CVE-2026-8451

HIGHNVD 7.57.5—
EchelonGraph scoreHIGH 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 — 4 sources updated this weekElevated
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 7.5Exploit: NoneExposed: 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(high)
EPSS
39.3%
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 36× in last 7d / 36× 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.

  1. 2026-07-07 03:11 UTCEG score recompute
  2. 2026-07-07 03:11 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 14:08 UTCEG score recompute
  6. 2026-07-06 14:08 UTCGHSA enrichment
  7. 2026-07-06 02:23 UTCEPSS rescore
  8. 2026-07-06 02:23 UTCEPSS rescore
  9. 2026-07-06 01:06 UTCEG score recompute
  10. 2026-07-06 01:05 UTCGHSA enrichment
  11. 2026-07-05 11:59 UTCEG score recompute
  12. 2026-07-05 11:59 UTCGHSA enrichment
  13. 2026-07-05 02:31 UTCEPSS rescore
  14. 2026-07-05 02:30 UTCEPSS rescore
  15. 2026-07-04 22:56 UTCEG score recompute
  16. 2026-07-04 22:56 UTCGHSA enrichment
  17. 2026-07-04 09:52 UTCEG score recompute
  18. 2026-07-04 09:52 UTCGHSA enrichment
  19. 2026-07-04 06:31 UTCEPSS rescore
  20. 2026-07-04 06:31 UTCEPSS rescore
  21. 2026-07-03 20:50 UTCEG score recompute
  22. 2026-07-03 20:50 UTCGHSA enrichment
  23. 2026-07-03 07:48 UTCEG score recompute
  24. 2026-07-03 07:48 UTCGHSA enrichment
  25. 2026-07-02 18:43 UTCEG score recompute
Show 11 more
  1. 2026-07-02 18:43 UTCGHSA enrichment
  2. 2026-07-02 05:41 UTCEG score recompute▼ 1.30
  3. 2026-07-02 05:41 UTCGHSA enrichment
  4. 2026-07-01 17:06 UTCNVD updateCVSS v3 → 7.5
  5. 2026-07-01 16:37 UTCEG score recompute
  6. 2026-07-01 16:37 UTCGHSA enrichment
  7. 2026-07-01 15:07 UTCEPSS rescore
  8. 2026-07-01 03:35 UTCEG score recompute
  9. 2026-07-01 03:35 UTCGHSA enrichment
  10. 2026-06-30 14:33 UTCEG score recompute
  11. 2026-06-30 14:32 UTCNVD updatefirst tracked

Publicly available exploits

(2 references)

Working exploit code is in the public domain (2 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • 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 ↗

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 39.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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

Explore the affected products and dependency analysis for CVE-2026-8451

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