CVE-2026-38447

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-03. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: None knownExposed: 0

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

osTicket 1.18.3 generates API keys using a predictable construction based on MD5 hashing. The use of MD5, combined with predictable inputs such as the current timestamp and client IP address, significantly reduces entropy. An attacker can approximate the key generation time and brute-force the key space within a feasible time window.

CVSS v3
9.8
EG Score
9.8(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
Severity98% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
39%
KEV
Not listed

Published

August 3, 2026

Last Modified

August 31, 2026

Advisory Details (4)

Auto-updated Sep 14, 2026
Patch available. Sources: github_commit.
github_commit Patch Available

commit feccb6a3a908 (osTicket/osTicket)

Patch available: osTicket/osTicket v1.17.8 (contains commit feccb6a3a908)

https://github.com/osTicket/osTicket/commit/feccb6a3a90863fd31215ee738b39762177e658c
generic

osTicket/include/class.misc.php at v1.18.3 · osTicket/osTicket · GitHub

https://github.com/osTicket/osTicket/blob/v1.18.3/include/class.misc.php
generic

osTicket/include/class.api.php at v1.18.3 · osTicket/osTicket · GitHub

https://github.com/osTicket/osTicket/blob/v1.18.3/include/class.api.php#L149
generic

cve-disclosures/osTicket/CVE-2026-38447.md at master · fr3akhacks/cve-disclosures · GitHub

https://github.com/fr3akhacks/cve-disclosures/blob/master/osTicket/CVE-2026-38447.md

Vendor Advisories for CVE-2026-38447(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 44× in last 7d / 174× 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 305 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-38447?
CVE-2026-38447 is a critical vulnerability published on August 3, 2026. osTicket 1.18.3 generates API keys using a predictable construction based on MD5 hashing. The use of MD5, combined with predictable inputs such as the current timestamp and client IP address, significantly reduces entropy. An attacker can approximate the key generation time and brute-force the key…
When was CVE-2026-38447 disclosed?
CVE-2026-38447 was first published in the National Vulnerability Database on August 3, 2026, with the most recent update on August 31, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-38447 actively exploited?
CVE-2026-38447 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 61.2% of all scored CVEs.
What is the CVSS score of CVE-2026-38447?
CVE-2026-38447 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-38447?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-38447, 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.

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