Vulnerability-Lookup

CVE-2026-22871 (GCVE-0-2026-22871)

Vulnerability from cvelistv5 – Published: 2026-01-13 20:46 – Updated: 2026-01-13 21:24

Title

GuardDog Path Traversal Vulnerability Leads to Arbitrary File Overwrite and RCE

Summary

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 ?

8.7 (High)


                        
                          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

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Assigner

GitHub_M

References

URL

Tags

	https://github.com/DataDog/guarddog/security/advi…	x_refsource_CONFIRM
	https://github.com/DataDog/guarddog/commit/9aa6a7…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	DataDog	guarddog	Affected: < 2.7.1

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-22871

Vulnerability from fkie_nvd - Published: 2026-01-13 21:15 - Updated: 2026-01-14 16:25

Severity ?

8.7 (High) - 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

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/DataDog/guarddog/commit/9aa6a725b2c71d537d3c18d1c15621395ebb879c
	security-advisories@github.com	https://github.com/DataDog/guarddog/security/advisories/GHSA-xg9w-vg3g-6m68

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "GuardDog is a CLI tool to identify malicious PyPI packages. Prior to 2.7.1, there is a path traversal vulnerability exists in GuardDog\u0027s 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."
    }
  ],
  "id": "CVE-2026-22871",
  "lastModified": "2026-01-14T16:25:40.430",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 8.7,
          "baseSeverity": "HIGH",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
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          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "PASSIVE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "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",
          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
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  "published": "2026-01-13T21:15:55.210",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/DataDog/guarddog/commit/9aa6a725b2c71d537d3c18d1c15621395ebb879c"
    },
    {
      "source": "security-advisories@github.com",
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    }
  ],
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  "vulnStatus": "Awaiting Analysis",
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      "description": [
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          "lang": "en",
          "value": "CWE-22"
        }
      ],
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      "type": "Primary"
    }
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}

GHSA-XG9W-VG3G-6M68

Vulnerability from github – Published: 2026-01-13 21:54 – Updated: 2026-01-13 21:54

Summary

GuardDog Path Traversal Vulnerability Leads to Arbitrary File Overwrite and RCE

Details

Summary

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.

CWE: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

Details

Vulnerable Code

File: guarddog/utils/archives.py

elif zipfile.is_zipfile(source_archive):
    with zipfile.ZipFile(source_archive, "r") as zip:
        for file in zip.namelist():
            # Note: zip.extract cleans up any malicious file name
            # such as directory traversal attempts This is not the
            # case of zipfile.extractall
            zip.extract(file, path=os.path.join(target_directory, file))  # ❌ VULNERABLE

Root Cause

The comment about zip.extract() fooled me at first :) then I noticed the os.path.join() call. The vulnerability stems from incorrect usage of Python's zipfile.ZipFile.extract() API:

The path parameter should be the target directory, not a full file path
extract() automatically appends the member name to the path
By passing os.path.join(target_directory, file), GuardDog causes the filename to be appended twice
This breaks zipfile's built-in path traversal sanitization

Attack Vector

Attacker creates malicious wheel with path traversal filenames
Uploads to PyPI or distributes directly
Package scan: guarddog pypi scan malicious-pkg
GuardDog downloads and extracts the package
Malicious files written to arbitrary locations
Code execution could be achieved

Impact

Impact depends on how GuardDog is running and under which environment.

Critical Scenarios

Immediate Code Execution
Write to ~/.bashrc → executes on next shell
Write to ~/.profile → executes on login
Persistent Backdoors
Write to ~/.ssh/authorized_keys → SSH access
Write to /etc/cron.d/malicious → scheduled execution (if root)
Write to systemd user services → persistent execution

and more...

Credits

Reported by: Charbel (dwbruijn)

Severity ?

8.7 (High)


                  
                    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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "guarddog"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.7.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-22871"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-01-13T21:54:49Z",
    "nvd_published_at": "2026-01-13T21:15:55Z",
    "severity": "HIGH"
  },
  "details": "## Summary\n\nA **path traversal vulnerability** exists in GuardDog\u0027s `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))  # \u274c 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\u0027s `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\u0027s 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` \u2192 executes on next shell\n   - Write to `~/.profile` \u2192 executes on login\n\n2. **Persistent Backdoors**\n   - Write to `~/.ssh/authorized_keys` \u2192 SSH access\n   - Write to `/etc/cron.d/malicious` \u2192 scheduled execution (if root)\n   - Write to systemd user services \u2192 persistent execution\n\nand more...\n\n## Credits\n\n**Reported by:** Charbel (dwbruijn)",
  "id": "GHSA-xg9w-vg3g-6m68",
  "modified": "2026-01-13T21:54:49Z",
  "published": "2026-01-13T21:54:49Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/DataDog/guarddog/security/advisories/GHSA-xg9w-vg3g-6m68"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-22871"
    },
    {
      "type": "WEB",
      "url": "https://github.com/DataDog/guarddog/commit/9aa6a725b2c71d537d3c18d1c15621395ebb879c"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/DataDog/guarddog"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "GuardDog Path Traversal Vulnerability Leads to Arbitrary File Overwrite and RCE"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-22871 (GCVE-0-2026-22871)

FKIE_CVE-2026-22871

GHSA-XG9W-VG3G-6M68

Summary

Details

Vulnerable Code

Root Cause

Attack Vector

Impact

Critical Scenarios

Credits

Tags

Sightings

Nomenclature