CVE-2026-43874

HIGHNVD 7.27.2
EchelonGraph scoreMEDIUM confidence

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

Score 7.2 from GitHub Security Advisory (severity: HIGH) published 2026-05-05. NVD baseline CVSS 7.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Elevated
7.2EG
EchelonGraph verdictPlan mitigationRemediate 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: 0.3%CVSS: 7.2Exploit: No code on recordExposed services: Not assessed

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

The CVE record's description, written by its CNA (GitHub, Inc.), states the affected versions: "In versions up to and including 29.0, the server-side mitigation for the YPTSocket autoEvalCodeOnHTML eval sink (from CVE-2026-40911) only strips the payload when it sits under $json['msg'], but the relay function msgTo…" No release containing a fix is confirmed on record.

WWBN AVideo is an open source video platform. In versions up to and including 29.0, the server-side mitigation for the YPTSocket autoEvalCodeOnHTML eval sink (from CVE-2026-40911) only strips the payload when it sits under $json['msg'], but the relay function msgToResourceId() selects the outbound message from $msg['json'] before $msg['msg']. An unauthenticated attacker can obtain a WebSocket token from plugin/YPTSocket/getWebSocket.json.php, connect to the WebSocket server, and send a message with autoEvalCodeOnHTML nested under a top-level json field — the strip branch is skipped, the relay delivers the payload verbatim to any logged-in user identified by to_users_id, and the client script runs it through eval(). Commit 9f3006f9a89a34daa67a83c6ad35f450cb91fcce contains an updated fix.

CVSS v3
7.2
EG Score
7.2HIGHmedium confidence
EG Risk
63
EG Risk 63/100

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 (value × EchelonGraph’s weight)
Severity72% × 45%
The EG Score, 7.2 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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: No fix is confirmed yet. Restrict network exposure of the affected system within your standard update timelines at low or medium mission impact and sooner than that at high, and watch for a fix.
EPSS PROB
0.3%
EPSS %ILE
23rd
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system within your standard update timelines at low or medium mission impact and sooner than that at high, and watch for a fix.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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

May 11, 2026

Last Modified

May 12, 2026

Advisory Details (2)

Auto-updated May 11, 2026
No fix on record yet. Sources: github.
GitHub advisoryMentions a patch (unverified)

Incomplete Fix for YPTSocket autoEvalCodeOnHTML Strip: Unauthenticated Cross-User JavaScript Execution via `$msg['json']` Relay Bypass · Advisory · WWBN/AVideo · GitHub

https://github.com/WWBN/AVideo/security/advisories/GHSA-ghcv-22jf-vfxm
Web page

feat: Implement recursive removal of autoEvalCodeOnHTML from message … · WWBN/AVideo@9f3006f · GitHub

https://github.com/WWBN/AVideo/commit/9f3006f9a89a34daa67a83c6ad35f450cb91fcce

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
composerwwbn/avideo—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/avideo10.4 ... 29.0 (18 versions)
  • every version through 29.0: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 27× 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 it from the CNA feed. 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). Most recent first.

Showing the most recent 100 of 227 refreshes 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 127 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  2. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  3. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  4. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  5. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  6. 2026-10-12 16:05 UTCEG score recompute
  7. 2026-10-11 19:47 UTCEG score recompute
  8. 2026-10-11 17:02 UTCEG score recompute
  9. 2026-10-11 14:28 UTCEG score recompute
  10. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  11. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  12. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  13. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  14. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  15. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  16. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  17. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  18. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  19. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  20. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  21. 2026-09-30 06:58 UTCOSV refresh
  22. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  23. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  24. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  25. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.3% · 16th percentile
Show 75 more
  1. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  2. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  3. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  4. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  5. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  6. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  7. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  8. 2026-09-11 11:53 UTCOSV refresh
  9. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  10. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  11. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  12. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  13. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  14. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  15. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  16. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  17. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  18. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  19. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  20. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  21. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  22. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  23. 2026-08-23 18:34 UTCEG score recompute
  24. 2026-08-23 18:34 UTCGHSA enrichmentGHSA-ghcv-22jf-vfxm · GitHub severity HIGH · GitHub CVSS 7.2
  25. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  26. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  27. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  28. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  29. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  30. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  31. 2026-08-17 11:00 UTCEG score recompute
  32. 2026-08-17 11:00 UTCGHSA enrichmentGHSA-ghcv-22jf-vfxm · GitHub severity HIGH · GitHub CVSS 7.2
  33. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  34. 2026-08-16 04:21 UTCEG score recompute
  35. 2026-08-16 04:21 UTCGHSA enrichmentGHSA-ghcv-22jf-vfxm · GitHub severity HIGH · GitHub CVSS 7.2
  36. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  37. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  38. 2026-08-14 16:03 UTCGHSA enrichmentGHSA-ghcv-22jf-vfxm · GitHub severity HIGH · GitHub CVSS 7.2
  39. 2026-08-14 02:53 UTCEG score recompute
  40. 2026-08-14 02:53 UTCGHSA enrichmentGHSA-ghcv-22jf-vfxm · GitHub severity HIGH · GitHub CVSS 7.2
  41. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  42. 2026-08-13 05:56 UTCGHSA enrichmentGHSA-ghcv-22jf-vfxm · GitHub severity HIGH · GitHub CVSS 7.2
  43. 2026-08-12 16:27 UTCEG score recompute
  44. 2026-08-12 16:27 UTCGHSA enrichmentGHSA-ghcv-22jf-vfxm · GitHub severity HIGH · GitHub CVSS 7.2
  45. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  46. 2026-08-11 15:45 UTCEG score recompute
  47. 2026-08-11 15:45 UTCGHSA enrichmentGHSA-ghcv-22jf-vfxm · GitHub severity HIGH · GitHub CVSS 7.2
  48. 2026-08-11 13:43 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  49. 2026-08-11 01:08 UTCEG score recompute
  50. 2026-08-11 01:08 UTCGHSA enrichmentGHSA-ghcv-22jf-vfxm · GitHub severity HIGH · GitHub CVSS 7.2
  51. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  52. 2026-08-10 04:30 UTCGHSA enrichmentGHSA-ghcv-22jf-vfxm · GitHub severity HIGH · GitHub CVSS 7.2
  53. 2026-08-09 15:20 UTCEG score recompute
  54. 2026-08-09 15:20 UTCGHSA enrichmentGHSA-ghcv-22jf-vfxm · GitHub severity HIGH · GitHub CVSS 7.2
  55. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  56. 2026-08-09 02:11 UTCEG score recompute
  57. 2026-08-09 02:11 UTCGHSA enrichmentGHSA-ghcv-22jf-vfxm · GitHub severity HIGH · GitHub CVSS 7.2
  58. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  59. 2026-08-08 03:53 UTCEG score recompute
  60. 2026-08-08 03:53 UTCGHSA enrichmentGHSA-ghcv-22jf-vfxm · GitHub severity HIGH · GitHub CVSS 7.2
  61. 2026-08-07 14:44 UTCGHSA enrichmentGHSA-ghcv-22jf-vfxm · GitHub severity HIGH · GitHub CVSS 7.2
  62. 2026-08-07 01:35 UTCEG score recompute
  63. 2026-08-07 01:35 UTCGHSA enrichmentGHSA-ghcv-22jf-vfxm · GitHub severity HIGH · GitHub CVSS 7.2
  64. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  65. 2026-08-06 11:04 UTCGHSA enrichmentGHSA-ghcv-22jf-vfxm · GitHub severity HIGH · GitHub CVSS 7.2
  66. 2026-08-05 21:54 UTCEG score recompute
  67. 2026-08-05 21:54 UTCGHSA enrichmentGHSA-ghcv-22jf-vfxm · GitHub severity HIGH · GitHub CVSS 7.2
  68. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  69. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  70. 2026-08-04 10:38 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  71. 2026-08-03 19:22 UTCEG score recompute
  72. 2026-08-03 19:22 UTCGHSA enrichmentGHSA-ghcv-22jf-vfxm · GitHub severity HIGH · GitHub CVSS 7.2
  73. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  74. 2026-08-03 02:33 UTCGHSA enrichmentGHSA-ghcv-22jf-vfxm · GitHub severity HIGH · GitHub CVSS 7.2
  75. 2026-08-02 13:24 UTCEG score recompute

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-43874?
CVE-2026-43874 is a high-severity vulnerability; its CVE record was published on May 11, 2026. WWBN AVideo is an open source video platform. In versions up to and including 29.0, the server-side mitigation for the YPTSocket autoEvalCodeOnHTML eval sink (from CVE-2026-40911) only strips the payload when it sits under $json['msg'], but the relay function msgToResourceId() selects the outbound…
When was the CVE record for CVE-2026-43874 published?
The CVE record for CVE-2026-43874 was published on May 11, 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 May 12, 2026; the record at its source may have been updated since.
Is CVE-2026-43874 actively exploited?
CVE-2026-43874 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (23rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-43874?
CVE-2026-43874 has a CVSS v3 base score of 7.2 (NVD).
How do I remediate CVE-2026-43874?
No fix for CVE-2026-43874 is confirmed yet. Until one is published, restrict network exposure of the affected system — for example, keep it off the internet or limit it to trusted networks — and watch for a fix. The CVE record's description, written by its CNA (GitHub, Inc.), states the affected versions: "In versions up to and including 29.0, the server-side mitigation for the YPTSocket autoEvalCodeOnHTML eval sink (from CVE-2026-40911) only strips the payload when it sits under $json['msg'], but the relay function msgTo…" No release containing a fix is confirmed on record.

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