CVE-2026-90538

MEDIUMPre-NVD 5.35.3
EchelonGraph scoreMEDIUM confidence

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

Score 5.3 from GitHub Security Advisory published 2026-09-12. A secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 3 sources updated this weekElevated
5.3EG
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: 0.4%CVSS: 5.3Exploit: 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.

WWBN AVideo through commit c3edcc274c389816d434acadac07ee78eaf330c1 contains a missing authorization vulnerability in playlistsFromUser.json.php that allows unauthenticated attackers to read private playlists by requesting another user's identifier. Attackers can retrieve Favorite and Watch Later playlists belonging to other users due to improper cache keying that conflates requests across different user contexts.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
55
EG Risk 55/100

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)
Severity53% × 45%
The EG Score, 5.3 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 or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.4%
EPSS %ILE
27th
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 or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the 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

September 12, 2026

Last Modified

September 14, 2026

Advisory Details (2)

Auto-updated Sep 12, 2026
No fix on record yet. Sources: github.
Web page

WWBN AVideo Missing Authorization via playlistsFromUser.json.php | Advisories | VulnCheck

https://www.vulncheck.com/advisories/wwbn-avideo-missing-authorization-via-playlistsfromuser-json-php
GitHub advisoryMentions a patch (unverified)

Missing authorization: `objects/playlistsFromUser.json.php` returns another user's private Favorite and Watch Later lists to guests · Advisory · WWBN/AVideo · GitHub

https://github.com/WWBN/AVideo/security/advisories/GHSA-6382-hm4f-hxqg

Vendor Advisories for CVE-2026-90538(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 22× in last 7d / 91× 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.

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. 1 repeat row among the latest 98 is merged into the row it repeats.

  1. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  2. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  3. 2026-10-12 16:16 UTCEG score recompute
  4. 2026-10-12 16:16 UTCGHSA enrichmentGHSA-xpgj-rxcp-fx4h · GitHub CVSS 5.3
  5. 2026-10-12 14:46 UTCEG score recompute
  6. 2026-10-11 22:10 UTCGHSA enrichmentGHSA-xpgj-rxcp-fx4h · GitHub CVSS 5.3
  7. 2026-10-11 19:14 UTCEG score recompute
  8. 2026-10-11 16:30 UTCEG score recompute
  9. 2026-10-11 13:50 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  10. 2026-10-11 13:45 UTCEG score recompute
  11. 2026-10-10 23:05 UTCEG score recompute
  12. 2026-10-10 23:05 UTCGHSA enrichmentGHSA-xpgj-rxcp-fx4h · GitHub CVSS 5.3
  13. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  14. 2026-10-09 22:32 UTCEG score recompute
  15. 2026-10-09 22:32 UTCGHSA enrichmentGHSA-xpgj-rxcp-fx4h · GitHub CVSS 5.3
  16. 2026-10-09 20:08 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  17. 2026-10-08 23:28 UTCEG score recompute
  18. 2026-10-08 23:28 UTCGHSA enrichmentGHSA-xpgj-rxcp-fx4h · GitHub CVSS 5.3
  19. 2026-10-08 17:14 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  20. 2026-10-08 00:25 UTCEG score recompute
  21. 2026-10-08 00:25 UTCGHSA enrichmentGHSA-xpgj-rxcp-fx4h · GitHub CVSS 5.3
  22. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  23. 2026-10-07 01:22 UTCEG score recompute
  24. 2026-10-07 01:22 UTCGHSA enrichmentGHSA-xpgj-rxcp-fx4h · GitHub CVSS 5.3
  25. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 27th percentile
Show 72 more
  1. 2026-10-06 02:19 UTCEG score recompute
  2. 2026-10-06 02:19 UTCGHSA enrichmentGHSA-xpgj-rxcp-fx4h · GitHub CVSS 5.3
  3. 2026-10-05 17:44 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  4. 2026-10-05 03:12 UTCEG score recompute
  5. 2026-10-05 03:12 UTCGHSA enrichmentGHSA-xpgj-rxcp-fx4h · GitHub CVSS 5.3
  6. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  7. 2026-10-04 04:07 UTCEG score recompute
  8. 2026-10-04 04:07 UTCGHSA enrichmentGHSA-xpgj-rxcp-fx4h · GitHub CVSS 5.3
  9. 2026-10-03 05:05 UTCEG score recompute
  10. 2026-10-03 05:05 UTCGHSA enrichmentGHSA-xpgj-rxcp-fx4h · GitHub CVSS 5.3
  11. 2026-10-02 06:02 UTCEG score recompute
  12. 2026-10-02 06:02 UTCGHSA enrichmentGHSA-xpgj-rxcp-fx4h · GitHub CVSS 5.3
  13. 2026-10-01 19:51 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  14. 2026-10-01 07:00 UTCEG score recompute
  15. 2026-10-01 07:00 UTCGHSA enrichmentGHSA-xpgj-rxcp-fx4h · GitHub CVSS 5.3
  16. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  17. 2026-09-30 07:57 UTCEG score recompute
  18. 2026-09-30 07:57 UTCGHSA enrichmentGHSA-xpgj-rxcp-fx4h · GitHub CVSS 5.3
  19. 2026-09-29 08:54 UTCEG score recompute
  20. 2026-09-29 08:54 UTCGHSA enrichmentGHSA-xpgj-rxcp-fx4h · GitHub CVSS 5.3
  21. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  22. 2026-09-28 09:52 UTCEG score recompute
  23. 2026-09-28 09:52 UTCGHSA enrichmentGHSA-xpgj-rxcp-fx4h · GitHub CVSS 5.3
  24. 2026-09-27 13:49 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  25. 2026-09-27 10:49 UTCEG score recompute
  26. 2026-09-27 10:49 UTCGHSA enrichmentGHSA-xpgj-rxcp-fx4h · GitHub CVSS 5.3
  27. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  28. 2026-09-26 11:36 UTCEG score recompute
  29. 2026-09-26 11:36 UTCGHSA enrichmentGHSA-xpgj-rxcp-fx4h · GitHub CVSS 5.3
  30. 2026-09-25 12:04 UTCEG score recompute
  31. 2026-09-25 12:04 UTCGHSA enrichmentGHSA-xpgj-rxcp-fx4h · GitHub CVSS 5.3
  32. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  33. 2026-09-24 13:00 UTCEG score recompute
  34. 2026-09-24 13:00 UTCGHSA enrichmentGHSA-xpgj-rxcp-fx4h · GitHub CVSS 5.3
  35. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  36. 2026-09-23 13:57 UTCEG score recompute
  37. 2026-09-23 13:57 UTCGHSA enrichmentGHSA-xpgj-rxcp-fx4h · GitHub CVSS 5.3
  38. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  39. 2026-09-22 14:54 UTCEG score recompute
  40. 2026-09-22 14:54 UTCGHSA enrichmentGHSA-xpgj-rxcp-fx4h · GitHub CVSS 5.3
  41. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  42. 2026-09-21 15:49 UTCEG score recompute
  43. 2026-09-21 15:49 UTCGHSA enrichmentGHSA-xpgj-rxcp-fx4h · GitHub CVSS 5.3
  44. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  45. 2026-09-20 16:46 UTCGHSA enrichmentGHSA-xpgj-rxcp-fx4h · GitHub CVSS 5.3
  46. 2026-09-19 17:42 UTCEG score recompute
  47. 2026-09-19 17:42 UTCGHSA enrichmentGHSA-xpgj-rxcp-fx4h · GitHub CVSS 5.3
  48. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  49. 2026-09-18 18:39 UTCGHSA enrichmentGHSA-xpgj-rxcp-fx4h · GitHub CVSS 5.3
  50. 2026-09-17 19:36 UTCEG score recompute
  51. 2026-09-17 19:36 UTCGHSA enrichmentGHSA-xpgj-rxcp-fx4h · GitHub CVSS 5.3
  52. 2026-09-17 19:32 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  53. 2026-09-16 19:59 UTCEG score recompute
  54. 2026-09-16 19:59 UTCGHSA enrichmentGHSA-xpgj-rxcp-fx4h · GitHub CVSS 5.3
  55. 2026-09-16 14:09 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  56. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  57. 2026-09-15 20:48 UTCEG score recompute
  58. 2026-09-15 20:48 UTCGHSA enrichmentGHSA-xpgj-rxcp-fx4h · GitHub CVSS 5.3
  59. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  60. 2026-09-14 21:18 UTCGHSA enrichmentGHSA-xpgj-rxcp-fx4h · GitHub CVSS 5.3
  61. 2026-09-14 19:21 UTCEG score recompute
  62. 2026-09-14 19:21 UTCGHSA enrichmentGHSA-xpgj-rxcp-fx4h · GitHub CVSS 5.3
  63. 2026-09-14 18:40 UTCEG score recompute
  64. 2026-09-14 18:40 UTCGHSA enrichmentGHSA-xpgj-rxcp-fx4h · GitHub CVSS 5.3
  65. 2026-09-14 11:30 UTCEG score recompute
  66. 2026-09-14 11:30 UTCGHSA enrichmentGHSA-xpgj-rxcp-fx4h · GitHub CVSS 5.3
  67. 2026-09-13 16:48 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  68. 2026-09-13 12:28 UTCEG score recompute
  69. 2026-09-13 12:28 UTCGHSA enrichmentGHSA-xpgj-rxcp-fx4h · GitHub CVSS 5.3
  70. 2026-09-12 13:25 UTCEG score recompute
  71. 2026-09-12 12:19 UTCEG score recomputeFirst assessed: 5.3 MEDIUM
  72. 2026-09-12 12:18 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-90538?
CVE-2026-90538 is a medium-severity vulnerability; its CVE record was published on September 12, 2026. WWBN AVideo through commit c3edcc274c389816d434acadac07ee78eaf330c1 contains a missing authorization vulnerability in playlistsFromUser.json.php that allows unauthenticated attackers to read private playlists by requesting another user's identifier. Attackers can retrieve Favorite and Watch Later…
When was CVE-2026-90538 made public?
CVE-2026-90538 was made public on August 28, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on September 12, 2026. EchelonGraph's copy of the record carries a last-modified date of September 14, 2026; the record at its source may have been updated since.
Is CVE-2026-90538 actively exploited?
CVE-2026-90538 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (27th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-90538?
CVE-2026-90538 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-90538?
No fix for CVE-2026-90538 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-90538 are linked in the Vendor Advisories panel on this page.

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