CVE-2026-86188

HIGHPre-NVD 7.27.2—
EchelonGraph scoreHIGH confidence

Score 7.2 from GitHub Security Advisory published 2026-09-05. a secondary CVSS source baseline 7.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
7.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.2Exploit: Elevated riskExposed: 0

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

AVideo with YPTSocket plugin enabled contains a cross-site scripting vulnerability allowing unauthenticated attackers to execute arbitrary JavaScript in other users' browsers via the websocket callback mechanism. Attackers can send crafted socket messages with callback names resolving to global functions like avideoConfirmHTML that accept untrusted data and assign it to innerHTML, achieving script execution in the victim's origin without authentication or user interaction.

CVSS v3
7.2
EG Score
7.2(high)
EG Risk
63(Attend)
EG Risk 63/100SSVC: 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
Severity72% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
34%
KEV
Not listed

Published

September 5, 2026

Last Modified

September 8, 2026

Advisory Details (2)

Auto-updated Sep 5, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

AVideo YPTSocket Plugin Unauthenticated Cross-Site Scripting | Advisories | VulnCheck

https://www.vulncheck.com/advisories/avideo-yptsocket-plugin-unauthenticated-cross-site-scripting
github Patch Available🟡 PoC Available

Cross-Site Scripting: the websocket layer lets an unauthenticated peer choose which global JavaScript function runs in another user's browser, and AVideo ships one that assigns its argument to innerHTML · Advisory · WWBN/AVideo · GitHub

https://github.com/WWBN/AVideo/security/advisories/GHSA-xpx7-h2x7-59qq

Vendor Advisories for CVE-2026-86188(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 26× in last 7d / 79× 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. 2026-09-25 03:50 UTCGHSA enrichment
  2. 2026-09-24 15:19 UTCEG score recompute
  3. 2026-09-24 15:19 UTCGHSA enrichment
  4. 2026-09-24 14:04 UTCEPSS rescore
  5. 2026-09-24 02:32 UTCEG score recompute
  6. 2026-09-24 02:32 UTCGHSA enrichment
  7. 2026-09-23 17:54 UTCEPSS rescore
  8. 2026-09-23 14:01 UTCGHSA enrichment
  9. 2026-09-23 01:30 UTCEG score recompute
  10. 2026-09-23 01:30 UTCGHSA enrichment
  11. 2026-09-22 16:01 UTCEPSS rescore
  12. 2026-09-22 12:59 UTCGHSA enrichment
  13. 2026-09-22 00:29 UTCEG score recompute
  14. 2026-09-22 00:29 UTCGHSA enrichment
  15. 2026-09-21 21:09 UTCEPSS rescore
  16. 2026-09-21 11:57 UTCGHSA enrichment
  17. 2026-09-20 23:27 UTCEG score recompute
  18. 2026-09-20 23:27 UTCGHSA enrichment
  19. 2026-09-20 20:16 UTCEPSS rescore
  20. 2026-09-20 10:56 UTCGHSA enrichment
  21. 2026-09-19 22:26 UTCEG score recompute
  22. 2026-09-19 22:26 UTCGHSA enrichment
  23. 2026-09-19 09:55 UTCGHSA enrichment
  24. 2026-09-18 21:23 UTCEG score recompute
  25. 2026-09-18 21:23 UTCGHSA enrichment
Show 54 more
  1. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 08:53 UTCGHSA enrichment
  3. 2026-09-17 20:22 UTCEG score recompute
  4. 2026-09-17 20:22 UTCGHSA enrichment
  5. 2026-09-17 19:32 UTCEPSS rescore
  6. 2026-09-17 06:51 UTCGHSA enrichment
  7. 2026-09-16 18:20 UTCEG score recompute
  8. 2026-09-16 18:20 UTCGHSA enrichment
  9. 2026-09-16 14:09 UTCEPSS rescore
  10. 2026-09-16 05:32 UTCEG score recompute
  11. 2026-09-16 05:32 UTCGHSA enrichment
  12. 2026-09-16 05:15 UTCEPSS rescore
  13. 2026-09-15 17:01 UTCGHSA enrichment
  14. 2026-09-15 04:29 UTCEG score recompute
  15. 2026-09-15 04:29 UTCGHSA enrichment
  16. 2026-09-15 03:12 UTCEPSS rescore
  17. 2026-09-15 03:12 UTCEPSS rescore
  18. 2026-09-14 15:58 UTCGHSA enrichment
  19. 2026-09-14 03:27 UTCEG score recompute
  20. 2026-09-14 03:27 UTCGHSA enrichment
  21. 2026-09-13 14:56 UTCGHSA enrichment
  22. 2026-09-13 02:25 UTCEG score recompute
  23. 2026-09-13 02:25 UTCGHSA enrichment
  24. 2026-09-12 13:55 UTCGHSA enrichment
  25. 2026-09-12 01:24 UTCEG score recompute
  26. 2026-09-12 01:24 UTCGHSA enrichment
  27. 2026-09-11 14:53 UTCEPSS rescore
  28. 2026-09-11 14:53 UTCEPSS rescore
  29. 2026-09-11 12:53 UTCEG score recompute
  30. 2026-09-11 12:53 UTCGHSA enrichment
  31. 2026-09-11 00:22 UTCGHSA enrichment
  32. 2026-09-10 11:51 UTCEG score recompute
  33. 2026-09-10 11:51 UTCGHSA enrichment
  34. 2026-09-09 23:20 UTCGHSA enrichment
  35. 2026-09-09 08:45 UTCEG score recompute
  36. 2026-09-09 08:45 UTCGHSA enrichment
  37. 2026-09-08 22:01 UTCEPSS rescore
  38. 2026-09-08 20:14 UTCGHSA enrichment
  39. 2026-09-08 15:13 UTCEG score recompute
  40. 2026-09-08 15:12 UTCGHSA enrichment
  41. 2026-09-08 14:15 UTCEG score recompute
  42. 2026-09-08 14:14 UTCGHSA enrichment
  43. 2026-09-08 04:01 UTCEG score recompute
  44. 2026-09-08 04:01 UTCGHSA enrichment
  45. 2026-09-07 15:29 UTCGHSA enrichment
  46. 2026-09-07 02:58 UTCGHSA enrichment
  47. 2026-09-06 14:28 UTCEG score recompute
  48. 2026-09-06 14:28 UTCGHSA enrichment
  49. 2026-09-06 13:48 UTCEPSS rescore
  50. 2026-09-06 01:57 UTCEG score recompute
  51. 2026-09-06 01:56 UTCGHSA enrichment
  52. 2026-09-05 13:23 UTCEG score recompute
  53. 2026-09-05 12:34 UTCEG score recompute
  54. 2026-09-05 12:32 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-86188?
CVE-2026-86188 is a high vulnerability published on September 5, 2026. AVideo with YPTSocket plugin enabled contains a cross-site scripting vulnerability allowing unauthenticated attackers to execute arbitrary JavaScript in other users' browsers via the websocket callback mechanism. Attackers can send crafted socket messages with callback names resolving to global…
When was CVE-2026-86188 disclosed?
CVE-2026-86188 was first published in the National Vulnerability Database on September 5, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-86188 actively exploited?
CVE-2026-86188 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 65.6% of all scored CVEs.
What is the CVSS score of CVE-2026-86188?
CVE-2026-86188 has a CVSS v3 base score of 7.2 (NVD).
How do I remediate CVE-2026-86188?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-86188, 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-2026-86188

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