CVE-Katalog

CVE-2021-32837

python-mechanize affected and fixed versions

mechanize, a library for automatically interacting with HTTP web servers, contains a regular expression that is vulnerable to regular expression denial of service (ReDoS) prior to version 0.4.6. If a web server responds in a malicious way, then mechanize could crash. Version 0.4.6 has a patch for the issue.

Schweregrad: High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: Jan 1, 2021, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 28.87% · Oct 27, 2026

Projects and upstream resources

[python-mechanize][Source-reported homepage]

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Distribution / release	Package	Version	Status	Source
Debiantrixie	python-mechanize	`1:0.4.10+ds-4`	Fixed	[CVE-2021-32837]
Debiantrixie	python-mechanize	`1:0.4.7-1`	FixedDistribution-reported fixed boundary	[CVE-2021-32837]
Debiansid	python-mechanize	`1:0.4.10+ds1-3`	Fixed	[CVE-2021-32837]
Debiansid	python-mechanize	`1:0.4.7-1`	FixedDistribution-reported fixed boundary	[CVE-2021-32837]
Debianforky	python-mechanize	`1:0.4.10+ds1-3`	Fixed	[CVE-2021-32837]
Debianforky	python-mechanize	`1:0.4.7-1`	FixedDistribution-reported fixed boundary	[CVE-2021-32837]
Debianbookworm	python-mechanize	`1:0.4.7-1`	FixedDistribution-reported fixed boundary	[CVE-2021-32837]
Debianbookworm	python-mechanize	`1:0.4.8+pypi-5`	Fixed	[CVE-2021-32837]

Showing 8 fix observations. All 17 observations, including unknown and conflicting reports, are available below.

Provider details and historical evidence

Distribution / release	Package	Version	Status	Source
Debianbookworm	python-mechanize	`1:0.4.7-1`	FixedDistribution-reported fixed boundary	[CVE-2021-32837]
Debianbookworm	python-mechanize	`1:0.4.8+pypi-5`	Fixed	[CVE-2021-32837]
Debianforky	python-mechanize	`1:0.4.10+ds1-3`	Fixed	[CVE-2021-32837]
Debianforky	python-mechanize	`1:0.4.7-1`	FixedDistribution-reported fixed boundary	[CVE-2021-32837]
Debiansid	python-mechanize	`1:0.4.10+ds1-3`	Fixed	[CVE-2021-32837]
Debiansid	python-mechanize	`1:0.4.7-1`	FixedDistribution-reported fixed boundary	[CVE-2021-32837]
Debiantrixie	python-mechanize	`1:0.4.10+ds-4`	Fixed	[CVE-2021-32837]
Debiantrixie	python-mechanize	`1:0.4.7-1`	FixedDistribution-reported fixed boundary	[CVE-2021-32837]
Opensuseleap 15.4	python-mechanize	`0.4.8-bp154.2.3.1`	UnknownSource applicability is not established	[OPENSUSE-SU-2023:0030-1]Feb 4, 2026, 4:28:02 AM UTC
Opensusetumbleweed	python-mechanize	`0.4.10-1.4`	UnknownSource applicability is not established	[OPENSUSE-SU-2025:15098-1]Feb 4, 2026, 2:58:13 AM UTC
Susepackage hub 15 sp4	python-mechanize	`0.4.8-bp154.2.3.1`	UnknownSource applicability is not established	[OPENSUSE-SU-2023:0030-1]Feb 4, 2026, 4:28:02 AM UTC
Ubuntu16.04	python-mechanize	`1:0.2.5-3`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-32837]Oct 24, 2025, 4:50:21 AM UTC
Ubuntu18.04	python-mechanize	`1:0.2.5-3`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-32837]Oct 24, 2025, 4:50:21 AM UTC
Ubuntu20.04	python-mechanize	`1:0.2.5-3`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-32837]Oct 24, 2025, 4:50:21 AM UTC
Ubuntu20.04	python-mechanize	`1:0.4.3-2`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-32837]Oct 24, 2025, 4:50:21 AM UTC
Ubuntu20.04	python-mechanize	`1:0.4.5-1`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-32837]Oct 24, 2025, 4:50:21 AM UTC
Ubuntu20.04	python-mechanize	`1:0.4.5-2`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-32837]Oct 24, 2025, 4:50:21 AM UTC

Original provider fields

{
  "package_releases": [
    {
      "name": "python-mechanize",
      "status": "fixed",
      "release": "sid",
      "version": "1:0.4.10+ds1-3"
    },
    {
      "name": "python-mechanize",
      "status": "fixed",
      "release": "forky",
      "version": "1:0.4.10+ds1-3"
    },
    {
      "name": "python-mechanize",
      "status": "fixed",
      "release": "trixie",
      "version": "1:0.4.10+ds-4"
    },
    {
      "name": "python-mechanize",
      "status": "fixed",
      "release": "bookworm",
      "version": "1:0.4.8+pypi-5"
    }
  ],
  "fixed_versions": [
    {
      "bug": null,
      "name": "python-mechanize",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "1:0.4.7-1"
    },
    {
      "bug": null,
      "name": "python-mechanize",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "1:0.4.7-1"
    },
    {
      "bug": null,
      "name": "python-mechanize",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": "1:0.4.7-1"
    },
    {
      "bug": null,
      "name": "python-mechanize",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": "1:0.4.7-1"
    }
  ],
  "distribution_packages": [
    {
      "name": "python-mechanize",
      "distro": "suse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.4.8-bp154.2.3.1"
            }
          ]
        }
      ],
      "release": "package hub 15 sp4",
      "versions": [],
      "ecosystem": "rpm",
      "provider_url": "https://osv.dev/vulnerability/openSUSE-SU-2023:0030-1",
      "fixed_version": "0.4.8-bp154.2.3.1",
      "provider_source": "pypi",
      "provider_record_id": "OPENSUSE-SU-2023:0030-1",
      "provider_updated_at": "2026-02-04T04:28:02.239792Z",
      "applicability_unknown": true
    },
    {
      "name": "python-mechanize",
      "distro": "opensuse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.4.8-bp154.2.3.1"
            }
          ]
        }
      ],
      "release": "leap 15.4",
      "versions": [],
      "ecosystem": "rpm",
      "provider_url": "https://osv.dev/vulnerability/openSUSE-SU-2023:0030-1",
      "fixed_version": "0.4.8-bp154.2.3.1",
      "provider_source": "pypi",
      "provider_record_id": "OPENSUSE-SU-2023:0030-1",
      "provider_updated_at": "2026-02-04T04:28:02.239792Z",
      "applicability_unknown": true
    },
    {
      "name": "python-mechanize",
      "distro": "opensuse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
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            {
              "introduced": "0"
            },
            {
              "fixed": "0.4.10-1.4"
            }
          ]
        }
      ],
      "release": "tumbleweed",
      "versions": [],
      "ecosystem": "rpm",
      "provider_url": "https://osv.dev/vulnerability/openSUSE-SU-2025:15098-1",
      "fixed_version": "0.4.10-1.4",
      "provider_source": "pypi",
      "provider_record_id": "OPENSUSE-SU-2025:15098-1",
      "provider_updated_at": "2026-02-04T02:58:13.113532Z",
      "applicability_unknown": true
    },
    {
      "name": "python-mechanize",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "16.04",
      "versions": [
        "1:0.2.5-3"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2021-32837",
      "fixed_version": "",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2021-32837",
      "provider_updated_at": "2025-10-24T04:50:21Z",
      "applicability_unknown": true
    },
    {
      "name": "python-mechanize",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "18.04",
      "versions": [
        "1:0.2.5-3"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2021-32837",
      "fixed_version": "",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2021-32837",
      "provider_updated_at": "2025-10-24T04:50:21Z",
      "applicability_unknown": true
    },
    {
      "name": "python-mechanize",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "20.04",
      "versions": [
        "1:0.2.5-3",
        "1:0.4.3-2",
        "1:0.4.5-1",
        "1:0.4.5-2"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2021-32837",
      "fixed_version": "",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2021-32837",
      "provider_updated_at": "2025-10-24T04:50:21Z",
      "applicability_unknown": true
    }
  ]
}

OpenFactory catalog packages

Die Paketzuordnung läuft.

[Debian 12 (Bookworm)]

[python3-mechanize]Unbekannt
Quellpaket: [python-mechanize]
Details (2)
- 1:0.4.8+pypi-5 · all · bookworm
  Behoben · Behoben: 1:0.4.7-1
  dsa · python-mechanize · debian · bookworm; dsa · python-mechanize · debian · 12
- 1:0.4.8+pypi-5 · all · bookworm
  Behoben · Behoben: 1:0.4.7-1
  dsa · python-mechanize · debian · bookworm; dsa · python-mechanize · debian · 12

[Debian 13 (Trixie)]

[python3-mechanize]Unbekannt
Quellpaket: [python-mechanize]
Details (2)
- 1:0.4.10+ds-4 · all · trixie
  Behoben · Behoben: 1:0.4.7-1
  dsa · python-mechanize · debian · 13
- 1:0.4.10+ds-4 · all · trixie
  Behoben · Behoben: 1:0.4.7-1
  dsa · python-mechanize · debian · 13

[openSUSE Tumbleweed]

[python313-mechanize]Unbekannt
Quellpaket: [python-mechanize]
Details (1)
- 0.4.10-3.4 · noarch · tumbleweed
  Unbekannt · Behoben: 0.4.10-1.4
  Version impact unknown
  dsa · python-mechanize · opensuse · tumbleweed
[python314-mechanize]Unbekannt
Quellpaket: [python-mechanize]
Details (1)
- 0.4.10-3.4 · noarch · tumbleweed
  Unbekannt · Behoben: 0.4.10-1.4
  Version impact unknown
  dsa · python-mechanize · opensuse · tumbleweed

Beobachtet: Oct 23, 2026, 5:57:35 PM UTC

Referenzen

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]