- Description
- justhtml versions <= 1.11.0 (fixed in 1.12.0) do not sufficiently escape HTML-significant characters (angle brackets) in text nodes when converting a parsed document to Markdown via to_markdown(). While a small set of Markdown metacharacters are escaped, characters such as < and > are preserved, so untrusted input that is safe in to_html() — including entity-decoded text (e.g. <script>) or text from RCDATA/RAWTEXT-parsed elements like <title>, <textarea>, <noscript>, and <plaintext> — can be emitted as raw HTML in the Markdown output, enabling a sanitizer bypass and potential cross-site scripting when that output is rendered.
- Source
- disclosure@vulncheck.com
- NVD status
- Received
CVSS 4.0
- Type
- Secondary
- Base score
- 9.3
- Impact score
- -
- Exploitability score
- -
- Vector string
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Severity
- CRITICAL
CVSS 3.1
- Type
- Primary
- Base score
- 9.8
- Impact score
- 5.9
- Exploitability score
- 3.9
- Vector string
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Severity
- CRITICAL
- disclosure@vulncheck.com
- CWE-79
- Hype score
- Not currently trending
🚨*CVE* CVE-2026-8445 justhtml versions <= 1.11.0 (fixed in 1.12.0) do not sufficiently escape HTML-significant characters (angle brackets) in text nodes when converting a parsed document to… https://t.co/PfMuBu618V ----- Traducción: CVE-2026-8445 las… https://t.co/utm
@infoflowcloud
23 Aug 2026
13 Impressions
0 Retweets
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CVE-2026-8445 justhtml versions <= 1.11.0 (fixed in 1.12.0) do not sufficiently escape HTML-significant characters (angle brackets) in text nodes when converting a parsed document to… https://t.co/fzGB4ObsMG
@CVEnew
23 Aug 2026
379 Impressions
0 Retweets
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CVE-2026-8445 Cross-Site Scripting in justhtml <= 1.11.0 via Insufficient HTML E... https://t.co/N553QQQpun Customizable Vulnerability Alerts: https://t.co/U7998fz7yk
@VulmonFeeds
23 Aug 2026
40 Impressions
0 Retweets
0 Likes
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0 Quotes