CVE-2026-23933

HIGHPre-NVD 7.77.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 90% 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
7.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.7Exploit: None knownExposed: 0

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

In Zabbix 7.4 the cryptographic key used for signing Frontend sessions has been erroneously written to the database seed. Currently the only known exploitation scenario is for deployments that utilize both - SAML authentication and guest users. In such cases the key can be used to forge valid session cookies, potentially leading to unauthorized access. For other Zabbix deployments this does not have a known impact.

CVSS v3
7.7
EG Score
7.7(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: 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
Severity77% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
10%
KEV
Not listed

Published

August 18, 2026

Last Modified

September 1, 2026

Advisory Details (1)

Auto-updated Aug 18, 2026
No patch confirmed yet.
generic

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https://support.zabbix.com/browse/ZBX-28071

Vendor Advisories for CVE-2026-23933(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 25× in last 7d / 108× 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 122 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-23933?
CVE-2026-23933 is a high vulnerability published on August 18, 2026. In Zabbix 7.4 the cryptographic key used for signing Frontend sessions has been erroneously written to the database seed. Currently the only known exploitation scenario is for deployments that utilize both - SAML authentication and guest users. In such cases the key can be used to forge valid…
When was CVE-2026-23933 disclosed?
CVE-2026-23933 was first published in the National Vulnerability Database on August 18, 2026, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-23933 actively exploited?
CVE-2026-23933 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 90.0% of all scored CVEs.
What is the CVSS score of CVE-2026-23933?
CVE-2026-23933 has a CVSS v3 base score of 7.7 (NVD).
How do I remediate CVE-2026-23933?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-23933, 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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