CVE-2026-82809

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreHIGH confidence

Score 4.3 from GitHub Security Advisory (severity: LOW) published 2026-08-31. a secondary CVSS source baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: Elevated riskExposed: 0

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

A security flaw has been discovered in vidIQ Vision for YouTube Extension 3.199.0 on Chrome. The affected element is the function window.addEventListener of the component postMessage Handler. Performing a manipulation of the argument vidiqEvent results in information disclosure. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks. The vendor explains: "At this time, vidIQ does not accept security vulnerability submissions, and we do not have a bug bounty program in place."

CVSS v3
4.3
EG Score
4.3(high)
EG Risk
35(Track)
EG Risk 35/100SSVC: 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
Severity43% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
36%
KEV
Not listed

Published

August 31, 2026

Last Modified

September 1, 2026

Advisory Details (1)

Auto-updated Aug 31, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

chrome_extensions/vidIQ Inc. vidIQ Vision for YouTube 3.199.0 exposes YouTube video frame captures through an unauthenticated postMessage handler at main · xryj920/chrome_extensions · GitHub

https://github.com/xryj920/chrome_extensions/blob/main/vidIQ%20Inc.%20vidIQ%20Vision%20for%20YouTube%203.199.0%20exposes%20YouTube%20video%20frame%20captures%20through%20an%20unauthenticated%20postMessage%20handler

Vendor Advisories for CVE-2026-82809(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 19× in last 7d / 69× 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 01:05 UTCEG score recompute
  2. 2026-09-25 01:05 UTCGHSA enrichment
  3. 2026-09-24 14:04 UTCEPSS rescore
  4. 2026-09-23 23:49 UTCEG score recompute
  5. 2026-09-23 23:49 UTCGHSA enrichment
  6. 2026-09-23 17:54 UTCEPSS rescore
  7. 2026-09-22 22:32 UTCEG score recompute
  8. 2026-09-22 22:32 UTCGHSA enrichment
  9. 2026-09-22 16:01 UTCEPSS rescore
  10. 2026-09-21 21:16 UTCEG score recompute
  11. 2026-09-21 21:16 UTCGHSA enrichment
  12. 2026-09-21 21:09 UTCEPSS rescore
  13. 2026-09-20 20:16 UTCEPSS rescore
  14. 2026-09-20 20:00 UTCGHSA enrichment
  15. 2026-09-19 18:44 UTCEG score recompute
  16. 2026-09-19 18:44 UTCGHSA enrichment
  17. 2026-09-18 19:28 UTCEPSS rescore
  18. 2026-09-18 17:28 UTCEG score recompute
  19. 2026-09-18 17:28 UTCGHSA enrichment
  20. 2026-09-17 16:11 UTCGHSA enrichment
  21. 2026-09-16 14:55 UTCEG score recompute
  22. 2026-09-16 14:55 UTCGHSA enrichment
  23. 2026-09-16 14:08 UTCEPSS rescore
  24. 2026-09-16 05:15 UTCEPSS rescore
  25. 2026-09-15 13:39 UTCEG score recompute
Show 44 more
  1. 2026-09-15 13:39 UTCGHSA enrichment
  2. 2026-09-15 03:12 UTCEPSS rescore
  3. 2026-09-15 03:12 UTCEPSS rescore
  4. 2026-09-14 12:23 UTCEG score recompute
  5. 2026-09-14 12:23 UTCGHSA enrichment
  6. 2026-09-13 11:07 UTCEG score recompute
  7. 2026-09-13 11:07 UTCGHSA enrichment
  8. 2026-09-12 09:51 UTCEG score recompute
  9. 2026-09-12 09:51 UTCGHSA enrichment
  10. 2026-09-11 14:53 UTCEPSS rescore
  11. 2026-09-11 14:53 UTCEPSS rescore
  12. 2026-09-11 08:35 UTCEG score recompute
  13. 2026-09-11 08:35 UTCGHSA enrichment
  14. 2026-09-10 07:19 UTCGHSA enrichment
  15. 2026-09-09 06:03 UTCEG score recompute
  16. 2026-09-09 06:03 UTCGHSA enrichment
  17. 2026-09-08 22:01 UTCEPSS rescore
  18. 2026-09-08 04:48 UTCEG score recompute
  19. 2026-09-08 04:48 UTCGHSA enrichment
  20. 2026-09-07 03:32 UTCEG score recompute
  21. 2026-09-07 03:32 UTCGHSA enrichment
  22. 2026-09-06 13:48 UTCEPSS rescore
  23. 2026-09-06 02:12 UTCEG score recompute
  24. 2026-09-06 02:12 UTCGHSA enrichment
  25. 2026-09-05 15:31 UTCEPSS rescore
  26. 2026-09-05 00:56 UTCEG score recompute
  27. 2026-09-05 00:55 UTCGHSA enrichment
  28. 2026-09-04 05:07 UTCEPSS rescore
  29. 2026-09-03 23:38 UTCGHSA enrichment
  30. 2026-09-02 22:18 UTCEG score recompute
  31. 2026-09-02 22:18 UTCGHSA enrichment
  32. 2026-09-02 14:12 UTCEPSS rescore
  33. 2026-09-01 21:02 UTCGHSA enrichment
  34. 2026-09-01 19:46 UTCEG score recompute
  35. 2026-09-01 19:46 UTCGHSA enrichment
  36. 2026-09-01 13:54 UTCEPSS rescore
  37. 2026-08-31 18:26 UTCEG score recompute
  38. 2026-08-31 18:20 UTCNVD updateCVSS v4 → 2.1
  39. 2026-08-31 18:02 UTCEG score recompute
  40. 2026-08-31 17:59 UTCMITRE cvelistV5CVSS v4 → 5.3
  41. 2026-08-31 17:24 UTCEG score recompute
  42. 2026-08-31 17:20 UTCNVD updateCVSS v4 → 2.1
  43. 2026-08-31 16:37 UTCEG score recompute
  44. 2026-08-31 16:34 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-82809?
CVE-2026-82809 is a medium vulnerability published on August 31, 2026. A security flaw has been discovered in vidIQ Vision for YouTube Extension 3.199.0 on Chrome. The affected element is the function window.addEventListener of the component postMessage Handler. Performing a manipulation of the argument vidiqEvent results in information disclosure. The attack is…
When was CVE-2026-82809 disclosed?
CVE-2026-82809 was first published in the National Vulnerability Database on August 31, 2026, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-82809 actively exploited?
CVE-2026-82809 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 64.0% of all scored CVEs.
What is the CVSS score of CVE-2026-82809?
CVE-2026-82809 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-82809?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-82809, 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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