CVE-2026-18363

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 78% 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: epss, secondary
Trending — 3 sources updated this week
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.1Exploit: None knownExposed: 0

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

A logic vulnerability in the password reset token validation routine implemented by osTicket in versions prior to v1.17.8 and v1.18.4. During the password reset process, the application retrieves the timestamp associated with the provided token and checks whether the configured validity period has expired. Consequently, the expiry check is only performed if the timestamp lookup fails, allowing tokens with an existing timestamp to bypass the intended expiry validation. Therefore, an attacker able to obtain a valid password reset token could reuse it to perform an unauthorised password reset and compromise the affected account.

CVSS v3
9.1
EG Score
9.1(medium)
EG Risk
41(Track)
EG Risk 41/100SSVC: 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
Severity91% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
22%
KEV
Not listed

Published

July 30, 2026

Last Modified

July 30, 2026

Advisory Details (1)

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

Weak password recovery mechanism in osTicket by Enhancesoft LLC | INCIBE-CERT | INCIBE

https://www.incibe.es/en/incibe-cert/notices/aviso/weak-password-recovery-mechanism-osticket-enhancesoft-llc

Vendor Advisories for CVE-2026-18363(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 55× in last 7d / 223× 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 223 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-18363?
CVE-2026-18363 is a critical vulnerability published on July 30, 2026. A logic vulnerability in the password reset token validation routine implemented by osTicket in versions prior to v1.17.8 and v1.18.4. During the password reset process, the application retrieves the timestamp associated with the provided token and checks whether the configured validity period has…
When was CVE-2026-18363 disclosed?
CVE-2026-18363 was first published in the National Vulnerability Database 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-2026-18363 actively exploited?
CVE-2026-18363 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 78.1% of all scored CVEs.
What is the CVSS score of CVE-2026-18363?
CVE-2026-18363 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-18363?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-18363, 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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