When parsing a Range header containing a large number of small ranges, FileServer(FS), ServeContent, and ServeFile(FS) can consume an excessive… (CVE-2026-78667)
Description
CVE-2026-78667 is a vulnerability in FileServer(FS), ServeContent, and ServeFile(FS) where parsing a Range header with many small ranges causes excessive CPU consumption. This can lead to a denial of service condition by exhausting server resources. The vulnerability does not impact confidentiality or integrity but affects availability.
CVSS v3.1
Score 7.5high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability occurs when the affected components parse an HTTP Range header containing a large number of small ranges. The processing leads to excessive CPU usage, potentially degrading service performance or causing denial of service. The affected components are FileServer(FS), ServeContent, and ServeFile(FS). No further technical details or exploit code are provided.
Potential Impact
The vulnerability impacts availability by causing excessive CPU consumption during processing of crafted Range headers. There is no impact on confidentiality or integrity. Exploitation could result in denial of service conditions on affected servers.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch information is provided at this time.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-f4xw-m386-m277
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-78667"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ac96e592cdf04f65689a802
Added to database: 10/09/2026, 22:44:41 UTC
Last enriched: 10/09/2026, 22:51:59 UTC
Last updated: 10/10/2026, 04:48:07 UTC
Views: 6
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