{"id":"CVE-2026-22871","aliases":["EUVD-2026-2012","GHSA-xg9w-vg3g-6m68","PYSEC-2026-1430"],"status":"published","title":"GuardDog Path Traversal Vulnerability Leads to Arbitrary File Overwrite and RCE","description":"GuardDog is a CLI tool to identify malicious PyPI packages. Prior to 2.7.1, there is a path traversal vulnerability exists in GuardDog's safe_extract() function that allows malicious PyPI packages to write arbitrary files outside the intended extraction directory, leading to Arbitrary File Overwrite and Remote Code Execution on systems running GuardDog. This vulnerability is fixed in 2.7.1.","severity":{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.01064,"percentile":0.64924,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-22"],"published":"2026-01-13T20:46:57Z","modified":"2026-10-28T02:31:14Z","fixes":[{"ecosystem":"PyPI","package":"guarddog","fixed_in":["2.7.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"PyPI","package":"guarddog","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.1"}]}]},{"source":"osv","ecosystem":"PyPI","package":"guarddog","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.1"}]}],"versions":["0.1.1","0.1.10","0.1.3","0.1.4","0.1.5","0.1.6","0.1.7","0.1.8","0.1.9","1.0.0","1.0.1","1.0.2","1.1.0","1.1.1","1.1.2","1.1.3","1.1.4","1.10.0","1.10.1","1.11.0","1.11.1","1.11.2","1.2","1.2.1","1.3.0","1.4.0","1.5.0","1.5.1","1.5.2","1.5.3","1.5.4","1.5.5","1.5.6","1.5.7","1.5.8","1.6.0","1.7.0","1.8.0","1.8.1","1.8.2","1.9.0","2.0.0","2.0.1","2.0.2","2.0.3","2.0.4","2.0.5","2.0.6","2.1.0","2.2.0","2.3.0","2.4.0","2.5.0","2.6.0","2.7.0"]},{"source":"osv","ecosystem":"PyPI","package":"guarddog","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.1"}]}],"versions":["0.1.1","0.1.10","0.1.3","0.1.4","0.1.5","0.1.6","0.1.7","0.1.8","0.1.9","1.0.0","1.0.1","1.0.2","1.1.0","1.1.1","1.1.2","1.1.3","1.1.4","1.10.0","1.10.1","1.11.0","1.11.1","1.11.2","1.2","1.2.1","1.3.0","1.4.0","1.5.0","1.5.1","1.5.2","1.5.3","1.5.4","1.5.5","1.5.6","1.5.7","1.5.8","1.6.0","1.7.0","1.8.0","1.8.1","1.8.2","1.9.0","2.0.0","2.0.1","2.0.2","2.0.3","2.0.4","2.0.5","2.0.6","2.1.0","2.2.0","2.3.0","2.4.0","2.5.0","2.6.0","2.7.0"]}],"products":[{"vendor":"datadog","product":"guarddog"},{"vendor":"datadoghq","product":"guarddog"}],"references":[{"url":"https://github.com/DataDog/guarddog/security/advisories/GHSA-xg9w-vg3g-6m68","tags":["x_refsource_CONFIRM","Third Party Advisory","advisory","web"]},{"url":"https://github.com/DataDog/guarddog/commit/9aa6a725b2c71d537d3c18d1c15621395ebb879c","tags":["x_refsource_MISC","Patch","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-22871","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-xg9w-vg3g-6m68","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/22xxx/CVE-2026-22871.json","tags":["advisory"]},{"url":"https://github.com/DataDog/guarddog","tags":["package"]},{"url":"https://pypi.org/project/guarddog","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-22871","title":"GuardDog Path Traversal Vulnerability Leads to Arbitrary File Overwrite and RCE","description":"GuardDog is a CLI tool to identify malicious PyPI packages. Prior to 2.7.1, there is a path traversal vulnerability exists in GuardDog's safe_extract() function that allows malicious PyPI packages to write arbitrary files outside the intended extraction directory, leading to Arbitrary File Overwrite and Remote Code Execution on systems running GuardDog. This vulnerability is fixed in 2.7.1.","status":"published","published":"2026-01-13T20:46:57.324Z","modified":"2026-01-13T21:24:07.742Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T13:39:05.585774Z"}],"euvd":[{"id":"EUVD-2026-2012","description":"GuardDog is a CLI tool to identify malicious PyPI packages. Prior to 2.7.1, there is a path traversal vulnerability exists in GuardDog's safe_extract() function that allows malicious PyPI packages to write arbitrary files outside the intended extraction directory, leading to Arbitrary File Overwrite and Remote Code Execution on systems running GuardDog. This vulnerability is fixed in 2.7.1.","status":"published","published":"2026-01-13T20:46:57Z","modified":"2026-01-13T21:24:07Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T19:48:52.227329Z"}],"ghsa":[{"id":"GHSA-xg9w-vg3g-6m68","title":"GuardDog Path Traversal Vulnerability Leads to Arbitrary File Overwrite and RCE","description":"## Summary\n\nA **path traversal vulnerability** exists in GuardDog's `safe_extract()` function that allows malicious PyPI packages to write arbitrary files outside the intended extraction directory, leading to **Arbitrary File Overwrite** and **Remote Code Execution** on systems running GuardDog.\n\n**CWE:** CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)\n\n## Details\n\n### Vulnerable Code\n\n**File:** `guarddog/utils/archives.py`\n\n```python\nelif zipfile.is_zipfile(source_archive):\n    with zipfile.ZipFile(source_archive, \"r\") as zip:\n        for file in zip.namelist():\n            # Note: zip.extract cleans up any malicious file name\n            # such as directory traversal attempts This is not the\n            # case of zipfile.extractall\n            zip.extract(file, path=os.path.join(target_directory, file))  # ❌ VULNERABLE\n```\n\n### Root Cause\n\nThe comment about `zip.extract()` fooled me at first :) then I noticed the `os.path.join()` call. \nThe vulnerability stems from **incorrect usage of Python's `zipfile.ZipFile.extract()` API**:\n\n- The `path` parameter should be the **target directory**, not a full file path\n- `extract()` automatically appends the member name to the path\n- By passing `os.path.join(target_directory, file)`, GuardDog causes the filename to be appended **twice**\n- This breaks zipfile's built-in path traversal sanitization\n\n### Attack Vector\n\n1. Attacker creates malicious wheel with path traversal filenames\n2. Uploads to PyPI or distributes directly\n3. Package scan: `guarddog pypi scan malicious-pkg`\n4. GuardDog downloads and extracts the package\n5. Malicious files written to arbitrary locations\n6. Code execution could be achieved\n\n## Impact\n\nImpact depends on how GuardDog is running and under which environment.\n\n### Critical Scenarios\n\n1. **Immediate Code Execution**\n   - Write to `~/.bashrc` → executes on next shell\n   - Write to `~/.profile` → executes on login\n\n2. **Persistent Backdoors**\n   - Write to `~/.ssh/authorized_keys` → SSH access\n   - Write to `/etc/cron.d/malicious` → scheduled execution (if root)\n   - Write to systemd user services → persistent execution\n\nand more...\n\n## Credits\n\n**Reported by:** Charbel (dwbruijn)","status":"published","published":"2026-01-13T21:54:49Z","modified":"2026-01-13T21:54:50Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:39:17.333958Z"}],"nvd":[{"id":"CVE-2026-22871","description":"GuardDog is a CLI tool to identify malicious PyPI packages. Prior to 2.7.1, there is a path traversal vulnerability exists in GuardDog's safe_extract() function that allows malicious PyPI packages to write arbitrary files outside the intended extraction directory, leading to Arbitrary File Overwrite and Remote Code Execution on systems running GuardDog. This vulnerability is fixed in 2.7.1.","status":"published","published":"2026-01-13T21:15:55.21Z","modified":"2026-06-17T10:20:32.513Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:12:04.066712Z"}],"osv":[{"id":"CVE-2026-22871","title":"GuardDog Path Traversal Vulnerability Leads to Arbitrary File Overwrite and RCE","description":"GuardDog is a CLI tool to identify malicious PyPI packages. Prior to 2.7.1, there is a path traversal vulnerability exists in GuardDog's safe_extract() function that allows malicious PyPI packages to write arbitrary files outside the intended extraction directory, leading to Arbitrary File Overwrite and Remote Code Execution on systems running GuardDog. This vulnerability is fixed in 2.7.1.","status":"published","published":"2026-01-13T20:46:57.324Z","modified":"2026-10-28T02:31:14.285976971Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T15:44:58.749922Z"},{"id":"GHSA-xg9w-vg3g-6m68","title":"GuardDog Path Traversal Vulnerability Leads to Arbitrary File Overwrite and RCE","description":"## Summary\n\nA **path traversal vulnerability** exists in GuardDog's `safe_extract()` function that allows malicious PyPI packages to write arbitrary files outside the intended extraction directory, leading to **Arbitrary File Overwrite** and **Remote Code Execution** on systems running GuardDog.\n\n**CWE:** CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)\n\n## Details\n\n### Vulnerable Code\n\n**File:** `guarddog/utils/archives.py`\n\n```python\nelif zipfile.is_zipfile(source_archive):\n    with zipfile.ZipFile(source_archive, \"r\") as zip:\n        for file in zip.namelist():\n            # Note: zip.extract cleans up any malicious file name\n            # such as directory traversal attempts This is not the\n            # case of zipfile.extractall\n            zip.extract(file, path=os.path.join(target_directory, file))  # ❌ VULNERABLE\n```\n\n### Root Cause\n\nThe comment about `zip.extract()` fooled me at first :) then I noticed the `os.path.join()` call. \nThe vulnerability stems from **incorrect usage of Python's `zipfile.ZipFile.extract()` API**:\n\n- The `path` parameter should be the **target directory**, not a full file path\n- `extract()` automatically appends the member name to the path\n- By passing `os.path.join(target_directory, file)`, GuardDog causes the filename to be appended **twice**\n- This breaks zipfile's built-in path traversal sanitization\n\n### Attack Vector\n\n1. Attacker creates malicious wheel with path traversal filenames\n2. Uploads to PyPI or distributes directly\n3. Package scan: `guarddog pypi scan malicious-pkg`\n4. GuardDog downloads and extracts the package\n5. Malicious files written to arbitrary locations\n6. Code execution could be achieved\n\n## Impact\n\nImpact depends on how GuardDog is running and under which environment.\n\n### Critical Scenarios\n\n1. **Immediate Code Execution**\n   - Write to `~/.bashrc` → executes on next shell\n   - Write to `~/.profile` → executes on login\n\n2. **Persistent Backdoors**\n   - Write to `~/.ssh/authorized_keys` → SSH access\n   - Write to `/etc/cron.d/malicious` → scheduled execution (if root)\n   - Write to systemd user services → persistent execution\n\nand more...\n\n## Credits\n\n**Reported by:** Charbel (dwbruijn)","status":"published","published":"2026-01-13T21:54:49Z","modified":"2026-07-07T17:57:32.657033107Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T15:46:59.835583Z"},{"id":"PYSEC-2026-1430","title":"GuardDog Path Traversal Vulnerability Leads to Arbitrary File Overwrite and RCE","description":"## Summary\n\nA **path traversal vulnerability** exists in GuardDog's `safe_extract()` function that allows malicious PyPI packages to write arbitrary files outside the intended extraction directory, leading to **Arbitrary File Overwrite** and **Remote Code Execution** on systems running GuardDog.\n\n**CWE:** CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)\n\n## Details\n\n### Vulnerable Code\n\n**File:** `guarddog/utils/archives.py`\n\n```python\nelif zipfile.is_zipfile(source_archive):\n    with zipfile.ZipFile(source_archive, \"r\") as zip:\n        for file in zip.namelist():\n            # Note: zip.extract cleans up any malicious file name\n            # such as directory traversal attempts This is not the\n            # case of zipfile.extractall\n            zip.extract(file, path=os.path.join(target_directory, file))  # ❌ VULNERABLE\n```\n\n### Root Cause\n\nThe comment about `zip.extract()` fooled me at first :) then I noticed the `os.path.join()` call. \nThe vulnerability stems from **incorrect usage of Python's `zipfile.ZipFile.extract()` API**:\n\n- The `path` parameter should be the **target directory**, not a full file path\n- `extract()` automatically appends the member name to the path\n- By passing `os.path.join(target_directory, file)`, GuardDog causes the filename to be appended **twice**\n- This breaks zipfile's built-in path traversal sanitization\n\n### Attack Vector\n\n1. Attacker creates malicious wheel with path traversal filenames\n2. Uploads to PyPI or distributes directly\n3. Package scan: `guarddog pypi scan malicious-pkg`\n4. GuardDog downloads and extracts the package\n5. Malicious files written to arbitrary locations\n6. Code execution could be achieved\n\n## Impact\n\nImpact depends on how GuardDog is running and under which environment.\n\n### Critical Scenarios\n\n1. **Immediate Code Execution**\n   - Write to `~/.bashrc` → executes on next shell\n   - Write to `~/.profile` → executes on login\n\n2. **Persistent Backdoors**\n   - Write to `~/.ssh/authorized_keys` → SSH access\n   - Write to `/etc/cron.d/malicious` → scheduled execution (if root)\n   - Write to systemd user services → persistent execution\n\nand more...\n\n## Credits\n\n**Reported by:** Charbel (dwbruijn)","status":"published","published":"2026-07-07T16:03:18.620405Z","modified":"2026-07-07T17:47:38.87104018Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T15:52:54.622769Z"}]}}