Answer in brief
CVE-2026-3490 records a Critical severity (CVSS 10.0) vulnerability in picklescan - Universal Blocklist Bypass via pkgutil.resolve_name. The current sources do not mark it as known exploited. The current feed maps picklescan/picklescan (generic), picklescan (pip). 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 10.0. 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 picklescan/picklescan (generic), picklescan (pip). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| picklescan/picklescangeneric | >=0 <1.0.4 | 1.0.4 |
| picklescanpip | <1.0.4 | 1.0.4 |
Published upstream
Jun 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 19, 2026
picklescan before 1.0.4 fails to block pkgutil.resolve_name, allowing attackers to bypass the entire blocklist by resolving any dangerous function through indirect REDUCE calls. Remote attackers can invoke any blocked function such as os.system, builtins.exec, or subprocess.call to achieve remote code execution.
Quoted source text, attributed separately from HOL analysis.