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CVE-2026-89321

🗓️ 14 Sep 2026 08:13:03Reported by eclipseType 
cve
 cve
🔗 web.nvd.nist.gov👁 11 Views🌐 WEB

Unbounded decompression in OpenVSX VSIX serving allows a small VSIX to exhaust server temp disk.

Related
Detection
Affected
Refs
Paths
ReporterTitlePublishedViews
Family
cvelist
Cvelist
CVE-2026-89321
14 Sep 202608:13
–cvelist
euvd
EUVD
EUVD-2026-77328
14 Sep 202608:13
–euvd
nvd
NVD
CVE-2026-89321
14 Sep 202609:17
–nvd
ptsecurity
Positive Technologies
PT-2026-91116
14 Sep 202600:00
–ptsecurity
rapid7
Rapid7 Vulnerability Database (full)
CVE-2026-89321: Improper Handling of Highly Compressed Data (Data Amplification)
14 Sep 202600:00
–rapid7
vulnrichment
Vulnrichment
CVE-2026-89321
14 Sep 202608:13
–vulnrichment
Vulners
Node
eclipseopen_vsxRange0.20.0–1.2.0
[
  {
    "vendor": "Eclipse Foundation",
    "product": "Eclipse OpenVSX",
    "versions": [
      {
        "status": "affected",
        "version": "0.20.0",
        "lessThan": "1.2.0",
        "versionType": "semver"
      }
    ],
    "defaultStatus": "unaffected"
  }
]
ParameterPositionPathDescriptionCWE
pathpath/vscode/unpkg/{namespace}/{extension}/{version}/{path}Unbounded decompressed data from a ZIP entry of a VSIX is written to temp storage, enabling disk exhaustion via cache when a small, highly compressible extension is uploaded and requests a large decompressed entry.CWE-409

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16 Sep 2026 20:38Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.14.3
EPSS0.0044
SSVC
11