CVE-2026-73090

CRITICALPre-NVD 9.39.3
EchelonGraph scoreMEDIUM confidence

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

This critical-severity CVE scores 9.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (31st percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
9.3EG
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).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 9.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

PeerTube is an ActivityPub-federated video streaming platform. Prior to 8.2.2, processUpdateActivity and processUpdateVideo accept an ActivityPub Update containing a Video object without verifying that byActor.url is authorized for the host in videoObject.id, allowing a malicious federated server to rewrite another server's video metadata, visibility, media file, and HLS URLs. This issue is fixed in version 8.2.2.

CVSS v3
9.3
EG Score
9.3CRITICALmedium confidence
EG Risk
57
EG Risk 57/100

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)
Severity93% × 45%
The EG Score, 9.3 of 10.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
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 none (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: 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
31st
KEV
Not listed

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

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

Exploitation none (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

August 11, 2026

Last Modified

September 9, 2026

Advisory Details (3)

Auto-updated Oct 3, 2026
Patch available. Sources: github_commit, github_release, github.
GitHub advisoryMentions a patch (unverified)

Cross-origin remote video takeover via Update activity · Advisory · Chocobozzz/PeerTube · GitHub

Affected: 8.2.2

https://github.com/Chocobozzz/PeerTube/security/advisories/GHSA-g9p4-f7h8-hc86
GitHub release Patch Available

v8.2.2

Patch available: Chocobozzz/PeerTube v8.2.2

https://github.com/Chocobozzz/PeerTube/releases/tag/v8.2.2
GitHub commit

commit 63d487d2a4a2 (Chocobozzz/PeerTube)

Fix landed in Chocobozzz/PeerTube commit 63d487d2a4a2 — awaiting tagged release

https://github.com/Chocobozzz/PeerTube/commit/63d487d2a4a2a0e36af8c0ccb888cd23725bf7f2

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 48× 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 97 of 113 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. 3 repeat rows among the latest 100 are merged into the row they repeat. The 16 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

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

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Frequently asked(5)

What is CVE-2026-73090?
CVE-2026-73090 is a critical-severity vulnerability; its CVE record was published on August 11, 2026. PeerTube is an ActivityPub-federated video streaming platform. Prior to 8.2.2, processUpdateActivity and processUpdateVideo accept an ActivityPub Update containing a Video object without verifying that byActor.url is authorized for the host in videoObject.id, allowing a malicious federated server…
When was the CVE record for CVE-2026-73090 published?
The CVE record for CVE-2026-73090 was published on August 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 September 9, 2026; the record at its source may have been updated since.
Is CVE-2026-73090 actively exploited?
CVE-2026-73090 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (31st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-73090?
CVE-2026-73090 has a CVSS base score of 9.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-73090?
A fix for CVE-2026-73090 is available: update to the fixed version the vendor names in its advisory.

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