CVE-2026-33347
unknown
CVSS v3
—
CVSS v4 NEW
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VIR risk
—
Description
league/commonmark has an embed extension allowed_domains bypass
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 |
|---|---|---|---|
| debian | bookworm | fixed | 2.3.9-1+deb12u1 |
| debian | bullseye | affected | |
| debian | forky | fixed | 2.8.2-1 |
| debian | sid | fixed | 2.8.2-1 |
| debian | trixie | fixed | 2.7.0-1+deb13u1 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Packagist | league/commonmark | >=2.3.0,<2.8.2 | 2.8.2 |
References
- https://security-tracker.debian.org/tracker/CVE-2026-33347
- https://github.com/thephpleague/commonmark/security/advisories/GHSA-hh8v-hgvp-g3f5
- https://nvd.nist.gov/vuln/detail/CVE-2026-33347
- https://github.com/thephpleague/commonmark/commit/59fb075d2101740c337c7216e3f32b36c204218b
- https://github.com/thephpleague/commonmark
- https://github.com/thephpleague/commonmark/releases/tag/2.8.2
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.