CVE-2026-40509

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

Score 4.3 from GitHub Security Advisory published 2026-08-19. The CNA's CVSS baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Trending — 3 sources updated this week
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 4.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

OpenEMR before 8.3.0 contains a cross-site request forgery vulnerability in the DICOM viewer. The web_path GET parameter in the DICOM viewer page is embedded unsanitized as a URL without validation against expected path formats. An attacker can craft a URL that causes an authenticated user with Patients - Documents permissions to make authenticated requests to arbitrary OpenEMR endpoints, enabling forced logout and other state-changing actions.

CVSS v3
4.3
EG Score
4.3MEDIUMmedium confidence
EG Risk
34
EG Risk 34/100CISA 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
Severity43% × 45%
Exploitation0% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.2%
EPSS %ILE
7th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (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 19, 2026

Last Modified

October 1, 2026

Advisory Details (4)

Auto-updated Aug 19, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github, github_release.
generic

OpenEMR < 8.3.0 CSRF via DICOM Viewer web_path Parameter | Advisories | VulnCheck

https://www.vulncheck.com/advisories/openemr-csrf-via-dicom-viewer-web-path-parameter
github_commit Patch Available

commit f760adc7bdda (openemr/openemr)

Patch available: openemr/openemr v8_3_0 (contains commit f760adc7bdda)

https://github.com/openemr/openemr/commit/f760adc7bddaf9d118e1a0d40590e686783ed21b
github_release Patch Available

OpenEMR 8.3.0

Patch available: openemr/openemr v8_3_0

https://github.com/openemr/openemr/releases/tag/v8_3_0
github Patch Available🟡 PoC Available

/library/dicom_frame.php web_path Cross-Site Request Forgery · Advisory · openemr/openemr · GitHub

https://github.com/openemr/openemr/security/advisories/GHSA-wffp-pj5h-xqwp

Vendor Advisories for CVE-2026-40509(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 17× in last 7d / 76× 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 127 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-40509?
CVE-2026-40509 is a medium vulnerability published on August 19, 2026. OpenEMR before 8.3.0 contains a cross-site request forgery vulnerability in the DICOM viewer. The web_path GET parameter in the DICOM viewer page is embedded unsanitized as a URL without validation against expected path formats. An attacker can craft a URL that causes an authenticated user with…
When was CVE-2026-40509 disclosed?
CVE-2026-40509 was first published on August 19, 2026, with the most recent update on October 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-40509 actively exploited?
CVE-2026-40509 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (7th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-40509?
CVE-2026-40509 has a CVSS base score of 4.3 (the CNA's own assessment, by vulncheck; NVD's own analysis pending).
How do I remediate CVE-2026-40509?
A fix for CVE-2026-40509 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-40509 are linked in the Vendor Advisories panel on this page.

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