Technology · PyPI
justhtml (PyPI) vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 16 vulnerabilities in justhtml (PyPI): 0 in the last 7 days and 12 in the last 90 days, 3 of them critical and 0 exploited in the wild. The most recent, justhtml uncontrolled recursion DoS via deeply nested HTML, was published on 23 August 2026.
- Last 7 days
- 0
- Last 90 days
- 12
- Critical, all time
- 3
- Exploited in the wild
- 0
About justhtml (PyPI)
A Python library for generating HTML documents using Pythonic syntax.
Latest justhtml (PyPI) vulnerabilities
- justhtml uncontrolled recursion DoS via deeply nested HTMLhighCVSS 7.5
- CVE-2026-9769: justhtml through 1.9.1 (fixed in 1.10.0) is vulnerable to uncontrolled recursion leading to denial of service. During…highCVSS 7.5EPSS 0.5%
- CVE-2026-8630: justhtml mutation XSS in raw-text element serializationmediumCVSS 6.1EPSS 0.3%
- CVE-2026-8445: justhtml HTML escaping bypass in Markdown conversioncriticalCVSS 9.8EPSS 0.6%
- CVE-2026-7808: justhtml HTML sanitization bypass leading to XSScriticalCVSS 9.8EPSS 0.6%
- CVE-2026-77088: justhtml to_markdown() cross-site scripting in code spanmediumCVSS 6.1EPSS 0.3%
- CVE-2026-74793: justhtml cross-site scripting in selectedcontent projectionmediumCVSS 6.1EPSS 0.3%
- CVE-2026-6827: justhtml multiple sanitization and DOM handling vulnerabilitiesmediumCVSS 6.1EPSS 0.3%
- CVE-2026-5751: justhtml mutation cross-site scripting in custom sanitization policiesmediumCVSS 6.1EPSS 0.3%
- CVE-2026-5389: justhtml to_markdown() cross-site scripting via code fence breakoutmediumCVSS 6.1EPSS 0.3%
- CVE-2026-5388: justhtml multiple security issues in URL sanitization and HTML serializationcriticalCVSS 9.8EPSS 0.6%
- CVE-2026-4671: justhtml denial-of-service in CSS selector handling and linkificationhighCVSS 7.5EPSS 0.7%
- EmilStenstrom justhtml XSS in to_markdown via code-span breakoutmediumCVSS 6.1
- justhtml has sanitization bypass in custom policies and programmatic DOMmedium
- EmilStenstrom justhtml multiple sanitization bypasseslowCVSS 1.3
- EmilStenstrom justhtml multiple XSS and sanitization bypassesmediumCVSS 6.1
Most severe justhtml (PyPI) vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-8445: justhtml HTML escaping bypass in Markdown conversioncriticalCVSS 9.8EPSS 0.6%
- CVE-2026-7808: justhtml HTML sanitization bypass leading to XSScriticalCVSS 9.8EPSS 0.6%
- CVE-2026-5388: justhtml multiple security issues in URL sanitization and HTML serializationcriticalCVSS 9.8EPSS 0.6%
- CVE-2026-4671: justhtml denial-of-service in CSS selector handling and linkificationhighCVSS 7.5EPSS 0.7%
- CVE-2026-9769: justhtml through 1.9.1 (fixed in 1.10.0) is vulnerable to uncontrolled recursion leading to denial of service. During…highCVSS 7.5EPSS 0.5%
- justhtml uncontrolled recursion DoS via deeply nested HTMLhighCVSS 7.5
- CVE-2026-74793: justhtml cross-site scripting in selectedcontent projectionmediumCVSS 6.1EPSS 0.3%
- CVE-2026-8630: justhtml mutation XSS in raw-text element serializationmediumCVSS 6.1EPSS 0.3%
- CVE-2026-77088: justhtml to_markdown() cross-site scripting in code spanmediumCVSS 6.1EPSS 0.3%
- CVE-2026-6827: justhtml multiple sanitization and DOM handling vulnerabilitiesmediumCVSS 6.1EPSS 0.3%
Vulnerabilities per week
The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 29 Jun 2026 | 0 | 0 | |
| 6 Jul 2026 | 0 | 0 | |
| 13 Jul 2026 | 0 | 0 | |
| 20 Jul 2026 | 0 | 0 | |
| 27 Jul 2026 | 0 | 0 | |
| 3 Aug 2026 | 0 | 0 | |
| 10 Aug 2026 | 0 | 0 | |
| 17 Aug 2026 | 12 | 3 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 |
How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/justhtml.json, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "justhtml (PyPI) vulnerabilities", https://junglewise.ai/threats/technologies/justhtml, 27 September 2026.