Answer in brief
CVE-2025-71470 records a Medium severity (CVSS 6.8) vulnerability in MicroQuickJS before commit 99eed3f Out-of-Bounds Read in build_backtrace. The current sources do not mark it as known exploited. The current feed maps bellard/mquickjs (generic). 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 6.8. 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 bellard/mquickjs (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| bellard/mquickjsgeneric | >=0 <99eed3f94cb66ea7e02fd3472ca7374dee31bb89 | 99eed3f94cb66ea7e02fd3472ca7374dee31bb89 |
Published upstream
Nov 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 15, 2026
MicroQuickJS (mquickjs) before commit 99eed3f contains an out-of-bounds read vulnerability because JS_Call() raises exceptions during frame setup without updating ctx->sp and ctx->fp. Attackers can supply JavaScript that calls a non-function value, causing build_backtrace() to walk stale frame pointers and crash the engine for denial of service.
Quoted source text, attributed separately from HOL analysis.