Signal is active with 1 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.2.1, HTMLRenderer.heading() builds the opening <hN> tag by string-concatenating the id attribute value directly into the HTML — with no call to escape(), safe_entity(), or any other sanitisation function. A double-quote character " in the id value terminates the attribute, allowing an attacker to inject arbitrary additional attributes (event handlers, src=, href=, etc.) into the heading element. This vulnerability is fixed in 3.2.1.
Priority
LOW
Exploitation
NONE
PoC
YES
Patch
AVAILABLE
Momentum
STABLE
If you run products in this scope, you should treat this CVE as relevant to your environment.
| Date | Total | Labels |
|---|
| 2026-05-11 | 1 | Patch1 |
| 2026-05-14 | 1 | Disclosure1 |
🔴 Mistune, Cross-Site Scripting (XSS), #CVE-2026-44897 (Critical) https://dailycve.com/mistune-cross-site-scripting-xss-cve-2026-44897-critical/
Post summary
A critical XSS vulnerability, CVE-2026-44897, has been identified in Mistune, with the announcement serving primarily as a disclosure of the issue.
OpenHands/OpenHands patched CVE-2026-44897 and CVE-2026-39377 for critical security. Concurrently, Significant-Gravitas/AutoGPT added 5-part concurrent task queues, addressing throughput in autonomous agent execution. ---
Post summary
OpenHands/OpenHands released patches for CVE-2026-44897 and CVE-2026-39377, addressing critical security concerns. No PoC, exploit, or active exploitation details are provided.
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| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | mistune_project | mistune | - | - | - |