CVE-2026-89255

HIGHPre-NVD 8.78.7—
EchelonGraph scoreHIGH confidence

Score 8.7 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-11. a secondary CVSS source baseline 8.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
8.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.7Exploit: Elevated riskExposed: 0

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

AVideo through commit c3edcc274c389816d434acadac07ee78eaf330c1 contains a stored cross-site scripting vulnerability in the LoginControl plugin that fails to HTML-encode PGP public keys echoed into a textarea element. An authenticated attacker can inject malicious JavaScript by submitting a crafted public key, which executes in an administrator's session when viewing the user's profile tab.

CVSS v3
8.7
EG Score
8.7(high)
EG Risk
55(Track*)
EG Risk 55/100SSVC: 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
Severity87% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
28%
KEV
Not listed

Published

September 11, 2026

Last Modified

September 11, 2026

Advisory Details (2)

Auto-updated Sep 11, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

AVideo LoginControl Stored XSS via PGP Public Key | Advisories | VulnCheck

https://www.vulncheck.com/advisories/avideo-logincontrol-stored-xss-via-pgp-public-key
github Patch Available🟡 PoC Available

Stored XSS: LoginControl echoes a stored PGP public key inside a `<textarea>` on the admin user profile tab · Advisory · WWBN/AVideo · GitHub

https://github.com/WWBN/AVideo/security/advisories/GHSA-gq4h-vw2w-9rx3

Vendor Advisories for CVE-2026-89255(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 27× in last 7d / 58× 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 09:52 UTCGHSA enrichment
  2. 2026-09-24 21:45 UTCEG score recompute
  3. 2026-09-24 21:45 UTCGHSA enrichment
  4. 2026-09-24 14:04 UTCEPSS rescore
  5. 2026-09-24 09:38 UTCGHSA enrichment
  6. 2026-09-23 21:31 UTCEG score recompute
  7. 2026-09-23 21:31 UTCGHSA enrichment
  8. 2026-09-23 17:54 UTCEPSS rescore
  9. 2026-09-23 09:24 UTCGHSA enrichment
  10. 2026-09-22 21:17 UTCEG score recompute
  11. 2026-09-22 21:17 UTCGHSA enrichment
  12. 2026-09-22 16:01 UTCEPSS rescore
  13. 2026-09-22 09:10 UTCEG score recompute
  14. 2026-09-22 09:10 UTCGHSA enrichment
  15. 2026-09-21 21:09 UTCEPSS rescore
  16. 2026-09-21 20:49 UTCGHSA enrichment
  17. 2026-09-21 08:41 UTCGHSA enrichment
  18. 2026-09-20 20:26 UTCEG score recompute
  19. 2026-09-20 20:26 UTCGHSA enrichment
  20. 2026-09-20 20:16 UTCEPSS rescore
  21. 2026-09-20 08:19 UTCGHSA enrichment
  22. 2026-09-19 20:12 UTCEG score recompute
  23. 2026-09-19 20:12 UTCGHSA enrichment
  24. 2026-09-19 08:04 UTCGHSA enrichment
  25. 2026-09-18 19:57 UTCEG score recompute
Show 33 more
  1. 2026-09-18 19:57 UTCGHSA enrichment
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-18 07:50 UTCGHSA enrichment
  4. 2026-09-17 19:43 UTCEG score recompute
  5. 2026-09-17 19:43 UTCGHSA enrichment
  6. 2026-09-17 19:32 UTCEPSS rescore
  7. 2026-09-17 06:19 UTCGHSA enrichment
  8. 2026-09-16 18:07 UTCEG score recompute
  9. 2026-09-16 18:07 UTCGHSA enrichment
  10. 2026-09-16 14:09 UTCEPSS rescore
  11. 2026-09-16 05:15 UTCEPSS rescore
  12. 2026-09-16 04:31 UTCGHSA enrichment
  13. 2026-09-15 16:24 UTCGHSA enrichment
  14. 2026-09-15 04:17 UTCEG score recompute
  15. 2026-09-15 04:17 UTCGHSA enrichment
  16. 2026-09-15 03:12 UTCEPSS rescore
  17. 2026-09-14 16:10 UTCGHSA enrichment
  18. 2026-09-14 04:03 UTCEG score recompute
  19. 2026-09-14 04:03 UTCGHSA enrichment
  20. 2026-09-13 16:48 UTCEPSS rescore
  21. 2026-09-13 15:56 UTCGHSA enrichment
  22. 2026-09-13 03:49 UTCGHSA enrichment
  23. 2026-09-12 15:42 UTCEG score recompute
  24. 2026-09-12 15:42 UTCGHSA enrichment
  25. 2026-09-12 15:02 UTCEPSS rescore
  26. 2026-09-12 03:35 UTCGHSA enrichment
  27. 2026-09-11 15:28 UTCEG score recompute
  28. 2026-09-11 15:28 UTCGHSA enrichment
  29. 2026-09-11 14:20 UTCEG score recompute
  30. 2026-09-11 14:20 UTCGHSA enrichment
  31. 2026-09-11 12:22 UTCEG score recompute
  32. 2026-09-11 11:27 UTCEG score recompute
  33. 2026-09-11 11:24 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-89255?
CVE-2026-89255 is a high vulnerability published on September 11, 2026. AVideo through commit c3edcc274c389816d434acadac07ee78eaf330c1 contains a stored cross-site scripting vulnerability in the LoginControl plugin that fails to HTML-encode PGP public keys echoed into a textarea element. An authenticated attacker can inject malicious JavaScript by submitting a crafted…
When was CVE-2026-89255 disclosed?
CVE-2026-89255 was first published in the National Vulnerability Database on September 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-89255 actively exploited?
CVE-2026-89255 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 72.3% of all scored CVEs.
What is the CVSS score of CVE-2026-89255?
CVE-2026-89255 has a CVSS v3 base score of 8.7 (NVD).
How do I remediate CVE-2026-89255?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-89255, 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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