Answer in brief
CVE-2026-58483 records a High severity (CVSS 7.5) vulnerability in mcp-searxng: Unbounded Response Body Read Bypasses URL Size Limit in `web_url_read`. The current sources do not mark it as known exploited. The current feed maps ihor-sokoliuk/mcp-searxng (generic), mcp-searxng (npm), mcp-searxng (npm). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.5. 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 ihor-sokoliuk/mcp-searxng (generic), mcp-searxng (npm), mcp-searxng (npm). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| ihor-sokoliuk/mcp-searxnggeneric | < 1.7.1 | Not reported |
| mcp-searxngnpm | <1.7.1 | 1.7.1 |
| mcp-searxngnpm | >=0 <1.7.1 | 1.7.1 |
Published upstream
Sep 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 19, 2026
mcp-searxng is a Model Context Protocol server that gives AI assistants web search and URL-reading capabilities through SearXNG. Prior to 1.7.1, web_url_read in src/index.ts passes a caller-supplied URL to readUrlContent() in src/url-reader.ts, where checkContentLength() treats a missing Content-Length header as an inconclusive preflight and the normal and error paths then consume the complete body with response.text(). A server that omits Content-Length can therefore bypass URL_READ_MAX_CONTENT_LENGTH_BYTES and force unbounded memory use. The resulting string is also processed by NodeHtmlMarkdown.translate(), increasing CPU consumption and allowing an unauthenticated HTTP client to cause denial of service. This issue is fixed in version 1.7.1.
Quoted source text, attributed separately from HOL analysis.