Vulnerability in Mistune Project
CVE-2022-34749
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.
Vulnerability class: ReDoS (Regular Expression Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.015 (73.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 73.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: +0.000
Affected products
- Mistune Project
- Fedoraproject Fedora — versions 37
Weakness classification (CWE)
References
- github.com/lepture/mistune/releases (Third Party Advisory, Release Notes)
- github.com/lepture/mistune/commit/a6d43215132fe4f3d93f8d7e90ba83b16a0838b2 (Patch, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
Frequently asked questions
- What is CVE-2022-34749?
- CVE-2022-34749 is a high-severity vulnerability in Mistune Project, classified under Inefficient Regular Expression Complexity. CVSS score: 7.5/10. Published 2022-07-25.
- How severe is CVE-2022-34749?
- High severity. CVSS v3 base score is 7.5 out of 10.