CVE-2026-48909

CRITICALPre-NVD 9.59.5—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.5 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit probability: 4.9%, top 9% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: cna:joomla, epss
Trending — 3 sources updated this weekElevated
9.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 5%CVSS: 9.5Exploit: Elevated riskExposed: 0

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

SP LMS (com_splms) < 4.1.4 by JoomShaper deserializes user-controlled cookie data without validation, enabling an unauthenticated remote attacker to execute arbitrary code on the server.

CVSS v3
9.5
EG Score
9.5(medium)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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
Severity95% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
5%
EPSS %ILE
92%
KEV
Not listed

Published

June 20, 2026

Last Modified

June 23, 2026

Advisory Details (1)

Auto-updated Aug 22, 2026
No patch confirmed yet.
generic

Responsive Joomla Templates & Premium Themes Club - JoomShaper

https://www.joomshaper.com/

Vendor Advisories for CVE-2026-48909(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 20× in last 7d / 168× 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 366 total refreshes for this CVE.

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

Publicly available exploits

(4 references)

Working exploit code is in the public domain (2 GitHub PoCs) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCCerberusMrXi/CVE-2026-48909-Joomla-SP-Exploit
    First seen Jul 15, 2026

    CVE-2026-48909 - Unauthenticated PHP Object Injection to RCE exploit for Joomla SP LMS extension versions <= 4.1.3. Exploits lmsOrders cookie deserialization to write webshell via Joomla FormattedtextLogger gadget chain. Includes interactive shell, path discovery, and cleanup. For authorized security testing only.

    Open source ↗
  • Exploit-DBEDB-52617
    First seen Jul 6, 2026

    Joomla Extension 4.1.4 - PHP Object injection

    Open source ↗
  • GitHub PoCIs4yev/CVE-2026-48909
    First seen Jun 21, 2026

    CVE-2026-48909 PoC

    Open source ↗
  • Nucleijavascript/cves/2026/CVE-2026-48909.yaml
    First seen Jan 1, 2026

    Joomla SP LMS <= 4.1.3 - Remote Code Execution

    Open source ↗

Frequently asked(5)

What is CVE-2026-48909?
CVE-2026-48909 is a critical vulnerability published on June 20, 2026. SP LMS (com_splms) < 4.1.4 by JoomShaper deserializes user-controlled cookie data without validation, enabling an unauthenticated remote attacker to execute arbitrary code on the server.
When was CVE-2026-48909 disclosed?
CVE-2026-48909 was first published in the National Vulnerability Database on June 20, 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-2026-48909 actively exploited?
CVE-2026-48909 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 5% probability of exploitation in the next 30 days, which ranks it in the top 8.4% of all scored CVEs.
What is the CVSS score of CVE-2026-48909?
CVE-2026-48909 has a CVSS v4.0 base score of 9.5 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-48909?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-48909, 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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