CVE-2026-44401

MEDIUMPre-NVD 4.84.8—
EchelonGraph scoreMEDIUM confidence

Score 4.8 from GitHub Security Advisory published 2026-08-10. A secondary CVSS source baseline 4.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
4.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 4.8Exploit: Elevated riskExposed services: Not assessed

No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.

Typemill CMS version 2.x contains a persistent cross-site scripting vulnerability in the Markdown parser extension that allows authenticated users with theme-configuration access to inject malicious JavaScript URIs by supplying unsanitized href values in Markdown links. Attackers can craft Markdown links using the javascript: scheme through ParsedownExtension.php or TwigMarkdownExtension.php, storing a persistent payload that executes in the browser of every visitor who clicks the link, enabling session cookie theft, authenticated request forgery, and credential harvesting.

CVSS v3
4.8
EG Score
4.8MEDIUMmedium confidence
EG Risk
38
EG Risk 38/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity48% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.3%
EPSS %ILE
22nd
KEV
Not listed

CISA SSVCTrack at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 10, 2026

Last Modified

September 10, 2026

Advisory Details (2)

Auto-updated Aug 10, 2026
No patch confirmed yet.
generic

Typemill CMS 2.x Persistent XSS via Markdown javascript URI | Advisories | VulnCheck

https://www.vulncheck.com/advisories/typemill-cms-2-x-persistent-xss-via-markdown-javascript-uri
generic

GitHub - typemill/typemill: Typemill is a flat-file CMS based on Markdown and designed for informational websites like documentation, manuals, and handbooks. · GitHub

https://github.com/typemill/typemill

Vendor Advisories for CVE-2026-44401(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 14× in last 7d / 67× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 138 total refreshes for this CVE.

  1. 2026-10-04 23:51 UTCEG score recompute
  2. 2026-10-04 23:51 UTCGHSA enrichment
  3. 2026-10-04 23:22 UTCEPSS rescore
  4. 2026-10-03 22:48 UTCEG score recompute
  5. 2026-10-03 22:48 UTCGHSA enrichment
  6. 2026-10-03 14:25 UTCEPSS rescore
  7. 2026-10-02 09:17 UTCEG score recompute
  8. 2026-10-02 09:17 UTCGHSA enrichment
  9. 2026-10-01 19:50 UTCEPSS rescore
  10. 2026-09-30 22:25 UTCEG score recompute
  11. 2026-09-30 22:25 UTCGHSA enrichment
  12. 2026-09-30 15:03 UTCEPSS rescore
  13. 2026-09-28 13:35 UTCEG score recompute
  14. 2026-09-28 13:35 UTCGHSA enrichment
  15. 2026-09-27 13:48 UTCEPSS rescore
  16. 2026-09-27 12:33 UTCEG score recompute
  17. 2026-09-27 12:33 UTCGHSA enrichment
  18. 2026-09-26 15:58 UTCEPSS rescore
  19. 2026-09-25 04:00 UTCEG score recompute
  20. 2026-09-25 04:00 UTCGHSA enrichment
  21. 2026-09-23 17:53 UTCEPSS rescore
  22. 2026-09-23 13:45 UTCEG score recompute
  23. 2026-09-23 13:45 UTCGHSA enrichment
  24. 2026-09-22 12:42 UTCEG score recompute
  25. 2026-09-22 12:42 UTCGHSA enrichment
Show 75 more
  1. 2026-09-21 11:31 UTCEG score recompute
  2. 2026-09-21 11:31 UTCGHSA enrichment
  3. 2026-09-20 20:15 UTCEPSS rescore
  4. 2026-09-20 10:27 UTCEG score recompute
  5. 2026-09-20 10:27 UTCGHSA enrichment
  6. 2026-09-19 06:20 UTCEG score recompute
  7. 2026-09-19 06:20 UTCGHSA enrichment
  8. 2026-09-18 19:28 UTCEPSS rescore
  9. 2026-09-18 04:53 UTCEG score recompute
  10. 2026-09-18 04:53 UTCGHSA enrichment
  11. 2026-09-17 19:31 UTCEPSS rescore
  12. 2026-09-17 03:50 UTCEG score recompute
  13. 2026-09-17 03:50 UTCGHSA enrichment
  14. 2026-09-16 14:08 UTCEPSS rescore
  15. 2026-09-16 05:15 UTCEPSS rescore
  16. 2026-09-16 02:28 UTCEG score recompute
  17. 2026-09-16 02:27 UTCGHSA enrichment
  18. 2026-09-15 01:22 UTCGHSA enrichment
  19. 2026-09-14 00:19 UTCEG score recompute
  20. 2026-09-14 00:19 UTCGHSA enrichment
  21. 2026-09-13 16:47 UTCEPSS rescore
  22. 2026-09-12 23:17 UTCEG score recompute
  23. 2026-09-12 23:17 UTCGHSA enrichment
  24. 2026-09-12 15:01 UTCEPSS rescore
  25. 2026-09-11 22:04 UTCEG score recompute
  26. 2026-09-11 22:03 UTCGHSA enrichment
  27. 2026-09-11 14:53 UTCEPSS rescore
  28. 2026-09-11 09:37 UTCEPSS rescore
  29. 2026-09-10 20:59 UTCEG score recompute
  30. 2026-09-10 20:59 UTCGHSA enrichment
  31. 2026-09-10 09:34 UTCEPSS rescore
  32. 2026-09-10 06:53 UTCEG score recompute
  33. 2026-09-10 06:53 UTCGHSA enrichment
  34. 2026-09-09 05:50 UTCEG score recompute
  35. 2026-09-09 05:50 UTCGHSA enrichment
  36. 2026-09-08 22:00 UTCEPSS rescore
  37. 2026-09-07 17:13 UTCEG score recompute
  38. 2026-09-07 17:13 UTCGHSA enrichment
  39. 2026-09-07 16:01 UTCEPSS rescore
  40. 2026-09-06 13:47 UTCEPSS rescore
  41. 2026-09-06 05:28 UTCEG score recompute
  42. 2026-09-06 05:27 UTCGHSA enrichment
  43. 2026-09-05 04:24 UTCEG score recompute
  44. 2026-09-05 04:24 UTCGHSA enrichment
  45. 2026-09-04 05:06 UTCEPSS rescore
  46. 2026-09-04 03:19 UTCGHSA enrichment
  47. 2026-09-03 02:05 UTCEG score recompute
  48. 2026-09-03 02:05 UTCGHSA enrichment
  49. 2026-09-02 14:12 UTCEPSS rescore
  50. 2026-09-01 23:12 UTCEG score recompute
  51. 2026-09-01 23:12 UTCGHSA enrichment
  52. 2026-09-01 13:54 UTCEPSS rescore
  53. 2026-08-31 22:08 UTCEG score recompute
  54. 2026-08-31 22:08 UTCGHSA enrichment
  55. 2026-08-30 19:17 UTCEPSS rescore
  56. 2026-08-30 16:21 UTCEG score recompute
  57. 2026-08-30 16:21 UTCGHSA enrichment
  58. 2026-08-30 01:22 UTCEPSS rescore
  59. 2026-08-29 15:18 UTCEG score recompute
  60. 2026-08-29 15:18 UTCGHSA enrichment
  61. 2026-08-28 21:41 UTCEPSS rescore
  62. 2026-08-28 11:36 UTCGHSA enrichment
  63. 2026-08-27 07:29 UTCEG score recompute
  64. 2026-08-27 07:29 UTCGHSA enrichment
  65. 2026-08-26 14:46 UTCEPSS rescore
  66. 2026-08-26 05:22 UTCEG score recompute
  67. 2026-08-26 05:22 UTCGHSA enrichment
  68. 2026-08-25 13:49 UTCEPSS rescore
  69. 2026-08-25 03:59 UTCEG score recompute
  70. 2026-08-25 03:59 UTCGHSA enrichment
  71. 2026-08-24 02:56 UTCGHSA enrichment
  72. 2026-08-23 01:51 UTCEG score recompute
  73. 2026-08-23 01:51 UTCGHSA enrichment
  74. 2026-08-23 00:19 UTCEPSS rescore
  75. 2026-08-22 00:48 UTCEG score recompute

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCsn0x-sharma/CVE-2026-44401
    First seen Aug 11, 2026

    Persistent XSS in Typemill CMS: the Markdown parser lets javascript: URIs through unfiltered. Writeup + PoC.

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-44401?
CVE-2026-44401 is a medium vulnerability published on August 10, 2026. Typemill CMS version 2.x contains a persistent cross-site scripting vulnerability in the Markdown parser extension that allows authenticated users with theme-configuration access to inject malicious JavaScript URIs by supplying unsanitized href values in Markdown links. Attackers can craft Markdown…
When was CVE-2026-44401 disclosed?
CVE-2026-44401 was first published on August 10, 2026, with the most recent update on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-44401 actively exploited?
CVE-2026-44401 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (22nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-44401?
CVE-2026-44401 has a CVSS base score of 4.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-44401?
No fix for CVE-2026-44401 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-44401 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-44401

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