CVE-2026-8451

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-06-30. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 16%CVSS: 7.5Exploit: Elevated riskExposed: 0

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

Insufficient input validation in NetScaler ADC and NetScaler Gateway leading to memory overread if NetScaler ADC or NetScaler Gateway is configured as a SAML IDP

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
54(Track)
EG Risk 54/100SSVC: 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
Severity75% × 45%
Exploitation40% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
16%
EPSS %ILE
97%
KEV
Not listed

Published

June 30, 2026

Last Modified

July 1, 2026

Advisory Details (1)

Auto-updated Jun 30, 2026
No patch confirmed yet.
generic

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https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696604

Vendor Advisories for CVE-2026-8451(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 6× in last 7d / 67× 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 194 total refreshes for this CVE.

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

Publicly available exploits

(4 references)

Working exploit code is in the public domain (4 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCamnsecurity/CVE-2026-8451-CitrixBleed
    First seen Jul 7, 2026

    CVE-2026-8451 - Citrix NetScaler SAML Memory Overread (CitrixBleed) - PoC & Analysis | CVSS 8.8 | AMN SECURITY

    Open source ↗
  • GitHub PoC0xBlackash/CVE-2026-8451
    First seen Jul 3, 2026

    CVE-2026-8451

    Open source ↗
  • GitHub PoCwatchtowrlabs/watchTowr-vs-Netscaler-CVE-2026-8451
    First seen Jun 30, 2026
    Open source ↗
  • GitHub PoCderekpreston81/CVE_ADC_IOC_2026
    First seen Jun 30, 2026

    Citrix NetScaler CVE Preconditions Checker as per CTX696604 | Supported CVE : CVE-2026-8451, CVE-2026-8452, CVE-2026-8655, CVE-2026-10816, CVE-2026-10817, and CVE-2026-13474

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-8451?
CVE-2026-8451 is a high vulnerability published on June 30, 2026. Insufficient input validation in NetScaler ADC and NetScaler Gateway leading to memory overread if NetScaler ADC or NetScaler Gateway is configured as a SAML IDP
When was CVE-2026-8451 disclosed?
CVE-2026-8451 was first published in the National Vulnerability Database on June 30, 2026, with the most recent update on July 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8451 actively exploited?
CVE-2026-8451 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 16% probability of exploitation in the next 30 days, which ranks it in the top 3.4% of all scored CVEs.
What is the CVSS score of CVE-2026-8451?
CVE-2026-8451 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-8451?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8451, 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.

Dependency Blast Radius

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