CVE-2026-54458

CRITICALPre-NVD 9.69.6
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 9.6 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-04. A secondary CVSS source baseline 9.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Elevated

Also known asEUVD-2026-44824 (ENISA EUVD) · GHSA-8whc-2wmv-ww35 (GitHub Security Advisories)Source: ENISA EUVD

9.6EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 9.6Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

WWBN AVideo is an open source video platform. Versions prior to 29.0 contain a stored DOM Cross-Site Scripting vulnerability in the YPTSocket plugin. Any unauthenticated remote attacker can execute arbitrary JavaScript in the authenticated origin of every administrator currently viewing a page that renders the YPTSocket online-users debug panel. plugin/YPTSocket/getWebSocket.json.php issues a signed WebSocket token to any anonymous caller, and MessageSQLiteV2::onOpen at plugin/YPTSocket/MessageSQLiteV2.php lines 91 and 110 reads the attacker-controlled webSocketSelfURI and page_title query parameters from the WebSocket connection URL with no validation. Both values persist into the in-memory SQLite connections table and broadcast inside the users_id_online array sent to every connected client; on the client, plugin/YPTSocket/script.js::updateSocketUserCard interpolates the broadcast page_title into an HTML template literal that is passed to jQuery $.append(html), which parses attacker bytes into live DOM nodes including with inline event handlers. Successful attackers can can read non-HttpOnly cookies and the CSRF token rendered into the admin dashboard, issue authenticated requests to any admin-only endpoint, exfiltrate the admin dashboard DOM, and chain into any admin-context mutation. When the victim is an AVideo administrator, the attacker turns a single anonymous WebSocket connection into full administrative takeover via the admin's own session. This issue has been patched by https://github.com/WWBN/AVideo/commit/8be71e53ccbe9b84b30870db386fb4d2b11e1c16.

CVSS v3
9.6
EG Score
9.6CRITICALmedium confidence
EG Risk
59
EG Risk 59/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity96% × 45%
Impact severity (EG Severity): CVSS 9.6 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.4%
EPSS %ILE
32nd
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.6): severity, escalated by confirmed exploitation. This CVE's 9.6 is its impact severity (EG Severity), not escalated.

EG Severity
9.6 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-12). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track* at medium mission impactTrack at low, Track* at medium and Attend at high mission impact.CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Track* at medium and Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

June 4, 2026

Last Modified

October 24, 2026

Advisory Details (2)

Auto-updated Oct 7, 2026
Patch available. Sources: github_commit, github.
GitHub advisoryMentions a patch (unverified)

Unauthenticated Stored DOM Cross-Site Scripting via Per-Client Metadata Broadcast in YPTSocket Plugin · Advisory · WWBN/AVideo · GitHub

https://github.com/WWBN/AVideo/security/advisories/GHSA-8whc-2wmv-ww35
GitHub commit Patch Available

commit 8be71e53ccbe (WWBN/AVideo)

Patch available: WWBN/AVideo v29.1.0 (contains commit 8be71e53ccbe)

https://github.com/WWBN/AVideo/commit/8be71e53ccbe9b84b30870db386fb4d2b11e1c16

Vendor Advisories for CVE-2026-54458(1)

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

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
composerWWBN/AVideo @ 29.1.0 (fixes < 29.1.0)—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFix by version rangeDependents
WWBN/AVideo—
  • every version up to 29.1.0: fixed in 29.1.0
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 15× in last 7d / 59× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 369 rows on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 269 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 15:48 UTCEchelonGraph re-scored
  2. 2026-11-13 15:48 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  3. 2026-11-12 16:34 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  4. 2026-11-12 16:15 UTCEchelonGraph re-scored
  5. 2026-11-12 16:15 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  6. 2026-11-11 16:40 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  7. 2026-11-11 16:36 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  8. 2026-11-10 17:04 UTCEchelonGraph re-scored
  9. 2026-11-10 17:04 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  10. 2026-11-10 16:44 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  11. 2026-11-09 17:32 UTCEchelonGraph re-scored
  12. 2026-11-09 17:32 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  13. 2026-11-09 16:35 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  14. 2026-11-08 18:01 UTCEchelonGraph re-scored
  15. 2026-11-08 18:01 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  16. 2026-11-08 16:40 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  17. 2026-11-07 18:29 UTCEchelonGraph re-scored
  18. 2026-11-07 18:29 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  19. 2026-11-07 16:39 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  20. 2026-11-06 18:56 UTCEchelonGraph re-scored
  21. 2026-11-06 18:56 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  22. 2026-11-06 16:38 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  23. 2026-11-06 11:55 UTCOSV refresh
  24. 2026-11-05 19:25 UTCEchelonGraph re-scored
  25. 2026-11-05 19:25 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
Show 75 more
  1. 2026-11-05 16:38 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  2. 2026-11-04 19:54 UTCEchelonGraph re-scored
  3. 2026-11-04 19:54 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  4. 2026-11-04 16:35 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  5. 2026-11-03 20:22 UTCEchelonGraph re-scored
  6. 2026-11-03 20:22 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  7. 2026-11-03 16:48 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  8. 2026-11-02 20:51 UTCEchelonGraph re-scored
  9. 2026-11-02 20:51 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  10. 2026-11-02 16:45 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  11. 2026-11-01 21:19 UTCEchelonGraph re-scored
  12. 2026-11-01 21:19 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  13. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  14. 2026-10-31 21:49 UTCEchelonGraph re-scored
  15. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  16. 2026-10-30 22:18 UTCEchelonGraph re-scored
  17. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  18. 2026-10-29 22:42 UTCEchelonGraph re-scored
  19. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  20. 2026-10-28 23:11 UTCEchelonGraph re-scored
  21. 2026-10-28 23:10 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  22. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  23. 2026-10-27 23:38 UTCEchelonGraph re-scored
  24. 2026-10-27 23:38 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  25. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  26. 2026-10-27 00:04 UTCEchelonGraph re-scored
  27. 2026-10-27 00:03 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  28. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  29. 2026-10-25 20:57 UTCEchelonGraph re-scored
  30. 2026-10-25 20:57 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  31. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  32. 2026-10-25 14:19 UTCEchelonGraph re-scored
  33. 2026-10-24 21:26 UTCEchelonGraph re-scored
  34. 2026-10-24 21:26 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  35. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  36. 2026-10-24 13:06 UTCEchelonGraph re-scored
  37. 2026-10-24 13:06 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  38. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  39. 2026-10-23 13:32 UTCEchelonGraph re-scored
  40. 2026-10-23 13:32 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  41. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  42. 2026-10-22 13:59 UTCEchelonGraph re-scored
  43. 2026-10-22 13:59 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  44. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  45. 2026-10-21 14:26 UTCEchelonGraph re-scored
  46. 2026-10-21 14:26 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  47. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  48. 2026-10-20 14:34 UTCEchelonGraph re-scored
  49. 2026-10-20 14:33 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  50. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  51. 2026-10-19 13:39 UTCEchelonGraph re-scored
  52. 2026-10-19 13:39 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  53. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  54. 2026-10-18 13:32 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  55. 2026-10-18 03:31 UTCEchelonGraph re-scored
  56. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  57. 2026-10-17 14:00 UTCEchelonGraph re-scored
  58. 2026-10-17 14:00 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  59. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  60. 2026-10-16 14:26 UTCEchelonGraph re-scored
  61. 2026-10-16 14:26 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  62. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  63. 2026-10-15 14:42 UTCEchelonGraph re-scored
  64. 2026-10-15 14:41 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  65. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  66. 2026-10-14 09:16 UTCEchelonGraph re-scored
  67. 2026-10-14 09:15 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  68. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  69. 2026-10-13 06:28 UTCEchelonGraph re-scored
  70. 2026-10-13 06:28 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  71. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  72. 2026-10-12 15:56 UTCEchelonGraph re-scored
  73. 2026-10-12 06:56 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  74. 2026-10-11 19:39 UTCEchelonGraph re-scored
  75. 2026-10-11 16:54 UTCEchelonGraph re-scored

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-54458?
CVE-2026-54458 is a critical-severity vulnerability; its CVE record was published on June 4, 2026. WWBN AVideo is an open source video platform. Versions prior to 29.0 contain a stored DOM Cross-Site Scripting vulnerability in the YPTSocket plugin. Any unauthenticated remote attacker can execute arbitrary JavaScript in the authenticated origin of every administrator currently viewing a page that…
When was the CVE record for CVE-2026-54458 published?
The CVE record for CVE-2026-54458 was published on June 4, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 24, 2026; the record at its source may have been updated since.
Is CVE-2026-54458 actively exploited?
CVE-2026-54458 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (32nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-54458?
CVE-2026-54458 has a CVSS base score of 9.6 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-54458?
A fix for CVE-2026-54458 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-54458 are linked in the Vendor Advisories panel on this page.

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