CVE-2026-50873

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-15. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this weekElevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: Elevated riskExposed: 0

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

An arbitrary file upload vulnerability in the attachment handling component of flatnotes v5.5.4 allows attackers to execute arbitrary code via uploading a crafted HTML or SVG file.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
75(Attend)
EG Risk 75/100SSVC: Attend

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
Severity98% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
36%
KEV
Not listed

Published

June 15, 2026

Last Modified

June 16, 2026

Advisory Details (1)

Auto-updated Jul 26, 2026
No patch confirmed yet.
generic

Reference for CVE-2026-50873 · GitHub

https://gist.github.com/pyuysig/ab0af5b10877fb906941e05a69b202a7

Vendor Advisories for CVE-2026-50873(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 16× in last 7d / 129× 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 207 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-50873?
CVE-2026-50873 is a critical vulnerability published on June 15, 2026. An arbitrary file upload vulnerability in the attachment handling component of flatnotes v5.5.4 allows attackers to execute arbitrary code via uploading a crafted HTML or SVG file.
When was CVE-2026-50873 disclosed?
CVE-2026-50873 was first published in the National Vulnerability Database on June 15, 2026, with the most recent update on June 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-50873 actively exploited?
CVE-2026-50873 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 63.9% of all scored CVEs.
What is the CVSS score of CVE-2026-50873?
CVE-2026-50873 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-50873?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-50873, 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

Explore the affected products and dependency analysis for CVE-2026-50873

Explore →

Is Your Infrastructure Affected by CVE-2026-50873?

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

Start Free Scan →Browse All CVEs