Vulnerability-Lookup

Vulnerability from bitnami_vulndb

Published

2026-03-25 08:52

Modified

2026-03-25 09:15

Summary

webbrowser.open() allows leading dashes in URLs

Details

The webbrowser.open() API would accept leading dashes in the URL which could be handled as command line options for certain web browsers. New behavior rejects leading dashes. Users are recommended to sanitize URLs prior to passing to webbrowser.open().

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "python",
        "purl": "pkg:bitnami/python"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.15.0"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/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",
          "type": "CVSS_V4"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-4519"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*"
    ],
    "severity": "High"
  },
  "details": "The webbrowser.open() API would accept leading dashes in the URL which \ncould be handled as command line options for certain web browsers. New \nbehavior rejects leading dashes. Users are recommended to sanitize URLs \nprior to passing to webbrowser.open().",
  "id": "BIT-python-2026-4519",
  "modified": "2026-03-25T09:15:17.567Z",
  "published": "2026-03-25T08:52:23.976Z",
  "references": [
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/03/20/1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/43fe06b96f6a6cf5cfd5bdab20b8649374956866"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/82a24a4442312bdcfc4c799885e8b3e00990f02b"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/9669a912a0e329c094e992204d6bdb8787024d76"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/ad4d5ba32af4d80b0dfa2ba9d8203bfb219e60a5"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/ceac1efc66516ac387eef2c9a0ce671895b44f03"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/issues/143930"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/pull/143931"
    },
    {
      "type": "WEB",
      "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/AY5NDSS433JK56Q7Q5IS7B37QFZVVOUS/"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4519"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "webbrowser.open() allows leading dashes in URLs"
}

CVE-2026-4519 (GCVE-0-2026-4519)

Vulnerability from cvelistv5 – Published: 2026-03-20 15:08 – Updated: 2026-03-25 17:32

Title

webbrowser.open() allows leading dashes in URLs

Summary

Severity ?

7 (High)


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

CWE

CWE-20 - Improper Input Validation

Assigner

PSF

References

URL

Tags

	https://github.com/python/cpython/pull/143931	patch
	https://github.com/python/cpython/issues/143930	issue-tracking
	https://mail.python.org/archives/list/security-an…	vendor-advisory
	https://github.com/python/cpython/commit/43fe06b9…	patch
	https://github.com/python/cpython/commit/82a24a44…	patch
	https://github.com/python/cpython/commit/9669a912…	patch
	https://github.com/python/cpython/commit/ad4d5ba3…	patch
	https://github.com/python/cpython/commit/ceac1efc…	patch
	https://github.com/python/cpython/commit/cbba6119…	patch

Impacted products

	Vendor	Product	Version
	Python Software Foundation	CPython	Affected: 0 , < 3.15.0 (python)

Credits

Seth Larson Gregory P. Smith

Show details on NVD website

JSON

To clipboard

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        "providerMetadata": {
          "dateUpdated": "2026-03-20T20:07:08.244Z",
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        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/03/20/1"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
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            "other": {
              "content": {
                "id": "CVE-2026-4519",
                "options": [
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                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
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                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-25T14:30:47.809505Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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        "problemTypes": [
          {
            "descriptions": [
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                "cweId": "CWE-20",
                "description": "CWE-20 Improper Input Validation",
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
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    ],
    "cna": {
      "affected": [
        {
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          "modules": [
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          ],
          "product": "CPython",
          "repo": "https://github.com/python/cpython",
          "vendor": "Python Software Foundation",
          "versions": [
            {
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              "version": "0",
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          "type": "coordinator",
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        },
        {
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          "type": "remediation reviewer",
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            }
          ],
          "value": "The webbrowser.open() API would accept leading dashes in the URL which \ncould be handled as command line options for certain web browsers. New \nbehavior rejects leading dashes. Users are recommended to sanitize URLs \nprior to passing to webbrowser.open()."
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      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "LOCAL",
            "baseScore": 7,
            "baseSeverity": "HIGH",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "ACTIVE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
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            "vulnerabilityResponseEffort": "NOT_DEFINED"
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          "scenarios": [
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          "url": "https://github.com/python/cpython/issues/143930"
        },
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          "tags": [
            "vendor-advisory"
          ],
          "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/AY5NDSS433JK56Q7Q5IS7B37QFZVVOUS/"
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        }
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      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "webbrowser.open() allows leading dashes in URLs",
      "x_generator": {
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      }
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  },
  "cveMetadata": {
    "assignerOrgId": "28c92f92-d60d-412d-b760-e73465c3df22",
    "assignerShortName": "PSF",
    "cveId": "CVE-2026-4519",
    "datePublished": "2026-03-20T15:08:32.576Z",
    "dateReserved": "2026-03-20T15:01:11.126Z",
    "dateUpdated": "2026-03-25T17:32:00.548Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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

Vulnerability from bitnami_vulndb

CVE-2026-4519 (GCVE-0-2026-4519)

Tags

Sightings

Nomenclature