CVE-2026-45553

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 83% 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: cna:github_m, epss
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 0

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

NiceGUI is a Python-based UI framework. Prior to version 3.12.0, ui.restructured_text() renders reStructuredText server-side with Docutils without disabling file insertion directives. When a NiceGUI application passes attacker-controlled content to ui.restructured_text(), an attacker can use standard Docutils directives (include, csv-table with :file:, raw with :file:) to read local files readable by the NiceGUI server process. Applications that only pass trusted static strings to ui.restructured_text() are not affected. This issue has been patched in version 3.12.0.

CVSS v3
7.5
EG Score
7.5(medium)
EPSS
16.8%
KEV
Not listed

Published

May 18, 2026

Last Modified

June 3, 2026

Advisory Details (2)

Auto-updated Jun 6, 2026
Patch available. Sources: github, github_release.
github_release Patch Available

v3.12.0

Patch available: zauberzeug/nicegui v3.12.0

https://github.com/zauberzeug/nicegui/releases/tag/v3.12.0
github Patch Available

Local file disclosure via Docutils file insertion in ui.restructured_text() · Advisory · zauberzeug/nicegui · GitHub

https://github.com/zauberzeug/nicegui/security/advisories/GHSA-jfrm-rx66-g536

Vendor Advisories for CVE-2026-45553(1)

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

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
nicegui0.1.0 ... 3.9.0 (307 versions)3.12.0—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 50× 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.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-45553?
CVE-2026-45553 is a high vulnerability published on May 18, 2026. NiceGUI is a Python-based UI framework. Prior to version 3.12.0, ui.restructuredtext() renders reStructuredText server-side with Docutils without disabling file insertion directives. When a NiceGUI application passes attacker-controlled content to ui.restructuredtext(), an attacker can use standard…
When was CVE-2026-45553 disclosed?
CVE-2026-45553 was first published in the National Vulnerability Database on May 18, 2026, with the most recent update on June 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-45553 actively exploited?
CVE-2026-45553 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 16.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-45553?
CVE-2026-45553 has a CVSS v4.0 base score of 7.5 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-45553?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45553, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-45553

Explore →

Is Your Infrastructure Affected by CVE-2026-45553?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs