CVE-2026-52872

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2% (7th percentile of EPSS-scored CVEs). 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
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 8.8Exploit: Elevated riskExposed services: Not assessed

The CVE record names the fixed release — apply it.

Streambert is a cross-platform Electron Desktop App to stream and download video content. Prior to 2.5.0, the downloadSubtitleFile utility in src/ipc/downloads.js, reached through the run-download IPC channel, accepts a renderer-supplied subtitle url using the file: URI scheme and passes its decoded pathname to fs.copyFileSync. The renderer also controls downloadPath, which determines the destination path. A compromised renderer can therefore copy any file readable by the StreamBERT process into an attacker-chosen writable location, exposing sensitive local data, and can overwrite existing writable files. This vulnerability is fixed in 2.5.0.

CVSS v3
8.8
EG Score
8.8HIGHmedium confidence
EG Risk
56
EG Risk 56/100CISA SSVC

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
Severity88% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low, Track* at medium and Attend at high mission impact.
Action: The CVE record names the fixed release. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.2%
EPSS %ILE
7th
KEV
Not listed

CISA SSVCTrack at low, Track* at medium and Attend at high mission impact.

The CVE record names the fixed release. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 18, 2026

Last Modified

September 9, 2026

Advisory Details (1)

Auto-updated Aug 18, 2026
🔬 Proof of concept available. Fix named in the CVE record. Sources: github.
githubMentions a patch (unverified)🟡 PoC Available

Local File Exfiltration and Overwrite via Subtitle file: Protocol · Advisory · truelockmc/streambert · GitHub

https://github.com/truelockmc/streambert/security/advisories/GHSA-v74h-2468-rxhh

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 47× 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. 2026-10-09 20:07 UTCEPSS rescore
  2. 2026-10-08 17:12 UTCEPSS rescore
  3. 2026-10-08 09:00 UTCEG score recompute
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  21. 2026-09-27 19:08 UTCEG score recompute
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  1. 2026-09-25 00:58 UTCEG score recompute
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  3. 2026-09-23 17:53 UTCEPSS rescore
  4. 2026-09-22 21:16 UTCEG score recompute
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  7. 2026-09-20 20:16 UTCEPSS rescore
  8. 2026-09-19 22:09 UTCEG score recompute
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  10. 2026-09-18 19:28 UTCEPSS rescore
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  15. 2026-09-16 05:15 UTCEPSS rescore
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  18. 2026-09-13 16:47 UTCEPSS rescore
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  20. 2026-09-11 22:05 UTCEG score recompute
  21. 2026-09-11 14:53 UTCEPSS rescore
  22. 2026-09-11 10:12 UTCEG score recompute
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  24. 2026-09-10 09:35 UTCEPSS rescore
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  26. 2026-09-08 22:01 UTCEPSS rescore
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  28. 2026-09-07 16:01 UTCEPSS rescore
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  30. 2026-09-06 13:47 UTCEPSS rescore
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  34. 2026-09-04 05:06 UTCEPSS rescore
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  38. 2026-09-01 13:54 UTCEPSS rescore
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  40. 2026-08-31 02:18 UTCEG score recompute
  41. 2026-08-30 19:17 UTCEPSS rescore
  42. 2026-08-30 02:37 UTCEG score recompute
  43. 2026-08-30 01:22 UTCEPSS rescore
  44. 2026-08-29 02:56 UTCEG score recompute
  45. 2026-08-28 21:41 UTCEPSS rescore
  46. 2026-08-27 14:58 UTCEG score recompute
  47. 2026-08-27 14:25 UTCEPSS rescore
  48. 2026-08-26 15:14 UTCEG score recompute
  49. 2026-08-26 14:46 UTCEPSS rescore
  50. 2026-08-25 15:33 UTCEG score recompute
  51. 2026-08-25 13:49 UTCEPSS rescore
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  53. 2026-08-23 04:20 UTCEG score recompute
  54. 2026-08-23 00:19 UTCEPSS rescore
  55. 2026-08-22 04:35 UTCEG score recompute
  56. 2026-08-21 23:49 UTCEPSS rescore
  57. 2026-08-21 04:55 UTCEG score recompute
  58. 2026-08-20 22:55 UTCEPSS rescore
  59. 2026-08-19 17:24 UTCEG score recompute
  60. 2026-08-19 17:04 UTCEPSS rescore
  61. 2026-08-19 16:52 UTCEG score recompute
  62. 2026-08-18 22:23 UTCEG score recompute
  63. 2026-08-18 21:38 UTCEG score recompute
  64. 2026-08-18 21:38 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-52872?
CVE-2026-52872 is a high vulnerability published on August 18, 2026. Streambert is a cross-platform Electron Desktop App to stream and download video content. Prior to 2.5.0, the downloadSubtitleFile utility in src/ipc/downloads.js, reached through the run-download IPC channel, accepts a renderer-supplied subtitle url using the file: URI scheme and passes its…
When was CVE-2026-52872 disclosed?
CVE-2026-52872 was first published 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-2026-52872 actively exploited?
CVE-2026-52872 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (7th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-52872?
CVE-2026-52872 has a CVSS base score of 8.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-52872?
The CVE record for CVE-2026-52872 names the fix: "This vulnerability is fixed in 2.5.0."

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