CVE-2026-25543
unknown
CVSS v3
—
CVSS v4 NEW
—
VIR risk
—
Description
HtmlSanitizer has a bypass via template tag
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.
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| NuGet | HtmlSanitizer | <9.0.892 | 9.0.892 |
| NuGet | HtmlSanitizer | >=9.1.878-beta,<9.1.893-beta | 9.1.893-beta |
References
- https://github.com/mganss/HtmlSanitizer/security/advisories/GHSA-j92c-7v7g-gj3f
- https://nvd.nist.gov/vuln/detail/CVE-2026-25543
- https://github.com/mganss/HtmlSanitizer/commit/0ac53dca30ddad963f2b243669a5066933d82b81
- https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements/template
- https://github.com/mganss/HtmlSanitizer
- https://github.com/mganss/HtmlSanitizer/releases/tag/v9.0.892
- https://www.nuget.org/packages/HtmlSanitizer/9.0.892
- https://www.nuget.org/packages/HtmlSanitizer/9.1.893-beta
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.