1691"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/bolo-blog/bolo-solo",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0bc4fc647a875914d25abd4b05bd854bba5e88d1"
                },
                {
                  "last_affected": "e0ab6b1f57a4ba66b4a42a7b6ceafb87c33290cc"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "2.6.1"
                      },
                      {
                        "last_affected": "2.6.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "introduced": "2.6.2"
                      },
                      {
                        "last_affected": "2.6.2"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "introduced": "2.6.3"
                      },
                      {
                        "last_affected": "2.6.3"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "introduced": "2.6.4"
                      },
                      {
                        "last_affected": "2.6.4"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "cpe": "cpe:2.3:a:adlered:bolo-solo:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "2.6.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.6.1",
            "2.6.2",
            "2.6.3",
            "2.6.4",
            "v2.6.4_stable",
            "v2.6.3_stable",
            "v2.6.2_stable",
            "v2.6.1_stable"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-1691.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:36.814536165Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/1xxx/CVE-2026-1691.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-1691",
        "https://vuldb.com/?id.343485",
        "https://vuldb.com/?submit.741899",
        "https://github.com/bolo-blog/bolo-solo/issues/325",
        "https://github.com/bolo-blog/bolo-solo/issues/325#issue-3828755519",
        "https://vuldb.com/?ctiid.343485"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-20",
          "CWE-502"
        ],
        "cna_assigner": "VulDB",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "2.6.0"
                  },
                  {
                    "last_affected": "2.6.0"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandaloneSingleVersion"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/1xxx/CVE-2026-1691.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-1691",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 504244,
  "published_at": "2026-01-30T17:02:06.205+00:00"
}