lepture/mistune · Security
Mistune vulnerable to catastrophic backtracking
- GHSA ID
- GHSA-fw3v-x4f2-v673
- CVE ID
- CVE-2022-34749
- Severity
- high
- Published
- Updated
- CVSS
- 8.6 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
- CVSS v3
- 8.6 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
- CVSS v4
- 8.8 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
Description
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.
CWEs
- CWE-1333 · Inefficient Regular Expression Complexity
References
- https://nvd.nist.gov/vuln/detail/CVE-2022-34749 ↗
- https://github.com/lepture/mistune/commit/a6d43215132fe4f3d93f8d7e90ba83b16a0838b2 ↗
- https://github.com/lepture/mistune/releases ↗
- https://github.com/pypa/advisory-database/tree/main/vulns/mistune/PYSEC-2022-237.yaml ↗
- https://github.com/lepture/mistune/issues/314#issuecomment-1223972386 ↗
- https://github.com/lepture/mistune/commit/ca1e7b506850f4e488823fc7338b49a8f9852718 ↗
- https://lists.fedoraproject.org/archives/list/[email protected]/message/TQHXITQ2DSBYOILKHXBSBB7PFBPZHF63 ↗
- https://github.com/advisories/GHSA-fw3v-x4f2-v673 ↗