CVE-2026-100747

MEDIUMNVD 6.56.5
EchelonGraph scoreMEDIUM confidence

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

Score 6.5 from GitHub Security Advisory (severity: MODERATE) published 2026-09-27. NVD baseline CVSS 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3

Also known asEUVD-2026-87930 (ENISA EUVD) · GHSA-cgxg-f4wg-xm8f (GitHub Security Advisories)Source: ENISA EUVD

6.5EG
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: 6.5Exploit: None knownExposed services: Not assessed

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

The CVE record's description, written by its CNA (Joomla! Project), states the affected versions: "Joomla Extension - svenbluege.de - CSRF in image upload in Event Gallery extension < 6.5.0 - Due to lack of an CSRF token check, a third-party site can upload files to an event and overwrite existing files with the same…" No release containing a fix is confirmed on record.

Joomla Extension - svenbluege.de - CSRF in image upload in Event Gallery extension < 6.5.0 - Due to lack of an CSRF token check, a third-party site can upload files to an event and overwrite existing files with the same name.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
29
EG Risk 29/100

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)
Severity65% × 45%
Impact severity (EG Severity): CVSS 6.5 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
1st
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 (6.5): severity, escalated by confirmed exploitation. This CVE's 6.5 is its impact severity (EG Severity), not escalated.

EG Severity
6.5 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 (model v2026.06.15, score date 2026-11-07). 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 27, 2026

Last Modified

October 20, 2026

Advisory Details (1)

Auto-updated Sep 27, 2026
No fix on record yet.
Web page

Event Gallery - A gallery component for Joomla!

https://www.svenbluege.de/

Vendor Advisories for CVE-2026-100747(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 6× in last 7d / 31× 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 its CVE.org record (CNA or CISA ADP). 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

  1. 2026-11-12 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  2. 2026-11-11 16:37 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  3. 2026-11-10 16:41 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  4. 2026-11-08 16:37 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  5. 2026-11-07 19:52 UTCGHSA enrichmentGHSA-cgxg-f4wg-xm8f · GitHub severity MODERATE · GitHub CVSS 6.5
  6. 2026-11-07 19:52 UTCEchelonGraph re-scored
  7. 2026-11-07 16:37 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  8. 2026-11-05 16:36 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  9. 2026-11-04 16:34 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  10. 2026-11-03 16:45 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  11. 2026-11-02 16:43 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  12. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  13. 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  14. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  15. 2026-10-29 14:47 UTCEchelonGraph re-scored
  16. 2026-10-29 14:47 UTCGHSA enrichmentGHSA-cgxg-f4wg-xm8f · GitHub CVSS 6.5
  17. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  18. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  19. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  20. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  21. 2026-10-25 15:58 UTCEchelonGraph re-scored
  22. 2026-10-24 16:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  23. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  24. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  25. 2026-10-21 16:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
Show 69 more
  1. 2026-10-20 20:26 UTCEchelonGraph re-scored▲ 1.40
  2. 2026-10-20 20:26 UTCGHSA enrichmentGHSA-cgxg-f4wg-xm8f
  3. 2026-10-20 20:25 UTCNVD updateCVSS v3 → 6.5
  4. 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  5. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  6. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  7. 2026-10-18 05:11 UTCEchelonGraph re-scored
  8. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  9. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  10. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  11. 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  12. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  13. 2026-10-12 16:41 UTCEchelonGraph re-scored
  14. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  15. 2026-10-12 00:47 UTCGHSA enrichmentGHSA-cgxg-f4wg-xm8f
  16. 2026-10-11 20:16 UTCEchelonGraph re-scored
  17. 2026-10-11 18:29 UTCEchelonGraph re-scored
  18. 2026-10-11 15:02 UTCEchelonGraph re-scored
  19. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  20. 2026-10-11 01:53 UTCEchelonGraph re-scored
  21. 2026-10-11 01:53 UTCGHSA enrichmentGHSA-cgxg-f4wg-xm8f
  22. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  23. 2026-10-10 03:02 UTCEchelonGraph re-scored
  24. 2026-10-10 03:02 UTCGHSA enrichmentGHSA-cgxg-f4wg-xm8f
  25. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  26. 2026-10-09 04:17 UTCEchelonGraph re-scored
  27. 2026-10-09 04:17 UTCGHSA enrichmentGHSA-cgxg-f4wg-xm8f
  28. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  29. 2026-10-08 05:32 UTCEchelonGraph re-scored
  30. 2026-10-08 05:32 UTCGHSA enrichmentGHSA-cgxg-f4wg-xm8f
  31. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  32. 2026-10-07 06:48 UTCEchelonGraph re-scored
  33. 2026-10-07 06:48 UTCGHSA enrichmentGHSA-cgxg-f4wg-xm8f
  34. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  35. 2026-10-06 08:04 UTCEchelonGraph re-scored
  36. 2026-10-06 08:04 UTCGHSA enrichmentGHSA-cgxg-f4wg-xm8f
  37. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  38. 2026-10-05 09:20 UTCEchelonGraph re-scored
  39. 2026-10-05 09:20 UTCGHSA enrichmentGHSA-cgxg-f4wg-xm8f
  40. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  41. 2026-10-04 10:34 UTCEchelonGraph re-scored
  42. 2026-10-04 10:33 UTCGHSA enrichmentGHSA-cgxg-f4wg-xm8f
  43. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  44. 2026-10-03 11:47 UTCEchelonGraph re-scored
  45. 2026-10-03 11:47 UTCGHSA enrichmentGHSA-cgxg-f4wg-xm8f
  46. 2026-10-02 12:58 UTCEchelonGraph re-scored
  47. 2026-10-02 12:58 UTCGHSA enrichmentGHSA-cgxg-f4wg-xm8f
  48. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  49. 2026-10-01 14:14 UTCGHSA enrichmentGHSA-cgxg-f4wg-xm8f
  50. 2026-09-30 15:31 UTCEchelonGraph re-scored
  51. 2026-09-30 15:30 UTCGHSA enrichmentGHSA-cgxg-f4wg-xm8f
  52. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  53. 2026-09-30 14:53 UTCEchelonGraph re-scored
  54. 2026-09-30 14:53 UTCGHSA enrichmentGHSA-cgxg-f4wg-xm8f
  55. 2026-09-30 11:19 UTCEchelonGraph re-scored
  56. 2026-09-30 11:19 UTCGHSA enrichmentGHSA-cgxg-f4wg-xm8f
  57. 2026-09-30 11:13 UTCEchelonGraph re-scored
  58. 2026-09-30 11:13 UTCGHSA enrichmentGHSA-cgxg-f4wg-xm8f
  59. 2026-09-29 22:13 UTCEchelonGraph re-scored
  60. 2026-09-29 22:12 UTCGHSA enrichmentGHSA-cgxg-f4wg-xm8f
  61. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  62. 2026-09-29 10:03 UTCEchelonGraph re-scored
  63. 2026-09-29 10:02 UTCGHSA enrichmentGHSA-cgxg-f4wg-xm8f
  64. 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  65. 2026-09-28 11:15 UTCGHSA enrichmentGHSA-cgxg-f4wg-xm8f
  66. 2026-09-27 12:31 UTCEchelonGraph re-scored
  67. 2026-09-27 12:31 UTCGHSA enrichmentGHSA-cgxg-f4wg-xm8f
  68. 2026-09-27 11:57 UTCEchelonGraph re-scoredFirst assessed: 5.1 MEDIUM
  69. 2026-09-27 11:56 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-100747?
CVE-2026-100747 is a medium-severity vulnerability; its CVE record was published on September 27, 2026. Joomla Extension - svenbluege.de - CSRF in image upload in Event Gallery extension < 6.5.0 - Due to lack of an CSRF token check, a third-party site can upload files to an event and overwrite existing files with the same name.
When was the CVE record for CVE-2026-100747 published?
The CVE record for CVE-2026-100747 was published on September 27, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 20, 2026; the record at its source may have been updated since.
Is CVE-2026-100747 actively exploited?
CVE-2026-100747 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (1st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-100747?
CVE-2026-100747 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-100747?
No fix for CVE-2026-100747 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 CVE record's description, written by its CNA (Joomla! Project), states the affected versions: "Joomla Extension - svenbluege.de - CSRF in image upload in Event Gallery extension < 6.5.0 - Due to lack of an CSRF token check, a third-party site can upload files to an event and overwrite existing files with the same…" No release containing a fix is confirmed on record. The vendor advisories EchelonGraph has for CVE-2026-100747 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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