{"version":"2.0.31","anchor":"enhanced-sed-command-validation","canonical_anchor":"enhanced-sed-command-validation","heading":"Enhanced Sed Command Validation","tier":null,"area":null,"scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.0.31\/e\/enhanced-sed-command-validation","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.0.31","markdown":"### Enhanced Sed Command Validation\n\n**What:** Significantly improved security validation for sed commands to prevent dangerous operations while allowing safe read-only usage.\n\n**How it works:** The validation now uses a comprehensive whitelist approach with multiple layers:\n\n- **Pre-parsing flag detection** - Blocks dangerous flag combinations like `-ew`, `-we` before parsing\n- **Whitelist validation** - Only allows two safe patterns:\n\n- Print-only operations with `-n` flag (e.g., `sed -n '1,10p' file.txt`)\n- Simple substitutions with safe flags (e.g., `sed 's\/old\/new\/' file.txt`)\n\n- **Comprehensive blacklist** - Blocks 15+ dangerous patterns including:\n\n- Write commands (`w`, `W`)\n- Execute commands (`e`, `E`)\n- Non-ASCII characters and escape sequences\n- Command chaining with semicolons in certain contexts\n- Braces, negation operators, and other advanced features\n\n**Details:**\n\n- Builds upon existing sed validation from v2.0.30 (function `hoB` at line 209135)\n- Adds four new validation helpers: `Aj8()` at line 209202, `Bj8()` at line 209245, `Qj8()` at line 209254, `Zj8()` at line 209384\n- New validation function `JtB()` at line 209288 replaces `hoB`\n- Dangerous flag combination detection in `Gj8()` at line 209345\n- Prevents file modification and command execution while allowing safe text processing\n- **Evidence**: Comparison of `hoB()` at line 209135 in v2.0.30 vs `JtB()` at line 209288 in v2.0.31"}