CVE-2026-63239

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreHIGH confidence

Score 5.4 from GitHub Security Advisory published 2026-07-29. a secondary CVSS source baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.4Exploit: None knownExposed: 0

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

A hard-coded AWS IAM credentials vulnerability in Koollab LMS allowed an attacker to access shared multi-tenant S3 buckets and SQS queues, exposing sensitive data and enabling malicious content injection, job manipulation, or email interception.

CVSS v3
5.4
EG Score
5.4(high)
EG Risk
24(Track)
EG Risk 24/100SSVC: 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
Severity54% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

July 29, 2026

Last Modified

July 30, 2026

Advisory Details (1)

Auto-updated Jul 29, 2026
No patch confirmed yet.
generic

Koollab LMS - Multiple Vulnerabilities including Remote Code Execution, SQL Injection, and Authentication Bypass | Cyber Security Agency of Singapore

https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2026-094/

Vendor Advisories for CVE-2026-63239(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 18× in last 7d / 79× 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. 2026-08-28 02:59 UTCEG score recompute
  2. 2026-08-28 02:59 UTCGHSA enrichment
  3. 2026-08-27 14:25 UTCEPSS rescore
  4. 2026-08-27 02:38 UTCEG score recompute
  5. 2026-08-27 02:38 UTCGHSA enrichment
  6. 2026-08-26 14:46 UTCEPSS rescore
  7. 2026-08-26 02:17 UTCEG score recompute
  8. 2026-08-26 02:17 UTCGHSA enrichment
  9. 2026-08-25 13:49 UTCEPSS rescore
  10. 2026-08-25 01:56 UTCEG score recompute
  11. 2026-08-25 01:56 UTCGHSA enrichment
  12. 2026-08-24 01:35 UTCGHSA enrichment
  13. 2026-08-23 01:15 UTCEG score recompute
  14. 2026-08-23 01:15 UTCGHSA enrichment
  15. 2026-08-23 00:19 UTCEPSS rescore
  16. 2026-08-22 00:53 UTCEG score recompute
  17. 2026-08-22 00:53 UTCGHSA enrichment
  18. 2026-08-21 23:49 UTCEPSS rescore
  19. 2026-08-21 00:31 UTCEG score recompute
  20. 2026-08-21 00:31 UTCGHSA enrichment
  21. 2026-08-20 22:55 UTCEPSS rescore
  22. 2026-08-20 00:11 UTCEG score recompute
  23. 2026-08-20 00:11 UTCGHSA enrichment
  24. 2026-08-19 17:04 UTCEPSS rescore
  25. 2026-08-18 23:49 UTCGHSA enrichment
Show 61 more
  1. 2026-08-17 23:25 UTCEG score recompute
  2. 2026-08-17 23:25 UTCGHSA enrichment
  3. 2026-08-17 13:47 UTCEPSS rescore
  4. 2026-08-16 23:04 UTCEG score recompute
  5. 2026-08-16 23:04 UTCGHSA enrichment
  6. 2026-08-16 14:56 UTCEPSS rescore
  7. 2026-08-15 22:43 UTCEG score recompute
  8. 2026-08-15 22:43 UTCGHSA enrichment
  9. 2026-08-15 01:30 UTCEPSS rescore
  10. 2026-08-14 22:22 UTCGHSA enrichment
  11. 2026-08-13 22:01 UTCEG score recompute
  12. 2026-08-13 22:01 UTCGHSA enrichment
  13. 2026-08-13 22:00 UTCEPSS rescore
  14. 2026-08-12 21:41 UTCEG score recompute
  15. 2026-08-12 21:41 UTCGHSA enrichment
  16. 2026-08-12 13:51 UTCEPSS rescore
  17. 2026-08-11 21:20 UTCEG score recompute
  18. 2026-08-11 21:20 UTCGHSA enrichment
  19. 2026-08-11 00:00 UTCEPSS rescore
  20. 2026-08-10 20:58 UTCGHSA enrichment
  21. 2026-08-09 20:37 UTCEG score recompute
  22. 2026-08-09 20:37 UTCGHSA enrichment
  23. 2026-08-09 13:47 UTCEPSS rescore
  24. 2026-08-08 20:17 UTCEG score recompute
  25. 2026-08-08 20:17 UTCGHSA enrichment
  26. 2026-08-08 16:37 UTCEPSS rescore
  27. 2026-08-07 19:56 UTCGHSA enrichment
  28. 2026-08-06 19:35 UTCEG score recompute
  29. 2026-08-06 19:35 UTCGHSA enrichment
  30. 2026-08-06 13:47 UTCEPSS rescore
  31. 2026-08-05 19:17 UTCEPSS rescore
  32. 2026-08-05 19:17 UTCEPSS rescore
  33. 2026-08-05 19:14 UTCGHSA enrichment
  34. 2026-08-04 18:53 UTCEG score recompute
  35. 2026-08-04 18:53 UTCGHSA enrichment
  36. 2026-08-04 15:10 UTCEPSS rescore
  37. 2026-08-04 10:39 UTCEPSS rescore
  38. 2026-08-03 18:32 UTCEG score recompute
  39. 2026-08-03 18:32 UTCGHSA enrichment
  40. 2026-08-03 10:36 UTCEPSS rescore
  41. 2026-08-02 18:11 UTCEG score recompute
  42. 2026-08-02 18:11 UTCGHSA enrichment
  43. 2026-08-02 02:27 UTCEPSS rescore
  44. 2026-08-01 17:50 UTCEG score recompute
  45. 2026-08-01 17:50 UTCGHSA enrichment
  46. 2026-08-01 04:16 UTCEPSS rescore
  47. 2026-07-31 17:28 UTCGHSA enrichment
  48. 2026-07-30 17:05 UTCEG score recompute
  49. 2026-07-30 17:05 UTCGHSA enrichment
  50. 2026-07-30 16:28 UTCEPSS rescore
  51. 2026-07-30 15:44 UTCEG score recompute
  52. 2026-07-30 15:44 UTCGHSA enrichment
  53. 2026-07-30 01:30 UTCEPSS rescore
  54. 2026-07-30 01:30 UTCEPSS rescore
  55. 2026-07-29 15:24 UTCEG score recompute
  56. 2026-07-29 15:23 UTCGHSA enrichment
  57. 2026-07-29 14:48 UTCEG score recompute
  58. 2026-07-29 14:48 UTCGHSA enrichment
  59. 2026-07-29 07:35 UTCEG score recompute
  60. 2026-07-29 06:39 UTCEG score recompute
  61. 2026-07-29 06:37 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-63239?
CVE-2026-63239 is a medium vulnerability published on July 29, 2026. A hard-coded AWS IAM credentials vulnerability in Koollab LMS allowed an attacker to access shared multi-tenant S3 buckets and SQS queues, exposing sensitive data and enabling malicious content injection, job manipulation, or email interception.
When was CVE-2026-63239 disclosed?
CVE-2026-63239 was first published in the National Vulnerability Database on July 29, 2026, with the most recent update on July 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-63239 actively exploited?
CVE-2026-63239 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 97.8% of all scored CVEs.
What is the CVSS score of CVE-2026-63239?
CVE-2026-63239 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-63239?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-63239, 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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