CVE-2026-59928

creationtimestamp| type| source ---|---|--- 2026-07-08 19:26:14+00:00| seen| https://bsky.app/profile/cve.skyfleet.blue/post/3mq5txl3tsx25 2026-07-20 22:36:50+00:00| published-proof-of-concept| https://github.com/lepture/mistune/security/advisories/GHSA-ffq3-xpv3-j92q...

UBUNTU-CVE-2026-59928

Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, a Markdown document containing many repeated or distinct reference-link definitions causes quadratic work in src/mistune/blockparser.py and the reflinks environment dictionary handling, allowing denial of service...