CVE-2026-54390

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-18. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.8Exploit: NoneExposed: 0

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

JTL Shop versions 5.2.0 through 5.7.1 contains a server-side template injection vulnerability that allows unauthenticated attackers to inject malicious template syntax due to unsanitized user-supplied input passed to the Smarty template engine. Attackers can exploit this flaw to read sensitive server-side values such as database credentials and encryption keys, and on versions 5.4.0 through 5.7.1, leverage registered Smarty modifiers including unserialize and file_get_contents to write a webshell to the web root and execute arbitrary commands as the web server user.

CVSS v3
9.8
EG Score
9.8(high)
EPSS
25.3%
KEV
Not listed

Published

June 18, 2026

Last Modified

June 23, 2026

Advisory Details (3)

Auto-updated Jul 1, 2026
No patch confirmed yet.
generic

JTL Shop < 5.7.2 Server-Side Template Injection via Smarty Renderer | Advisories | VulnCheck

https://www.vulncheck.com/advisories/jtl-shop-server-side-template-injection-via-smarty-renderer
generic

Unauthenticated remote code execution in JTL Shop | Sansec

https://sansec.io/research/jtl-shop-ssti-rce
generic

Neu - JTL-Shop 5.7 - Aktuell 5.7.2 | Supportforum für JTL-Wawi, JTL-Shop, JTL-POS, JTL-WMS, JTL-eazyAuction und JTL-Connectoren von JTL-Software

https://forum.jtl-software.de/threads/jtl-shop-5-7-aktuell-5-7-2.246278/

Vendor Advisories for CVE-2026-54390(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 92× in last 7d / 241× 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 241 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-54390?
CVE-2026-54390 is a critical vulnerability published on June 18, 2026. JTL Shop versions 5.2.0 through 5.7.1 contains a server-side template injection vulnerability that allows unauthenticated attackers to inject malicious template syntax due to unsanitized user-supplied input passed to the Smarty template engine. Attackers can exploit this flaw to read sensitive…
When was CVE-2026-54390 disclosed?
CVE-2026-54390 was first published in the National Vulnerability Database on June 18, 2026, with the most recent update on June 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-54390 actively exploited?
CVE-2026-54390 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 25.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-54390?
CVE-2026-54390 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-54390?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54390, 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-2026-54390

Explore →

Is Your Infrastructure Affected by CVE-2026-54390?

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

Start Free Scan →Browse All CVEs