CVE-2026-33079
high
CVSS v3
—
CVSS v4 NEW
8.7
VIR risk
8.0
Description
Mistune has a ReDoS in LINK_TITLE_RE that allows denial of service via crafted Markdown input
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 0 |
| debian | bullseye | fixed | 0 |
| debian | forky | affected | |
| debian | sid | affected | |
| debian | trixie | affected | |
| windows | affected | |
References
- https://github.com/lepture/mistune/blob/df23edd60b43b639d2e6760ef9dd3d618aa11c21/src/mistune/helpers.py#L20-L25
- https://github.com/lepture/mistune/security/advisories/GHSA-8mp2-v27r-99xp
- https://nvd.nist.gov/vuln/detail/CVE-2026-33079
- https://github.com/lepture/mistune
- https://www.suse.com/security/cve/CVE-2026-33079.html
- https://security-tracker.debian.org/tracker/CVE-2026-33079
- https://github.com/advisories/GHSA-8mp2-v27r-99xp
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33079
CWEs
CWE-1333
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.