GHSA-M5P4-GVPX-4MVR

Vulnerability from github – Published: 2026-05-11 14:43 – Updated: 2026-05-11 14:43

Summary

GuardDog: Unsanitized human-readable scan output allows terminal escape injection from malicious package content

Details

Summary

GuardDog includes attacker-controlled filenames, file locations, messages, and code snippets in its default human-readable output without escaping terminal control characters. A malicious package can therefore inject ANSI or OSC escape sequences into analyst terminals or CI logs.

Description

The finding formatter stores file paths and snippets from scanned content:

location = file_path + ":" + str(start_line)
finding = {
    "location": location,
    "code": code,
    "message": result["extra"]["message"],
}

The human-readable reporter later prints these values directly:

"  * " + finding["message"] + " at " + finding["location"] + "\n    " + _format_code_line_for_output(finding["code"])

No escaping is applied for control characters such as \x1b. A malicious package can therefore ship a filename like:

evil\x1b[2J.py

or matched source lines containing terminal escapes, which survive into the final CLI output.

Reproduction summary

Create a file whose name contains \x1b[2J.
Feed a semgrep-style result referencing that file into Analyzer._format_semgrep_response().
Render the result with HumanReadableReporter.print_scan_results().
The output string contains the raw escape bytes, which a terminal may interpret.

Key code paths

guarddog/analyzer/analyzer.py:377-392
guarddog/reporters/human_readable.py:36-42
guarddog/reporters/human_readable.py:84-91

Practical impact

This can be used to: - clear or rewrite analyst terminal output - inject misleading or spoofed log content in CI - emit clickable OSC 8 hyperlinks or title changes in compatible terminals

Prior public disclosure check

As of 2026-03-18, no matching public GitHub advisory, CVE, or public repo issue was found for this specific bug.

Suggested fix

Escape or strip terminal control characters before rendering any attacker-controlled value in human-readable output. This should cover package names, file paths, messages, and code snippets.

Severity

5.0 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "guarddog"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.0"
            },
            {
              "last_affected": "2.9.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-44972"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-116"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-11T14:43:43Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "# Summary\nGuardDog includes attacker-controlled filenames, file locations, messages, and code snippets in its default human-readable output without escaping terminal control characters. A malicious package can therefore inject ANSI or OSC escape sequences into analyst terminals or CI logs.\n\n# Description\nThe finding formatter stores file paths and snippets from scanned content:\n\n```python\nlocation = file_path + \":\" + str(start_line)\nfinding = {\n    \"location\": location,\n    \"code\": code,\n    \"message\": result[\"extra\"][\"message\"],\n}\n```\n\nThe human-readable reporter later prints these values directly:\n\n```python\n\"  * \" + finding[\"message\"] + \" at \" + finding[\"location\"] + \"\\n    \" + _format_code_line_for_output(finding[\"code\"])\n```\n\nNo escaping is applied for control characters such as `\\x1b`. A malicious package can therefore ship a filename like:\n\n```text\nevil\\x1b[2J.py\n```\n\nor matched source lines containing terminal escapes, which survive into the final CLI output.\n\n# Reproduction summary\n1. Create a file whose name contains `\\x1b[2J`.\n2. Feed a semgrep-style result referencing that file into `Analyzer._format_semgrep_response()`.\n3. Render the result with `HumanReadableReporter.print_scan_results()`.\n4. The output string contains the raw escape bytes, which a terminal may interpret.\n\n# Key code paths\n- `guarddog/analyzer/analyzer.py:377-392`\n- `guarddog/reporters/human_readable.py:36-42`\n- `guarddog/reporters/human_readable.py:84-91`\n\n# Practical impact\nThis can be used to:\n- clear or rewrite analyst terminal output\n- inject misleading or spoofed log content in CI\n- emit clickable OSC 8 hyperlinks or title changes in compatible terminals\n\n# Prior public disclosure check\nAs of 2026-03-18, no matching public GitHub advisory, CVE, or public repo issue was found for this specific bug.\n\n# Suggested fix\nEscape or strip terminal control characters before rendering any attacker-controlled value in human-readable output. This should cover package names, file paths, messages, and code snippets.",
  "id": "GHSA-m5p4-gvpx-4mvr",
  "modified": "2026-05-11T14:43:43Z",
  "published": "2026-05-11T14:43:43Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/DataDog/guarddog/security/advisories/GHSA-m5p4-gvpx-4mvr"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/DataDog/guarddog"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "GuardDog: Unsanitized human-readable scan output allows terminal escape injection from malicious package content"
}

CVE-2026-44972 (GCVE-0-2026-44972)

Vulnerability from cvelistv5 – Published: 2026-05-27 14:42 – Updated: 2026-05-27 15:34

Title

GuardDog: Unsanitized human-readable scan output allows terminal escape injection from malicious package content

Summary

GuardDog is a CLI tool to identify malicious PyPI packages. From 2.6.0 to 2.9.0, GuardDog includes attacker-controlled filenames, file locations, messages, and code snippets in its default human-readable output without escaping terminal control characters. A malicious package can therefore inject ANSI or OSC escape sequences into analyst terminals or CI logs.

Severity

5 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-116 - Improper Encoding or Escaping of Output

Assigner

GitHub_M

References

1 reference

URL	Tags
https://github.com/DataDog/guarddog/security/advi…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
DataDog	guarddog	Affected: >= 2.6.0, <= 2.9.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-44972",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-27T15:34:24.334334Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-27T15:34:32.271Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "guarddog",
          "vendor": "DataDog",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 2.6.0, \u003c= 2.9.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "GuardDog is a CLI tool to identify malicious PyPI packages. From 2.6.0 to 2.9.0, GuardDog includes attacker-controlled filenames, file locations, messages, and code snippets in its default human-readable output without escaping terminal control characters. A malicious package can therefore inject ANSI or OSC escape sequences into analyst terminals or CI logs."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-116",
              "description": "CWE-116: Improper Encoding or Escaping of Output",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-27T14:42:00.807Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/DataDog/guarddog/security/advisories/GHSA-m5p4-gvpx-4mvr",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/DataDog/guarddog/security/advisories/GHSA-m5p4-gvpx-4mvr"
        }
      ],
      "source": {
        "advisory": "GHSA-m5p4-gvpx-4mvr",
        "discovery": "UNKNOWN"
      },
      "title": "GuardDog: Unsanitized human-readable scan output allows terminal escape injection from malicious package content"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-44972",
    "datePublished": "2026-05-27T14:42:00.807Z",
    "dateReserved": "2026-05-08T16:23:33.263Z",
    "dateUpdated": "2026-05-27T15:34:32.271Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

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

GHSA-M5P4-GVPX-4MVR

Summary

Description

Reproduction summary

Key code paths

Practical impact

Prior public disclosure check

Suggested fix

CVE-2026-44972 (GCVE-0-2026-44972)

Tags

Sightings

Nomenclature