CVE-2026-76098
CVE-2026-76098: 1 tracked advisory record across Red Hat. Compare vendor sources and published fix guidance.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Red Hat
1 advisory- Advisory severityHigh7.5
High [CVE-2026-76098] Denial of Service via excessive emphasis markers in Markdown
CVE-2026-76098Source published Source updated
Mistune is a Python Markdown parser with renderers and plugins. Versions 3.3.0 through 3.3.2 are vulnerable to DoS through deeply nested tokens. HTML rendering creates deeply nested emphasis tokens from consecutive asterisk characters, and recursive rendering in HTMLRenderer.render_token() can exceed Python's recursion limit and raise RecursionError, allowing crafted Markdown to crash a parsing process. This issue is fixed in version 3.3.3 This vulnerability allows a remote attacker to trigger a Denial of Service (DoS) by submitting specially crafted Markdown input. The excessive use of emphasis markers, such as consecutive asterisks, creates deeply nested tokens during HTML rendering. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). Weakness…
- Affected products in this advisory
- Red Hat OpenShift AI (RHOAI)
- Red Hat OpenShift Container Platform 4
- Source-reported affected versions
- 3.3.0
- 3.3.2
- Source-reported fixed versions
- 3.3.3
- Mitigation guidance
- Mitigation for this issue involves restricting the processing of untrusted Markdown content by applications utilizing the vulnerable Mistune library. If applications are exposed to untrusted input, implement input sanitization to prevent deeply nested emphasis structures that could trigger the denial of service.
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