CVE-2026-73090

CRITICALPre-NVD 9.39.3—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 87% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
9.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.3Exploit: None knownExposed: 0

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

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
9.3(medium)
EG Risk
57(Track)
EG Risk 57/100SSVC: 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
Severity93% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
13%
KEV
Not listed

Published

August 11, 2026

Last Modified

August 13, 2026

Advisory Details (3)

Auto-updated Aug 23, 2026
Patch available. Sources: github_release, github, github_commit.
github Patch Available

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 / 41× 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. 2026-08-30 05:08 UTCEG score recompute
  2. 2026-08-30 01:22 UTCEPSS rescore
  3. 2026-08-29 09:08 UTCEG score recompute
  4. 2026-08-28 21:42 UTCEPSS rescore
  5. 2026-08-27 16:37 UTCEG score recompute
  6. 2026-08-27 14:25 UTCEPSS rescore
  7. 2026-08-26 18:51 UTCEG score recompute
  8. 2026-08-26 14:47 UTCEPSS rescore
  9. 2026-08-25 15:41 UTCEG score recompute
  10. 2026-08-25 13:49 UTCEPSS rescore
  11. 2026-08-24 14:49 UTCEG score recompute
  12. 2026-08-24 10:40 UTCEG score recompute
  13. 2026-08-23 01:28 UTCEG score recompute
  14. 2026-08-23 00:19 UTCEPSS rescore
  15. 2026-08-22 00:36 UTCEG score recompute
  16. 2026-08-21 23:49 UTCEPSS rescore
  17. 2026-08-20 23:43 UTCEG score recompute
  18. 2026-08-20 22:56 UTCEPSS rescore
  19. 2026-08-19 18:40 UTCEG score recompute
  20. 2026-08-19 17:04 UTCEPSS rescore
  21. 2026-08-18 17:22 UTCEG score recompute
  22. 2026-08-18 13:49 UTCEPSS rescore
  23. 2026-08-18 13:49 UTCEPSS rescore
  24. 2026-08-17 14:50 UTCEG score recompute
  25. 2026-08-17 13:47 UTCEPSS rescore
Show 16 more
  1. 2026-08-16 18:01 UTCEG score recompute
  2. 2026-08-16 14:56 UTCEPSS rescore
  3. 2026-08-16 14:56 UTCEPSS rescore
  4. 2026-08-16 05:35 UTCEG score recompute
  5. 2026-08-16 02:15 UTCEPSS rescore
  6. 2026-08-15 04:46 UTCEG score recompute
  7. 2026-08-15 01:31 UTCEPSS rescore
  8. 2026-08-13 23:47 UTCEG score recompute
  9. 2026-08-13 22:00 UTCEPSS rescore
  10. 2026-08-13 15:28 UTCEG score recompute
  11. 2026-08-13 14:25 UTCEG score recompute
  12. 2026-08-12 15:24 UTCEG score recompute
  13. 2026-08-12 13:51 UTCEPSS rescore
  14. 2026-08-11 18:37 UTCEG score recompute
  15. 2026-08-11 17:36 UTCEG score recompute
  16. 2026-08-11 17:35 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-73090?
CVE-2026-73090 is a critical vulnerability 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 CVE-2026-73090 disclosed?
CVE-2026-73090 was first published in the National Vulnerability Database on August 11, 2026, with the most recent update on August 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-73090 actively exploited?
CVE-2026-73090 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 87.1% of all scored CVEs.
What is the CVSS score of CVE-2026-73090?
CVE-2026-73090 has a CVSS v3 base score of 9.3 (NVD).
How do I remediate CVE-2026-73090?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-73090, 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

Explore the affected products and dependency analysis for CVE-2026-73090

Explore →

Is Your Infrastructure Affected by CVE-2026-73090?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs