Answer in brief
CVE-2026-78667 records a Unknown severity vulnerability in Lack of limit on size of parsed Range headers in net/http. The current sources do not mark it as known exploited. The current feed maps Go standard library/net/http (generic), stdlib (go). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Go standard library/net/http (generic), stdlib (go). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Go standard library/net/httpgeneric | >=0 <1.26.9 || >=1.27.0-0 <1.27.2 | 1.26.9, 1.27.2 |
| stdlibgo | >=0 <1.26.9 >=1.27.0-0 <1.27.2 | 1.26.9, 1.27.2 |
Published upstream
Oct 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 8, 2026
When parsing a Range header containing a large number of small ranges, FileServer(FS), ServeContent, and ServeFile(FS) can consume an excessive amount of CPU.
Quoted source text, attributed separately from HOL analysis.