CVE-2026-91966

MEDIUMPre-NVD 5.85.8—
EchelonGraph scoreHIGH confidence

Score 5.8 from GitHub Security Advisory published 2026-09-15. a secondary CVSS source baseline 5.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this weekElevated
5.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.8Exploit: Elevated riskExposed: 0

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

AVideo through 29.0 contains an unauthenticated server-side request forgery vulnerability in the check_site_availability function that accepts attacker-controlled HTTP Host headers. Attackers can send requests to submitIndex.php or ajax.php with arbitrary Host headers to probe internal network hosts and ports, following redirects without authentication.

CVSS v3
5.8
EG Score
5.8(high)
EG Risk
57(Attend)
EG Risk 57/100SSVC: 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
Severity58% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
32%
KEV
Not listed

Published

September 15, 2026

Last Modified

September 20, 2026

Advisory Details (2)

Auto-updated Sep 15, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

AVideo through 29.0 Unauthenticated SSRF via Host Header | Advisories | VulnCheck

https://www.vulncheck.com/advisories/avideo-through-29.0-unauthenticated-ssrf-via-host-header
github Patch Available🟡 PoC Available

Unauthenticated blind Host-header SSRF in WWBNIndex check_site_availability() · Advisory · WWBN/AVideo · GitHub

https://github.com/WWBN/AVideo/security/advisories/GHSA-rqg6-qcjv-55w5

Vendor Advisories for CVE-2026-91966(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 20× in last 7d / 20× 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. 2026-09-21 03:32 UTCEG score recompute
  2. 2026-09-21 03:32 UTCGHSA enrichment
  3. 2026-09-20 20:16 UTCEPSS rescore
  4. 2026-09-20 01:31 UTCEG score recompute
  5. 2026-09-20 01:31 UTCGHSA enrichment
  6. 2026-09-20 01:02 UTCEG score recompute
  7. 2026-09-20 01:02 UTCGHSA enrichment
  8. 2026-09-19 01:50 UTCEG score recompute
  9. 2026-09-19 01:50 UTCGHSA enrichment
  10. 2026-09-18 19:28 UTCEPSS rescore
  11. 2026-09-17 23:49 UTCEG score recompute
  12. 2026-09-17 23:49 UTCGHSA enrichment
  13. 2026-09-17 19:32 UTCEPSS rescore
  14. 2026-09-16 21:07 UTCGHSA enrichment
  15. 2026-09-16 18:35 UTCEG score recompute
  16. 2026-09-16 18:35 UTCGHSA enrichment
  17. 2026-09-16 14:09 UTCEPSS rescore
  18. 2026-09-15 16:32 UTCEG score recompute
  19. 2026-09-15 15:23 UTCEG score recompute
  20. 2026-09-15 15:22 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-91966?
CVE-2026-91966 is a medium vulnerability published on September 15, 2026. AVideo through 29.0 contains an unauthenticated server-side request forgery vulnerability in the checksiteavailability function that accepts attacker-controlled HTTP Host headers. Attackers can send requests to submitIndex.php or ajax.php with arbitrary Host headers to probe internal network hosts…
When was CVE-2026-91966 disclosed?
CVE-2026-91966 was first published in the National Vulnerability Database on September 15, 2026, with the most recent update on September 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-91966 actively exploited?
CVE-2026-91966 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 67.8% of all scored CVEs.
What is the CVSS score of CVE-2026-91966?
CVE-2026-91966 has a CVSS v3 base score of 5.8 (NVD).
How do I remediate CVE-2026-91966?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-91966, 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-2026-91966

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