CVE-2026-52873

MEDIUMPre-NVD 6.96.9—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.9 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 72% 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
Elevated
6.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.9Exploit: Elevated riskExposed: 0

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

Streambert is a cross-platform Electron Desktop App to stream and download video content. From version 2.5.0 until version 2.6.0, the wyzie-open-redeem IPC handler in index.js creates the partition:wyzie-redeem Electron session and registers an onHeadersReceived hook that removes the Content-Security-Policy header from every response in that session. The redeem window also lacks a setWindowOpenHandler restriction, so script injection in sub.wyzie.io, a loaded third-party resource, or a site reached through navigation executes without CSP constraints and can affect additional windows and persistent session storage. A user must open the Wyzie API key redemption window, and exploitation requires attacker-controlled script content in a loaded page. The resulting renderer script can invoke renderer-exposed application functionality and can be chained with other vulnerabilities to access internal services or sensitive data. This issue is fixed in version 2.6.0.

CVSS v3
6.9
EG Score
6.9(medium)
EG Risk
47(Track)
EG Risk 47/100SSVC: 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
Severity69% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
28%
KEV
Not listed

Published

August 18, 2026

Last Modified

September 9, 2026

Advisory Details (4)

Auto-updated Aug 18, 2026
🔬 Proof of concept available. Patch available. Sources: github_pr, github_release, github, github_commit.
github Patch Available🟡 PoC Available

Global CSP Removal in Wyzie Redeem Window Enables Unconstrained XSS in Electron Renderer · Advisory · truelockmc/streambert · GitHub

https://github.com/truelockmc/streambert/security/advisories/GHSA-2j2q-qvpf-wh43
github_release Patch Available

v.2.6.0

Patch available: truelockmc/streambert 2.6.0

https://github.com/truelockmc/streambert/releases/tag/2.6.0
github_pr Patch Available

Updated wyzie-subs handling & created a guide (similar to the tmdb-tutorial)

Patch available: truelockmc/streambert 2.6.0 (PR #126 merged 2026-06-02)

https://github.com/truelockmc/streambert/pull/126
github_commit Patch Available

commit 0bd6b6ca8c83 (truelockmc/streambert)

Patch available: truelockmc/streambert 2.6.0 (contains commit 0bd6b6ca8c83)

https://github.com/truelockmc/streambert/commit/0bd6b6ca8c830f22f75de1aa2e0d8b9bdf6d34c7

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 49× 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. 2026-09-19 02:51 UTCEG score recompute
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-18 02:23 UTCEG score recompute
  4. 2026-09-17 01:55 UTCEG score recompute
  5. 2026-09-16 14:08 UTCEPSS rescore
  6. 2026-09-16 05:15 UTCEPSS rescore
  7. 2026-09-16 01:27 UTCEG score recompute
  8. 2026-09-14 00:32 UTCEG score recompute
  9. 2026-09-13 16:47 UTCEPSS rescore
  10. 2026-09-13 00:04 UTCEG score recompute
  11. 2026-09-11 23:37 UTCEG score recompute
  12. 2026-09-11 14:53 UTCEPSS rescore
  13. 2026-09-10 23:07 UTCEG score recompute
  14. 2026-09-10 09:35 UTCEPSS rescore
  15. 2026-09-09 02:46 UTCEG score recompute
  16. 2026-09-08 22:01 UTCEPSS rescore
  17. 2026-09-07 16:01 UTCEPSS rescore
  18. 2026-09-07 08:16 UTCEG score recompute
  19. 2026-09-06 13:47 UTCEPSS rescore
  20. 2026-09-06 07:13 UTCEG score recompute
  21. 2026-09-05 06:45 UTCEG score recompute
  22. 2026-09-04 06:12 UTCEG score recompute
  23. 2026-09-04 05:06 UTCEPSS rescore
  24. 2026-09-03 05:45 UTCEG score recompute
  25. 2026-09-02 14:12 UTCEPSS rescore
Show 29 more
  1. 2026-09-02 04:42 UTCEG score recompute
  2. 2026-09-01 13:54 UTCEPSS rescore
  3. 2026-09-01 04:40 UTCEPSS rescore
  4. 2026-08-31 03:39 UTCEG score recompute
  5. 2026-08-30 19:17 UTCEPSS rescore
  6. 2026-08-30 03:11 UTCEG score recompute
  7. 2026-08-30 01:22 UTCEPSS rescore
  8. 2026-08-29 02:43 UTCEG score recompute
  9. 2026-08-28 21:41 UTCEPSS rescore
  10. 2026-08-27 23:10 UTCEG score recompute
  11. 2026-08-27 14:25 UTCEPSS rescore
  12. 2026-08-26 22:42 UTCEG score recompute
  13. 2026-08-26 14:46 UTCEPSS rescore
  14. 2026-08-25 22:14 UTCEG score recompute
  15. 2026-08-25 13:49 UTCEPSS rescore
  16. 2026-08-24 21:45 UTCEG score recompute
  17. 2026-08-23 21:18 UTCEG score recompute
  18. 2026-08-23 00:19 UTCEPSS rescore
  19. 2026-08-22 20:51 UTCEG score recompute
  20. 2026-08-21 23:49 UTCEPSS rescore
  21. 2026-08-21 20:23 UTCEG score recompute
  22. 2026-08-21 19:34 UTCEG score recompute
  23. 2026-08-20 23:18 UTCEG score recompute
  24. 2026-08-20 22:55 UTCEPSS rescore
  25. 2026-08-19 22:51 UTCEG score recompute
  26. 2026-08-19 17:04 UTCEPSS rescore
  27. 2026-08-18 22:23 UTCEG score recompute
  28. 2026-08-18 21:38 UTCEG score recompute
  29. 2026-08-18 21:38 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-52873?
CVE-2026-52873 is a medium vulnerability published on August 18, 2026. Streambert is a cross-platform Electron Desktop App to stream and download video content. From version 2.5.0 until version 2.6.0, the wyzie-open-redeem IPC handler in index.js creates the partition:wyzie-redeem Electron session and registers an onHeadersReceived hook that removes the…
When was CVE-2026-52873 disclosed?
CVE-2026-52873 was first published in the National Vulnerability Database on August 18, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-52873 actively exploited?
CVE-2026-52873 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 71.8% of all scored CVEs.
What is the CVSS score of CVE-2026-52873?
CVE-2026-52873 has a CVSS v3 base score of 6.9 (NVD).
How do I remediate CVE-2026-52873?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-52873, 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.

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