CVE-2026-18412

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreHIGH confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-10. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.1Exploit: None knownExposed: 0

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

OpenCart extensions are uploaded as zip files with .ocmod.zip extensions. Upon installation, the OpenCart v4.2.0.0 extension installer extracts these zip files, but does not validate that the extracted paths stay inside the intended extraction directory. An attacker can craft a malicious extension containing file path traversal sequences, such as ../. With this vulnerability, an attacker can write files, such as a PHP web shell, into the webroot directory.

CVSS v3
9.1
EG Score
9.1(high)
EG Risk
56(Track)
EG Risk 56/100SSVC: Track

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
Severity91% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
28%
KEV
Not listed

Published

August 10, 2026

Last Modified

August 12, 2026

Advisory Details (1)

Auto-updated Aug 12, 2026
No patch confirmed yet. Sources: cert.
cert

VU#614868 - Opencart ecommerce platform contains directory traversal vulnerability

https://kb.cert.org/vuls/id/614868

Vendor Advisories for CVE-2026-18412(1)

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

Data Freshness Timeline

(refreshed 51× in last 7d / 75× 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. 2026-08-21 01:36 UTCEG score recompute
  2. 2026-08-21 01:36 UTCGHSA enrichment
  3. 2026-08-20 22:55 UTCEPSS rescore
  4. 2026-08-20 21:12 UTCGHSA enrichment
  5. 2026-08-20 16:48 UTCGHSA enrichment
  6. 2026-08-20 12:19 UTCGHSA enrichment
  7. 2026-08-20 07:55 UTCGHSA enrichment
  8. 2026-08-20 03:32 UTCGHSA enrichment
  9. 2026-08-19 23:08 UTCGHSA enrichment
  10. 2026-08-19 18:44 UTCEG score recompute
  11. 2026-08-19 18:44 UTCGHSA enrichment
  12. 2026-08-19 17:03 UTCEPSS rescore
  13. 2026-08-19 13:25 UTCGHSA enrichment
  14. 2026-08-19 08:57 UTCGHSA enrichment
  15. 2026-08-19 04:33 UTCGHSA enrichment
  16. 2026-08-19 00:10 UTCGHSA enrichment
  17. 2026-08-18 19:43 UTCGHSA enrichment
  18. 2026-08-18 15:18 UTCEG score recompute
  19. 2026-08-18 15:18 UTCGHSA enrichment
  20. 2026-08-18 13:48 UTCEPSS rescore
  21. 2026-08-18 09:46 UTCGHSA enrichment
  22. 2026-08-18 05:22 UTCGHSA enrichment
  23. 2026-08-18 00:56 UTCGHSA enrichment
  24. 2026-08-17 20:32 UTCGHSA enrichment
  25. 2026-08-17 16:08 UTCEG score recompute
Show 50 more
  1. 2026-08-17 16:08 UTCGHSA enrichment
  2. 2026-08-17 13:47 UTCEPSS rescore
  3. 2026-08-17 11:44 UTCGHSA enrichment
  4. 2026-08-17 07:13 UTCGHSA enrichment
  5. 2026-08-17 02:50 UTCGHSA enrichment
  6. 2026-08-16 22:26 UTCGHSA enrichment
  7. 2026-08-16 18:02 UTCEG score recompute
  8. 2026-08-16 18:02 UTCGHSA enrichment
  9. 2026-08-16 14:56 UTCEPSS rescore
  10. 2026-08-16 13:38 UTCGHSA enrichment
  11. 2026-08-16 09:14 UTCGHSA enrichment
  12. 2026-08-16 04:51 UTCEG score recompute
  13. 2026-08-16 04:51 UTCGHSA enrichment
  14. 2026-08-16 02:14 UTCEPSS rescore
  15. 2026-08-16 00:28 UTCGHSA enrichment
  16. 2026-08-15 20:04 UTCGHSA enrichment
  17. 2026-08-15 15:40 UTCGHSA enrichment
  18. 2026-08-15 11:16 UTCGHSA enrichment
  19. 2026-08-15 06:52 UTCGHSA enrichment
  20. 2026-08-15 01:44 UTCEG score recompute
  21. 2026-08-15 01:44 UTCGHSA enrichment
  22. 2026-08-15 01:30 UTCEPSS rescore
  23. 2026-08-14 21:20 UTCGHSA enrichment
  24. 2026-08-14 16:55 UTCGHSA enrichment
  25. 2026-08-14 12:31 UTCGHSA enrichment
  26. 2026-08-14 08:08 UTCGHSA enrichment
  27. 2026-08-14 03:44 UTCGHSA enrichment
  28. 2026-08-13 23:21 UTCEG score recompute
  29. 2026-08-13 23:21 UTCGHSA enrichment
  30. 2026-08-13 22:00 UTCEPSS rescore
  31. 2026-08-13 18:57 UTCGHSA enrichment
  32. 2026-08-13 14:33 UTCGHSA enrichment
  33. 2026-08-13 10:10 UTCGHSA enrichment
  34. 2026-08-13 05:46 UTCGHSA enrichment
  35. 2026-08-13 01:22 UTCGHSA enrichment
  36. 2026-08-12 20:59 UTCEG score recompute
  37. 2026-08-12 20:59 UTCGHSA enrichment
  38. 2026-08-12 16:35 UTCGHSA enrichment
  39. 2026-08-12 16:01 UTCEG score recompute▲ 9.10
  40. 2026-08-12 16:01 UTCGHSA enrichment
  41. 2026-08-12 16:00 UTCMITRE cvelistV5CVSS v3 → 9.1 · severity → CRITICAL
  42. 2026-08-12 13:50 UTCEPSS rescore
  43. 2026-08-11 13:42 UTCEPSS rescore
  44. 2026-08-10 17:22 UTCGHSA enrichment
  45. 2026-08-10 17:21 UTCNVD update
  46. 2026-08-10 16:30 UTCGHSA enrichment
  47. 2026-08-10 16:29 UTCMITRE cvelistV5
  48. 2026-08-10 15:28 UTCNVD update
  49. 2026-08-10 15:00 UTCEG score recompute
  50. 2026-08-10 14:59 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-18412?
CVE-2026-18412 is a critical vulnerability published on August 10, 2026. OpenCart extensions are uploaded as zip files with .ocmod.zip extensions. Upon installation, the OpenCart v4.2.0.0 extension installer extracts these zip files, but does not validate that the extracted paths stay inside the intended extraction directory. An attacker can craft a malicious extension…
When was CVE-2026-18412 disclosed?
CVE-2026-18412 was first published in the National Vulnerability Database on August 10, 2026, with the most recent update on August 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18412 actively exploited?
CVE-2026-18412 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 71.8% of all scored CVEs.
What is the CVSS score of CVE-2026-18412?
CVE-2026-18412 has a CVSS v3.1 base score of 9.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-18412?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-18412, 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

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