CVE-2026-88592

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreHIGH confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-16. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 5 sources updated this weekElevated
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: Elevated riskExposed: 0

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

kkFileView >= 4.2.0 is vulnerable to Server-Side Request Forgery (SSRF). The cross-origin file proxy endpoint /getCorsFile is protected by TrustHostFilter against the trust.host whitelist. However, the URL parameter validated by the filter is not the same parameter the controller actually fetches: the filter validates the first non-empty parameter in a fixed priority order, while the controller only reads and fetches urlPath. By supplying both urlPath= and url= in the same request, the decoy passes validation while the unvalidated real target is fetched server-side — and the response body is echoed back to the attacker.

CVSS v3
9.1
EG Score
9.1(high)
EG Risk
72(Attend)
EG Risk 72/100SSVC: Attend

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%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
8%
KEV
Not listed

Published

September 16, 2026

Last Modified

September 17, 2026

Advisory Details (1)

Auto-updated Sep 17, 2026
No patch confirmed yet.
generic

SSRF in kkFileView /getCorsFile via TrustHostFilter Parameter-Confusion Bypass (Response Echo) · Issue #2 · sg-summer/cve · GitHub

https://github.com/sg-summer/cve/issues/2

Vendor Advisories for CVE-2026-88592(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 / 25× 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. 2026-09-19 21:00 UTCGHSA enrichment
  2. 2026-09-19 16:58 UTCEG score recompute
  3. 2026-09-19 16:58 UTCGHSA enrichment
  4. 2026-09-19 12:55 UTCGHSA enrichment
  5. 2026-09-19 08:53 UTCGHSA enrichment
  6. 2026-09-19 04:50 UTCGHSA enrichment
  7. 2026-09-19 00:46 UTCGHSA enrichment
  8. 2026-09-18 20:44 UTCEG score recompute
  9. 2026-09-18 20:44 UTCGHSA enrichment
  10. 2026-09-18 19:28 UTCEPSS rescore
  11. 2026-09-18 16:40 UTCGHSA enrichment
  12. 2026-09-18 12:37 UTCGHSA enrichment
  13. 2026-09-18 08:35 UTCGHSA enrichment
  14. 2026-09-18 04:33 UTCGHSA enrichment
  15. 2026-09-18 00:31 UTCEG score recompute
  16. 2026-09-18 00:31 UTCGHSA enrichment
  17. 2026-09-17 20:29 UTCEG score recompute
  18. 2026-09-17 20:29 UTCGHSA enrichment
  19. 2026-09-17 19:44 UTCEG score recompute▲ 9.10
  20. 2026-09-17 19:44 UTCGHSA enrichment
  21. 2026-09-17 19:44 UTCMITRE cvelistV5CVSS v3 → 9.1 · severity → CRITICAL
  22. 2026-09-17 19:32 UTCEPSS rescore
  23. 2026-09-16 20:25 UTCNVD update
  24. 2026-09-16 19:49 UTCEG score recompute
  25. 2026-09-16 19:49 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-88592?
CVE-2026-88592 is a critical vulnerability published on September 16, 2026. kkFileView >= 4.2.0 is vulnerable to Server-Side Request Forgery (SSRF). The cross-origin file proxy endpoint /getCorsFile is protected by TrustHostFilter against the trust.host whitelist. However, the URL parameter validated by the filter is not the same parameter the controller actually fetches:…
When was CVE-2026-88592 disclosed?
CVE-2026-88592 was first published in the National Vulnerability Database on September 16, 2026, with the most recent update on September 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-88592 actively exploited?
CVE-2026-88592 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 92.3% of all scored CVEs.
What is the CVSS score of CVE-2026-88592?
CVE-2026-88592 has a CVSS v3.1 base score of 9.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-88592?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-88592, 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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