What’s Vulnerable › Vulnerabilities

CVE-2022-34749

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-07-25 · updated 2026-06-17
• Weakness: CWE-1333

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.

Affected products

• Fedoraproject Fedora: 37
• lepture mistune: through 2.0.2

References

• https://github.com/lepture/mistune/commit/a6d43215132fe4f3d93f8d7e90ba83b16a0838b2
• https://github.com/lepture/mistune/releases
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TQHXITQ2DSBYOILKHXBSBB7PFBPZHF63/
• https://github.com/lepture/mistune/commit/a6d43215132fe4f3d93f8d7e90ba83b16a0838b2
• https://github.com/lepture/mistune/releases
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TQHXITQ2DSBYOILKHXBSBB7PFBPZHF63/

Get alerted when CVE-2022-34749 or the next vulnerability affects your stack