CVE catalog

CVE-2022-34749

mistune affected and fixed versions

In mistune through 2.0.2, support of inline markup is implemented by using regular expressions that can involve a high amount of backtracking on certain edge cases. This behavior is commonly named catastrophic backtracking.

Severity: High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: Jul 25, 2022, 11:15:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 1.62% · Oct 27, 2026

Projects and upstream resources

[mistune][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	mistune	`2.0.3-1`	FixedDistribution-reported fixed boundary	[CVE-2022-34749]
Debiantrixie	mistune	`3.1.3-1`	Fixed	[CVE-2022-34749]
Debiansid	mistune	`2.0.3-1`	FixedDistribution-reported fixed boundary	[CVE-2022-34749]
Debiansid	mistune	`3.4.0-1`	Fixed	[CVE-2022-34749]
Debianforky	mistune	`2.0.3-1`	FixedDistribution-reported fixed boundary	[CVE-2022-34749]
Debianforky	mistune	`3.1.4-1`	Fixed	[CVE-2022-34749]
Debianbookworm	mistune	`2.0.3-1`	FixedDistribution-reported fixed boundary	[CVE-2022-34749]
Debianbookworm	mistune	`2.0.4-1`	Fixed	[CVE-2022-34749]

Showing 8 fix observations. All 20 observations, including unknown and conflicting reports, are available below.

Provider details and historical evidence

Distribution / release	Package	Version	Status	Source
Debianbookworm	mistune	`2.0.3-1`	FixedDistribution-reported fixed boundary	[CVE-2022-34749]
Debianbookworm	mistune	`2.0.4-1`	Fixed	[CVE-2022-34749]
Debianforky	mistune	`2.0.3-1`	FixedDistribution-reported fixed boundary	[CVE-2022-34749]
Debianforky	mistune	`3.1.4-1`	Fixed	[CVE-2022-34749]
Debiansid	mistune	`2.0.3-1`	FixedDistribution-reported fixed boundary	[CVE-2022-34749]
Debiansid	mistune	`3.4.0-1`	Fixed	[CVE-2022-34749]
Debiantrixie	mistune	`2.0.3-1`	FixedDistribution-reported fixed boundary	[CVE-2022-34749]
Debiantrixie	mistune	`3.1.3-1`	Fixed	[CVE-2022-34749]
Opensusetumbleweed	python-mistune	`3.1.0-1.1`	UnknownSource applicability is not established	[OPENSUSE-SU-2025:14637-1]Feb 4, 2026, 4:22:49 AM UTC
Ubuntu16.04	mistune	`0.6-2`	UnknownSource applicability is not established	[UBUNTU-CVE-2022-34749]Oct 24, 2025, 4:53:46 AM UTC
Ubuntu16.04	mistune	`0.7.1-1`	UnknownSource applicability is not established	[UBUNTU-CVE-2022-34749]Oct 24, 2025, 4:53:46 AM UTC
Ubuntu18.04	mistune	`0.7.4-1`	UnknownSource applicability is not established	[UBUNTU-CVE-2022-34749]Oct 24, 2025, 4:53:46 AM UTC
Ubuntu18.04	mistune	`0.8-1`	UnknownSource applicability is not established	[UBUNTU-CVE-2022-34749]Oct 24, 2025, 4:53:46 AM UTC
Ubuntu18.04	mistune	`0.8.1-1`	UnknownSource applicability is not established	[UBUNTU-CVE-2022-34749]Oct 24, 2025, 4:53:46 AM UTC
Ubuntu18.04	mistune	`0.8.3-2`	UnknownSource applicability is not established	[UBUNTU-CVE-2022-34749]Oct 24, 2025, 4:53:46 AM UTC
Ubuntu20.04	mistune	`0.8.4-1`	UnknownSource applicability is not established	[UBUNTU-CVE-2022-34749]Oct 24, 2025, 4:53:46 AM UTC
Ubuntu20.04	mistune	`0.8.4-2`	UnknownSource applicability is not established	[UBUNTU-CVE-2022-34749]Oct 24, 2025, 4:53:46 AM UTC
Ubuntu22.04	mistune	`0.8.4-4`	UnknownSource applicability is not established	[UBUNTU-CVE-2022-34749]Oct 24, 2025, 4:53:46 AM UTC
Ubuntu22.04	mistune	`0.8.4-5`	UnknownSource applicability is not established	[UBUNTU-CVE-2022-34749]Oct 24, 2025, 4:53:46 AM UTC
Ubuntu22.04	mistune	`2.0.0-1+really0.8.4-1`	UnknownSource applicability is not established	[UBUNTU-CVE-2022-34749]Oct 24, 2025, 4:53:46 AM UTC

Original provider fields

{
  "package_releases": [
    {
      "name": "mistune",
      "status": "fixed",
      "release": "sid",
      "version": "3.4.0-1"
    },
    {
      "name": "mistune",
      "status": "fixed",
      "release": "forky",
      "version": "3.1.4-1"
    },
    {
      "name": "mistune",
      "status": "fixed",
      "release": "trixie",
      "version": "3.1.3-1"
    },
    {
      "name": "mistune",
      "status": "fixed",
      "release": "bookworm",
      "version": "2.0.4-1"
    }
  ],
  "fixed_versions": [
    {
      "bug": 1016089,
      "name": "mistune",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "2.0.3-1"
    },
    {
      "bug": 1016089,
      "name": "mistune",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "2.0.3-1"
    },
    {
      "bug": 1016089,
      "name": "mistune",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": "2.0.3-1"
    },
    {
      "bug": 1016089,
      "name": "mistune",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": "2.0.3-1"
    }
  ],
  "distribution_packages": [
    {
      "name": "python-mistune",
      "distro": "opensuse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.1.0-1.1"
            }
          ]
        }
      ],
      "release": "tumbleweed",
      "versions": [],
      "ecosystem": "rpm",
      "provider_url": "https://osv.dev/vulnerability/openSUSE-SU-2025:14637-1",
      "fixed_version": "3.1.0-1.1",
      "provider_source": "pypi",
      "provider_record_id": "OPENSUSE-SU-2025:14637-1",
      "provider_updated_at": "2026-02-04T04:22:49.844031Z",
      "applicability_unknown": true
    },
    {
      "name": "mistune",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "16.04",
      "versions": [
        "0.6-2",
        "0.7.1-1"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2022-34749",
      "fixed_version": "",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2022-34749",
      "provider_updated_at": "2025-10-24T04:53:46Z",
      "applicability_unknown": true
    },
    {
      "name": "mistune",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "18.04",
      "versions": [
        "0.7.4-1",
        "0.8-1",
        "0.8.1-1",
        "0.8.3-2"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2022-34749",
      "fixed_version": "",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2022-34749",
      "provider_updated_at": "2025-10-24T04:53:46Z",
      "applicability_unknown": true
    },
    {
      "name": "mistune",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "20.04",
      "versions": [
        "0.8.4-1",
        "0.8.4-2"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2022-34749",
      "fixed_version": "",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2022-34749",
      "provider_updated_at": "2025-10-24T04:53:46Z",
      "applicability_unknown": true
    },
    {
      "name": "mistune",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "22.04",
      "versions": [
        "0.8.4-4",
        "0.8.4-5",
        "2.0.0-1+really0.8.4-1"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2022-34749",
      "fixed_version": "",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2022-34749",
      "provider_updated_at": "2025-10-24T04:53:46Z",
      "applicability_unknown": true
    }
  ]
}

[Debian bug #1016089]

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[python3-mistune]Unknown
Source package: [mistune]
Details (2)
- 2.0.4-1 · all · bookworm
  Fixed · Fixed: 2.0.3-1
  dsa · mistune · debian · bookworm
- 2.0.4-1 · all · bookworm
  Fixed · Fixed: 2.0.3-1
  dsa · mistune · debian · bookworm

[openSUSE Tumbleweed]

[python313-mistune]Unknown
Source package: [python-mistune]
Details (1)
- 3.3.4-1.1 · noarch · tumbleweed
  Unknown · Fixed: 3.1.0-1.1
  Version impact unknown
  dsa · python-mistune · opensuse · tumbleweed
[python314-mistune]Unknown
Source package: [python-mistune]
Details (1)
- 3.3.4-1.1 · noarch · tumbleweed
  Unknown · Fixed: 3.1.0-1.1
  Version impact unknown
  dsa · python-mistune · opensuse · tumbleweed

Observed: Oct 23, 2026, 6:28:04 PM UTC

References

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