CVE-2026-19504

MEDIUMPre-NVD 4.04.0
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 4.0 from GitHub Security Advisory published 2026-09-15. A secondary CVSS source baseline 4.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source

Also known asEUVD-2026-79129 (ENISA EUVD) · GHSA-vc96-76vg-f8vj (GitHub Security Advisories)Source: ENISA EUVD

4.0EG
EchelonGraph verdictMonitorNo fix is confirmed yet: check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 4.0Exploit: None knownExposed services: Not assessed

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

Fabric.js loadFromJSON Server-Side Request Forgery Vulnerability. This vulnerability allows remote attackers to disclose sensitive information on affected installations of Fabric.js. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation.

The specific flaw exists within the implementation of the loadFromJSON method. The issue results from the lack of proper validation of a URI prior to accessing resources. An attacker may be able to leverage this vulnerability to gain improper access to network resources. Was ZDI-CAN-29318.

CVSS v3
4.0
EG Score
4.0MEDIUMmedium confidence
EG Risk
18
EG Risk 18/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity40% × 45%
Impact severity (EG Severity): CVSS 4.0 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.1% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: No fix is confirmed yet. Check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule.
EPSS PROB
0.1%
EPSS %ILE
4th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (4.0): severity, escalated by confirmed exploitation. This CVE's 4.0 is its impact severity (EG Severity), not escalated.

EG Severity
4.0 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.1% within 30 daysSource: FIRST EPSS. FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

No fix is confirmed yet. Check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

September 15, 2026

Last Modified

September 18, 2026

Advisory Details (1)

Auto-updated Sep 15, 2026
No fix on record yet.
Web page

ZDI-26-588 - TrendAI™ Zero Day Initiative™ (ZDI)

https://www.zerodayinitiative.com/advisories/ZDI-26-588/

Vendor Advisories for CVE-2026-19504(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 7× in last 7d / 47× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

  1. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  2. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  3. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  4. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  5. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  6. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  7. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  8. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  9. 2026-10-25 14:44 UTCEG score recompute
  10. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  11. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  12. 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  13. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  14. 2026-10-18 03:58 UTCEG score recompute
  15. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  16. 2026-10-15 23:44 UTCEG score recompute
  17. 2026-10-15 23:43 UTCGHSA enrichmentGHSA-vc96-76vg-f8vj · GitHub CVSS 4.0
  18. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  19. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  20. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  21. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  22. 2026-10-12 16:25 UTCEG score recompute
  23. 2026-10-11 20:06 UTCEG score recompute
  24. 2026-10-11 17:19 UTCEG score recompute
  25. 2026-10-11 15:14 UTCGHSA enrichmentGHSA-vc96-76vg-f8vj · GitHub CVSS 4.0
Show 67 more
  1. 2026-10-11 14:51 UTCEG score recompute
  2. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  3. 2026-10-10 17:36 UTCEG score recompute
  4. 2026-10-10 17:36 UTCGHSA enrichmentGHSA-vc96-76vg-f8vj · GitHub CVSS 4.0
  5. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  6. 2026-10-09 19:52 UTCGHSA enrichmentGHSA-vc96-76vg-f8vj · GitHub CVSS 4.0
  7. 2026-10-08 22:15 UTCEG score recompute
  8. 2026-10-08 22:15 UTCGHSA enrichmentGHSA-vc96-76vg-f8vj · GitHub CVSS 4.0
  9. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  10. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  11. 2026-10-07 18:51 UTCGHSA enrichmentGHSA-vc96-76vg-f8vj · GitHub CVSS 4.0
  12. 2026-10-06 20:23 UTCEG score recompute
  13. 2026-10-06 20:23 UTCGHSA enrichmentGHSA-vc96-76vg-f8vj · GitHub CVSS 4.0
  14. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  15. 2026-10-05 22:46 UTCEG score recompute
  16. 2026-10-05 22:46 UTCGHSA enrichmentGHSA-vc96-76vg-f8vj · GitHub CVSS 4.0
  17. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  18. 2026-10-05 01:07 UTCEG score recompute
  19. 2026-10-05 01:07 UTCGHSA enrichmentGHSA-vc96-76vg-f8vj · GitHub CVSS 4.0
  20. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  21. 2026-10-04 03:13 UTCEG score recompute
  22. 2026-10-04 03:13 UTCGHSA enrichmentGHSA-vc96-76vg-f8vj · GitHub CVSS 4.0
  23. 2026-10-03 05:37 UTCEG score recompute
  24. 2026-10-03 05:37 UTCGHSA enrichmentGHSA-vc96-76vg-f8vj · GitHub CVSS 4.0
  25. 2026-10-02 08:00 UTCEG score recompute
  26. 2026-10-02 08:00 UTCGHSA enrichmentGHSA-vc96-76vg-f8vj · GitHub CVSS 4.0
  27. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  28. 2026-10-01 10:23 UTCEG score recompute
  29. 2026-10-01 10:23 UTCGHSA enrichmentGHSA-vc96-76vg-f8vj · GitHub CVSS 4.0
  30. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  31. 2026-09-30 12:47 UTCGHSA enrichmentGHSA-vc96-76vg-f8vj · GitHub CVSS 4.0
  32. 2026-09-29 14:50 UTCEG score recompute
  33. 2026-09-29 14:50 UTCGHSA enrichmentGHSA-vc96-76vg-f8vj · GitHub CVSS 4.0
  34. 2026-09-28 17:07 UTCEG score recompute
  35. 2026-09-28 17:07 UTCGHSA enrichmentGHSA-vc96-76vg-f8vj · GitHub CVSS 4.0
  36. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  37. 2026-09-27 19:27 UTCEG score recompute
  38. 2026-09-27 19:27 UTCGHSA enrichmentGHSA-vc96-76vg-f8vj · GitHub CVSS 4.0
  39. 2026-09-27 13:47 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  40. 2026-09-26 21:48 UTCEG score recompute
  41. 2026-09-26 21:48 UTCGHSA enrichmentGHSA-vc96-76vg-f8vj · GitHub CVSS 4.0
  42. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  43. 2026-09-26 00:12 UTCGHSA enrichmentGHSA-vc96-76vg-f8vj · GitHub CVSS 4.0
  44. 2026-09-25 02:33 UTCEG score recompute
  45. 2026-09-25 02:33 UTCGHSA enrichmentGHSA-vc96-76vg-f8vj · GitHub CVSS 4.0
  46. 2026-09-24 04:55 UTCEG score recompute
  47. 2026-09-24 04:55 UTCGHSA enrichmentGHSA-vc96-76vg-f8vj · GitHub CVSS 4.0
  48. 2026-09-23 07:19 UTCEG score recompute
  49. 2026-09-23 07:19 UTCGHSA enrichmentGHSA-vc96-76vg-f8vj · GitHub CVSS 4.0
  50. 2026-09-22 09:42 UTCEG score recompute
  51. 2026-09-22 09:42 UTCGHSA enrichmentGHSA-vc96-76vg-f8vj · GitHub CVSS 4.0
  52. 2026-09-21 12:05 UTCGHSA enrichmentGHSA-vc96-76vg-f8vj · GitHub CVSS 4.0
  53. 2026-09-20 14:28 UTCGHSA enrichmentGHSA-vc96-76vg-f8vj · GitHub CVSS 4.0
  54. 2026-09-19 16:52 UTCEG score recompute
  55. 2026-09-19 16:51 UTCGHSA enrichmentGHSA-vc96-76vg-f8vj · GitHub CVSS 4.0
  56. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  57. 2026-09-18 19:14 UTCGHSA enrichmentGHSA-vc96-76vg-f8vj · GitHub CVSS 4.0
  58. 2026-09-18 13:33 UTCEG score recompute
  59. 2026-09-18 13:33 UTCGHSA enrichmentGHSA-vc96-76vg-f8vj · GitHub CVSS 4.0
  60. 2026-09-17 15:56 UTCGHSA enrichmentGHSA-vc96-76vg-f8vj · GitHub CVSS 4.0
  61. 2026-09-16 18:19 UTCEG score recompute
  62. 2026-09-16 18:19 UTCGHSA enrichmentGHSA-vc96-76vg-f8vj · GitHub CVSS 4.0
  63. 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  64. 2026-09-15 20:42 UTCEG score recompute
  65. 2026-09-15 19:23 UTCEG score recompute
  66. 2026-09-15 18:23 UTCEG score recomputeFirst assessed: 4.0 MEDIUM
  67. 2026-09-15 18:22 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-19504?
CVE-2026-19504 is a medium-severity vulnerability; its CVE record was published on September 15, 2026. Fabric.js loadFromJSON Server-Side Request Forgery Vulnerability. This vulnerability allows remote attackers to disclose sensitive information on affected installations of Fabric.js. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the…
When was CVE-2026-19504 made public?
CVE-2026-19504 was made public on August 24, 2026: that is the date its CVE record's CNA, Zero Day Initiative, gives for when the vulnerability was made public. The CVE record itself was published on September 15, 2026. EchelonGraph's copy of the record carries a last-modified date of September 18, 2026; the record at its source may have been updated since.
Is CVE-2026-19504 actively exploited?
CVE-2026-19504 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (4th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-19504?
CVE-2026-19504 has a CVSS base score of 4.0 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-19504?
No fix for CVE-2026-19504 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-2026-19504 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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