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: 0.7%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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
9.8CRITICALmedium confidence
EG Risk
59
EG Risk 59/100CISA SSVC

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%
Exploitation1% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.7%
EPSS %ILE
50th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 3, 2026

Last Modified

August 31, 2026

Advisory Details (4)

Auto-updated Sep 28, 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 22× in last 7d / 135× 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 359 total refreshes for this CVE.

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

Related CVEs(same CWE)

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 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 0.7% probability of exploitation in the next 30 days (50th percentile of EPSS-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?
A fix for CVE-2026-38447 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-38447 are linked in the Vendor Advisories panel on this page.

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