CVE-2026-86666

HIGHPre-NVD 7.37.3—
EchelonGraph scoreHIGH confidence

Score 7.3 from GitHub Security Advisory published 2026-09-08. a secondary CVSS source baseline 7.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
7.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.3Exploit: Elevated riskExposed: 0

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

A security flaw has been discovered in aircheng-org iWebShop-5 up to 5.15. Impacted is the function upload_json/uploadFile of the file controllers/pic.php. The manipulation results in unrestricted upload. The attack can be executed remotely. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.

CVSS v3
7.3
EG Score
7.3(high)
EG Risk
64(Attend)
EG Risk 64/100SSVC: 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
Severity73% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
42%
KEV
Not listed

Published

September 8, 2026

Last Modified

September 10, 2026

Advisory Details (2)

Auto-updated Sep 8, 2026
No patch confirmed yet.
generic

GitHub - aircheng-org/iWebShop-5: iWebShop是一款基于PHP语言及MYSQL数据库开发的B2B2C多用户商城系统，支持自营和多商家入驻、集成微信商城、手机商城、移动端APP商城、三级分销、电商直播、微信小程序，它可以承载大数据量且性能优良，代码支持二次开发是电商建站首选。 · GitHub

https://github.com/aircheng-org/iWebShop-5/
generic

Unauthenticated unrestricted file upload via `pic/upload_json` and `pic/uploadFile` · Issue #3 · aircheng-org/iWebShop-5 · GitHub

https://github.com/aircheng-org/iWebShop-5/issues/3

Vendor Advisories for CVE-2026-86666(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 27× in last 7d / 54× 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. 2026-09-20 07:08 UTCGHSA enrichment
  2. 2026-09-19 19:52 UTCEG score recompute
  3. 2026-09-19 19:52 UTCGHSA enrichment
  4. 2026-09-19 08:53 UTCGHSA enrichment
  5. 2026-09-18 21:52 UTCEG score recompute
  6. 2026-09-18 21:52 UTCGHSA enrichment
  7. 2026-09-18 19:28 UTCEPSS rescore
  8. 2026-09-18 10:54 UTCGHSA enrichment
  9. 2026-09-17 23:55 UTCEG score recompute
  10. 2026-09-17 23:55 UTCGHSA enrichment
  11. 2026-09-17 19:32 UTCEPSS rescore
  12. 2026-09-17 12:20 UTCGHSA enrichment
  13. 2026-09-17 01:21 UTCGHSA enrichment
  14. 2026-09-16 14:22 UTCEG score recompute
  15. 2026-09-16 14:22 UTCGHSA enrichment
  16. 2026-09-16 14:09 UTCEPSS rescore
  17. 2026-09-16 05:15 UTCEPSS rescore
  18. 2026-09-16 03:23 UTCGHSA enrichment
  19. 2026-09-15 16:21 UTCGHSA enrichment
  20. 2026-09-15 05:22 UTCEG score recompute
  21. 2026-09-15 05:22 UTCGHSA enrichment
  22. 2026-09-15 03:12 UTCEPSS rescore
  23. 2026-09-15 03:12 UTCEPSS rescore
  24. 2026-09-14 18:20 UTCGHSA enrichment
  25. 2026-09-14 06:35 UTCGHSA enrichment
Show 29 more
  1. 2026-09-13 19:37 UTCEG score recompute
  2. 2026-09-13 19:37 UTCGHSA enrichment
  3. 2026-09-13 08:38 UTCGHSA enrichment
  4. 2026-09-12 21:39 UTCEG score recompute
  5. 2026-09-12 21:39 UTCGHSA enrichment
  6. 2026-09-12 10:40 UTCGHSA enrichment
  7. 2026-09-11 23:42 UTCEG score recompute
  8. 2026-09-11 23:42 UTCGHSA enrichment
  9. 2026-09-11 14:53 UTCEPSS rescore
  10. 2026-09-11 14:53 UTCEPSS rescore
  11. 2026-09-11 12:43 UTCEG score recompute
  12. 2026-09-11 12:43 UTCGHSA enrichment
  13. 2026-09-11 01:21 UTCEG score recompute
  14. 2026-09-11 01:21 UTCGHSA enrichment
  15. 2026-09-10 14:22 UTCEG score recompute
  16. 2026-09-10 14:22 UTCGHSA enrichment
  17. 2026-09-10 14:19 UTCNVD updateCVSS v4 → 5.5
  18. 2026-09-10 14:07 UTCEG score recompute
  19. 2026-09-10 14:06 UTCGHSA enrichment
  20. 2026-09-10 14:04 UTCMITRE cvelistV5CVSS v4 → 6.9
  21. 2026-09-10 04:46 UTCGHSA enrichment
  22. 2026-09-09 17:47 UTCGHSA enrichment
  23. 2026-09-09 06:48 UTCGHSA enrichment
  24. 2026-09-08 19:49 UTCEG score recompute
  25. 2026-09-08 19:49 UTCGHSA enrichment
  26. 2026-09-08 16:38 UTCEG score recompute
  27. 2026-09-08 16:28 UTCNVD updateCVSS v4 → 5.5
  28. 2026-09-08 16:07 UTCEG score recompute
  29. 2026-09-08 16:04 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-86666?
CVE-2026-86666 is a high vulnerability published on September 8, 2026. A security flaw has been discovered in aircheng-org iWebShop-5 up to 5.15. Impacted is the function upload_json/uploadFile of the file controllers/pic.php. The manipulation results in unrestricted upload. The attack can be executed remotely. The exploit has been released to the public and may be…
When was CVE-2026-86666 disclosed?
CVE-2026-86666 was first published in the National Vulnerability Database on September 8, 2026, with the most recent update on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-86666 actively exploited?
CVE-2026-86666 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 58.1% of all scored CVEs.
What is the CVSS score of CVE-2026-86666?
CVE-2026-86666 has a CVSS v3 base score of 7.3 (NVD).
How do I remediate CVE-2026-86666?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-86666, 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-2026-86666

Explore →

Is Your Infrastructure Affected by CVE-2026-86666?

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

Start Free Scan →Browse All CVEs