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: 0.5% (39th percentile of EPSS-scored CVEs). 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 mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 9.1Exploit: None knownExposed services: Not assessed

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

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
9.1CRITICALmedium confidence
EG Risk
41
EG Risk 41/100CISA 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
Severity91% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.5%
EPSS %ILE
39th
KEV
Not listed

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

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (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

July 30, 2026

Last Modified

July 30, 2026

Advisory Details (1)

Auto-updated Sep 16, 2026
No fix on record 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 17× in last 7d / 110× 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 402 total refreshes for this CVE.

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

Related CVEs(same CWE)

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 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 0.5% probability of exploitation in the next 30 days (39th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-18363?
CVE-2026-18363 has a CVSS base score of 9.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-18363?
No fix for CVE-2026-18363 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-18363 are linked in the Vendor Advisories panel on this page.

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