CVE-2026-44896

MEDIUMNVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.1 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 90% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
6.1
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.1Exploit: NoneExposed: 0

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

Mistune is a Python Markdown parser with renderers and plugins. In 3.2.0 and earlier, in src/mistune/directives/image.py, the render_figure() function concatenates figclass and figwidth options directly into HTML attributes without escaping. This allows attribute injection and XSS even when HTMLRenderer(escape=True) is used, because these values bypass the inline renderer. Version 3.2.1 contains a patch.

CVSS v3
6.1
EG Score
6.1(medium)
EPSS
9.8%
KEV
Not listed

Published

May 26, 2026

Last Modified

June 9, 2026

Advisory Details (2)

Auto-updated Jun 13, 2026
Patch available. Sources: github_commit, github.
github Patch Available

XSS via unescaped figclass/figwidth in Figure directive · Advisory · lepture/mistune · GitHub

https://github.com/lepture/mistune/security/advisories/GHSA-58cw-g322-p94v
github_commit Patch Available

commit a3cb6e565530 (lepture/mistune)

Patch available: lepture/mistune v3.2.1 (contains commit a3cb6e565530)

https://github.com/lepture/mistune/commit/a3cb6e5655308797e8be021d6c7b5bab13cbace2

Vendor Advisories for CVE-2026-44896(2)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
pipmistune—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
mistune0.1.0 ... 3.2.0 (49 versions)3.2.1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 47× 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 120 total refreshes for this CVE.

  1. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 02:00 UTCEPSS rescore
  3. 2026-07-13 22:30 UTCEPSS rescore
  4. 2026-07-13 06:13 UTCEPSS rescore
  5. 2026-07-12 05:46 UTCEPSS rescore
  6. 2026-07-11 08:27 UTCEPSS rescore
  7. 2026-07-09 19:10 UTCEPSS rescore
  8. 2026-07-08 15:16 UTCEPSS rescore
  9. 2026-07-07 13:46 UTCEPSS rescore
  10. 2026-07-06 16:27 UTCEPSS rescore
  11. 2026-07-06 02:23 UTCEPSS rescore
  12. 2026-07-05 02:30 UTCEPSS rescore
  13. 2026-07-04 06:31 UTCEPSS rescore
  14. 2026-07-01 15:07 UTCEPSS rescore
  15. 2026-07-01 12:06 UTCEG score recompute
  16. 2026-07-01 12:06 UTCVendor advisory
  17. 2026-06-30 23:22 UTCEPSS rescore
  18. 2026-06-29 21:55 UTCEG score recompute
  19. 2026-06-29 21:55 UTCVendor advisory
  20. 2026-06-29 14:06 UTCEPSS rescore
  21. 2026-06-29 14:06 UTCEPSS rescore
  22. 2026-06-28 22:41 UTCEG score recompute
  23. 2026-06-28 22:41 UTCVendor advisory
  24. 2026-06-28 14:07 UTCEPSS rescore
  25. 2026-06-28 04:56 UTCEPSS rescore
Show 75 more
  1. 2026-06-28 04:56 UTCEPSS rescore
  2. 2026-06-27 18:50 UTCEG score recompute
  3. 2026-06-27 18:50 UTCVendor advisory
  4. 2026-06-27 03:08 UTCEPSS rescore
  5. 2026-06-26 17:31 UTCEG score recompute
  6. 2026-06-26 17:31 UTCVendor advisory
  7. 2026-06-25 13:49 UTCEPSS rescore
  8. 2026-06-25 13:49 UTCEPSS rescore
  9. 2026-06-25 10:01 UTCEG score recompute
  10. 2026-06-25 10:01 UTCVendor advisory
  11. 2026-06-24 14:05 UTCEPSS rescore
  12. 2026-06-23 21:33 UTCEPSS rescore
  13. 2026-06-22 14:25 UTCEPSS rescore
  14. 2026-06-22 14:25 UTCEPSS rescore
  15. 2026-06-21 14:56 UTCEPSS rescore
  16. 2026-06-21 14:56 UTCEPSS rescore
  17. 2026-06-21 01:59 UTCEPSS rescore
  18. 2026-06-19 19:25 UTCEPSS rescore
  19. 2026-06-17 21:03 UTCEG score recompute
  20. 2026-06-17 17:53 UTCEPSS rescore
  21. 2026-06-16 21:43 UTCEG score recompute
  22. 2026-06-16 17:52 UTCEPSS rescore
  23. 2026-06-15 22:27 UTCEG score recompute
  24. 2026-06-15 22:27 UTCVendor advisory
  25. 2026-06-15 17:49 UTCEPSS rescore
  26. 2026-06-14 20:23 UTCEG score recompute
  27. 2026-06-14 20:23 UTCVendor advisory
  28. 2026-06-13 23:00 UTCEPSS rescore
  29. 2026-06-13 21:09 UTCEG score recompute
  30. 2026-06-12 23:12 UTCEPSS rescore
  31. 2026-06-12 23:12 UTCEPSS rescore
  32. 2026-06-12 16:50 UTCEG score recompute
  33. 2026-06-12 16:50 UTCVendor advisory
  34. 2026-06-11 17:35 UTCEG score recompute
  35. 2026-06-11 17:35 UTCVendor advisory
  36. 2026-06-11 14:00 UTCEPSS rescore
  37. 2026-06-10 22:18 UTCEPSS rescore
  38. 2026-06-10 18:21 UTCEG score recompute
  39. 2026-06-10 18:21 UTCVendor advisory
  40. 2026-06-10 13:22 UTCEPSS rescore
  41. 2026-06-10 13:22 UTCEPSS rescore
  42. 2026-06-09 19:07 UTCEG score recompute
  43. 2026-06-09 19:07 UTCVendor advisory
  44. 2026-06-09 02:00 UTCNVD updateCVSS v3 → 6.1
  45. 2026-06-08 23:40 UTCMITRE cvelistV5CVSS v3 → 5.3
  46. 2026-06-08 19:53 UTCEG score recompute
  47. 2026-06-08 19:53 UTCVendor advisory
  48. 2026-06-08 19:53 UTCGHSA enrichment
  49. 2026-06-08 14:17 UTCEPSS rescore
  50. 2026-06-08 14:17 UTCEPSS rescore
  51. 2026-06-07 20:39 UTCEG score recompute
  52. 2026-06-07 20:39 UTCVendor advisory
  53. 2026-06-07 20:39 UTCGHSA enrichment
  54. 2026-06-07 15:25 UTCEPSS rescore
  55. 2026-06-07 15:25 UTCEPSS rescore
  56. 2026-06-06 21:25 UTCEG score recompute
  57. 2026-06-06 21:25 UTCVendor advisory
  58. 2026-06-06 21:25 UTCGHSA enrichment
  59. 2026-06-06 13:47 UTCEPSS rescore
  60. 2026-06-06 13:47 UTCEPSS rescore
  61. 2026-06-05 22:47 UTCEPSS rescore
  62. 2026-06-05 22:10 UTCEG score recompute
  63. 2026-06-05 22:10 UTCVendor advisory
  64. 2026-06-05 22:10 UTCGHSA enrichment
  65. 2026-06-05 06:10 UTCEPSS rescore
  66. 2026-06-05 06:10 UTCEPSS rescore
  67. 2026-06-04 22:56 UTCEG score recompute
  68. 2026-06-04 22:56 UTCVendor advisory
  69. 2026-06-04 22:56 UTCGHSA enrichment
  70. 2026-06-04 13:12 UTCEPSS rescore
  71. 2026-06-04 13:12 UTCEPSS rescore
  72. 2026-06-03 23:42 UTCEG score recompute
  73. 2026-06-03 23:42 UTCVendor advisory
  74. 2026-06-03 23:42 UTCGHSA enrichment
  75. 2026-06-03 00:27 UTCEG score recompute

Related CVEs(same product + same vendor + same CWE)

Same product

1 shown

pip:mistune

Frequently asked(5)

What is CVE-2026-44896?
CVE-2026-44896 is a medium vulnerability published on May 26, 2026. Mistune is a Python Markdown parser with renderers and plugins. In 3.2.0 and earlier, in src/mistune/directives/image.py, the render_figure() function concatenates figclass and figwidth options directly into HTML attributes without escaping. This allows attribute injection and XSS even when…
When was CVE-2026-44896 disclosed?
CVE-2026-44896 was first published in the National Vulnerability Database on May 26, 2026, with the most recent update on June 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-44896 actively exploited?
CVE-2026-44896 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 9.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-44896?
CVE-2026-44896 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2026-44896?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-44896, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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