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knowns through 0.33.0 Path Traversal via Template Engine

Type: advisorySources: OSV

knowns through 0.33.0 fails to properly validate template destination paths in the code generation template engine, allowing attackers to read and write arbitrary files outside the project root. Attackers can supply malicious templates that traverse directories to overwrite shell profiles, steal credentials, or achieve persistent code execution on victim systems.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-88937
Confirmed fixed CVEs
Not specified
Updated in this feed
7 Nov 2026, 04:05 UTC · Revision 1

Source evidence

knowns through 0.33.0 Path Traversal via Template Engine

core-osv · Original source

Published 10 Sept 2026, 15:28 UTC

knowns through 0.33.0 fails to properly validate template destination paths in the code generation template engine, allowing attackers to read and write arbitrary files outside the project root. Attackers can supply malicious templates that traverse directories to overwrite shell profiles, steal credentials, or achieve persistent code execution on victim systems.

osv:CVE-2026-88937
Complete source record
{
  "id": "007318520382609951357a7f71a874063def78dd6554b2f63bef1db05462fc4b",
  "url": "https://osv.dev/vulnerability/CVE-2026-88937",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "knowns through 0.33.0 Path Traversal via Template Engine",
    "summary": "knowns through 0.33.0 fails to properly validate template destination paths in the code generation template engine, allowing attackers to read and write arbitrary files outside the project root. Attackers can supply malicious templates that traverse directories to overwrite shell profiles, steal credentials, or achieve persistent code execution on victim systems.",
    "evidence": "osv:CVE-2026-88937",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-88937",
      "aliases": [
        "CVE-2026-88937"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/knowns-dev/knowns",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "c6ed4cb8548c266930910d3b24b7605fa2c21150"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.33.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.33.0"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.33.0",
            "v0.32.0",
            "v0.31.0",
            "v0.30.0",
            "v0.29.1",
            "v0.29.0",
            "v0.28.0",
            "v0.27.1",
            "v0.27.0",
            "v0.23.0",
            "v0.26.0",
            "v0.25.0",
            "v0.24.1",
            "v0.24.0",
            "v0.22.2",
            "v0.22.1",
            "v0.22.0",
            "v0.21.0",
            "v0.20.5",
            "v0.20.4",
            "v0.20.3",
            "v0.20.2",
            "v0.20.1",
            "v0.20.0",
            "v0.19.2",
            "v0.19.1",
            "v0.19.0",
            "v0.18.4",
            "v0.18.3",
            "v0.18.2",
            "v0.18.1",
            "v0.18.0",
            "v0.17.1",
            "v0.17.0",
            "v0.16.3",
            "v0.16.2",
            "v0.16.1",
            "v0.16.0",
            "v0.15.3",
            "v0.15.2",
            "v0.15.1",
            "v0.15.0",
            "v0.12.4",
            "v0.12.3",
            "v0.12.2",
            "v0.12.1",
            "v0.12.0",
            "v0.11.4",
            "v0.11.3",
            "v0.11.2",
            "v0.11.1",
            "v0.11.0",
            "v0.10.6",
            "v0.10.5",
            "v0.10.4",
            "v0.10.3",
            "v0.10.2",
            "v0.10.1",
            "v0.10.0",
            "v0.9.0",
            "v0.8.9",
            "v0.8.8",
            "v0.8.7",
            "v0.8.6",
            "v0.8.5",
            "v0.8.4",
            "v0.8.3",
            "v0.8.2",
            "v0.8.1",
            "v0.8.0",
            "v0.7.0",
            "v0.6.0",
            "v0.5.0",
            "v0.4.0",
            "v0.3.1",
            "v0.3.0",
            "v0.2.1",
            "v0.2.0",
            "v0.1.8",
            "v0.1.7",
            "v0.1.6",
            "v0.1.5",
            "v0.1.4",
            "v0.1.3",
            "v0.1.2",
            "v0.1.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-88937.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:49.659841589Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/88xxx/CVE-2026-88937.json",
        "https://github.com/knowns-dev/knowns/security/advisories/GHSA-68cq-4rwm-f7jr",
        "https://github.com/knowns-dev/knowns/security/advisories/GHSA-xjcg-5j3r-m6f9",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-88937",
        "https://www.vulncheck.com/advisories/knowns-through-0.33.0-path-traversal-via-template-engine",
        "https://github.com/knowns-dev/knowns/blob/v0.33.0/internal/codegen/template_engine.go#L318-L344",
        "https://github.com/knowns-dev/knowns/blob/v0.33.0/internal/codegen/template_engine.go#L625-L636"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-22"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/88xxx/CVE-2026-88937.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-88937",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 517990,
  "published_at": "2026-09-10T15:28:52.507+00:00"
}