Vulnerability-Lookup

CVE-2026-22870 (GCVE-0-2026-22870)

Vulnerability from cvelistv5 – Published: 2026-01-13 20:43 – Updated: 2026-01-13 21:23

Title

GuardDog Zip Bomb Vulnerability in safe_extract() Allows DoS

Summary

GuardDog is a CLI tool to identify malicious PyPI packages. Prior to 2.7.1, GuardDog's safe_extract() function does not validate decompressed file sizes when extracting ZIP archives (wheels, eggs), allowing attackers to cause denial of service through zip bombs. A malicious package can consume gigabytes of disk space from a few megabytes of compressed data. This vulnerability is fixed in 2.7.1.

Severity ?

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CWE

CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)

Assigner

GitHub_M

References

URL

Tags

	https://github.com/DataDog/guarddog/security/advi…	x_refsource_CONFIRM
	https://github.com/DataDog/guarddog/commit/c3fb07…	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-2026-22870

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

Severity ?

7.1 (High) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/DataDog/guarddog/commit/c3fb07b4838945f42497e78b7a02bcfb1e63969b
	security-advisories@github.com	https://github.com/DataDog/guarddog/security/advisories/GHSA-ffj4-jq7m-9g6v

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, GuardDog\u0027s safe_extract() function does not validate decompressed file sizes when extracting ZIP archives (wheels, eggs), allowing attackers to cause denial of service through zip bombs. A malicious package can consume gigabytes of disk space from a few megabytes of compressed data. This vulnerability is fixed in 2.7.1."
    }
  ],
  "id": "CVE-2026-22870",
  "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": 7.1,
          "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",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "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:N/VI:N/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": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-01-13T21:15:55.067",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/DataDog/guarddog/commit/c3fb07b4838945f42497e78b7a02bcfb1e63969b"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/DataDog/guarddog/security/advisories/GHSA-ffj4-jq7m-9g6v"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
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        {
          "lang": "en",
          "value": "CWE-409"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}

GHSA-FFJ4-JQ7M-9G6V

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

Summary

GuardDog Zip Bomb Vulnerability in safe_extract() Allows DoS

Details

Summary

GuardDog's safe_extract() function does not validate decompressed file sizes when extracting ZIP archives (wheels, eggs), allowing attackers to cause denial of service through zip bombs. A malicious package can consume gigabytes of disk space from a few megabytes of compressed data.

Vulnerability Details

Affected Component: guarddog/utils/archives.py - safe_extract() function
Vulnerability Type: CWE-409 - Improper Handling of Highly Compressed Data (Zip Bomb)
Severity: HIGH (CVSS ~8)
Attack Vector: Network (malicious package uploaded to PyPI/npm) or local

Root Cause

The safe_extract() function handles TAR files securely using the tarsafe library, but ZIP file extraction has no size validation:

elif zipfile.is_zipfile(source_archive):
    with zipfile.ZipFile(source_archive, "r") as zip:
        for file in zip.namelist():
            zip.extract(file, path=os.path.join(target_directory, file))

Missing protections: - ❌ No decompressed size limit - ❌ No compression ratio validation
- ❌ No file count limits - ❌ No total extracted size validation

Impact

Denial of Service Scenarios

1. CI/CD Pipeline Disruption - Attacker publishes malicious package to PyPI - Developer adds package to requirements.txt - CI/CD runs GuardDog scan - Disk fills (GitHub Actions: standard 14GB limit) - All deployments blocked

2. Resource Exhaustion - Local development environments - Security scanning infrastructure
- Automated scanning systems - Docker containers with limited disk

3. Supply Chain Attack Amplification - Single malicious package blocks security scanning - Prevents detection of other malicious packages - Forces manual intervention - Increases security team workload

Recommended Fix

Add size validation for ZIP files similar to what tarsafe provides for TAR files

Configuration Options

Make limits configurable via environment variables or config file

Additional Improvements

Add warning logs when archives approach limits
Provide clear error messages for users
Document limits in user-facing documentation
Add tests for zip bomb detection
Consider using a safe ZIP library (similar to tarsafe)

Credit

Reported by: Charbel (dwbruijn)

Severity ?

7.1 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/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-2026-22870"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-409"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-01-13T21:54:41Z",
    "nvd_published_at": "2026-01-13T21:15:55Z",
    "severity": "HIGH"
  },
  "details": "## Summary\n\nGuardDog\u0027s `safe_extract()` function does not validate decompressed file sizes when extracting ZIP archives (wheels, eggs), allowing attackers to cause denial of service through zip bombs. A malicious package can consume gigabytes of disk space from a few megabytes of compressed data.\n\n## Vulnerability Details\n\n**Affected Component:** `guarddog/utils/archives.py` - `safe_extract()` function  \n**Vulnerability Type:** CWE-409 - Improper Handling of Highly Compressed Data (Zip Bomb)  \n**Severity:** HIGH (CVSS ~8)  \n**Attack Vector:** Network (malicious package uploaded to PyPI/npm) or local\n\n### Root Cause\n\nThe `safe_extract()` function handles TAR files securely using the `tarsafe` library, but ZIP file extraction has no size validation:\n```python\nelif zipfile.is_zipfile(source_archive):\n    with zipfile.ZipFile(source_archive, \"r\") as zip:\n        for file in zip.namelist():\n            zip.extract(file, path=os.path.join(target_directory, file))\n```\n\n**Missing protections:**\n- \u274c No decompressed size limit\n- \u274c No compression ratio validation  \n- \u274c No file count limits\n- \u274c No total extracted size validation\n\n## Impact\n\n### Denial of Service Scenarios\n\n**1. CI/CD Pipeline Disruption**\n- Attacker publishes malicious package to PyPI\n- Developer adds package to requirements.txt\n- CI/CD runs GuardDog scan\n- Disk fills (GitHub Actions: standard 14GB limit)\n- All deployments blocked\n\n**2. Resource Exhaustion**\n- Local development environments\n- Security scanning infrastructure  \n- Automated scanning systems\n- Docker containers with limited disk\n\n**3. Supply Chain Attack Amplification**\n- Single malicious package blocks security scanning\n- Prevents detection of other malicious packages\n- Forces manual intervention\n- Increases security team workload\n\n## Recommended Fix\n\nAdd size validation for ZIP files similar to what `tarsafe` provides for TAR files\n\n### Configuration Options\n\nMake limits configurable via environment variables or config file\n\n## Additional Improvements\n\n1. **Add warning logs** when archives approach limits\n2. **Provide clear error messages** for users\n3. **Document limits** in user-facing documentation\n4. **Add tests** for zip bomb detection\n5. **Consider using a safe ZIP library** (similar to tarsafe)\n\n## Credit\n\nReported by: Charbel (dwbruijn)",
  "id": "GHSA-ffj4-jq7m-9g6v",
  "modified": "2026-01-13T21:54:42Z",
  "published": "2026-01-13T21:54:41Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/DataDog/guarddog/security/advisories/GHSA-ffj4-jq7m-9g6v"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-22870"
    },
    {
      "type": "WEB",
      "url": "https://github.com/DataDog/guarddog/commit/c3fb07b4838945f42497e78b7a02bcfb1e63969b"
    },
    {
      "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:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "GuardDog Zip Bomb Vulnerability in safe_extract() Allows DoS"
}

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-2026-22870 (GCVE-0-2026-22870)

FKIE_CVE-2026-22870

GHSA-FFJ4-JQ7M-9G6V

Summary

Vulnerability Details

Root Cause

Impact

Denial of Service Scenarios

Recommended Fix

Configuration Options

Additional Improvements

Credit

Tags

Sightings

Nomenclature