f6f7f1b551
* Fix: Use correct URL variable for raw HTML extraction (#1116) - Prevents full HTML content from being passed as URL to extraction strategies - Added unit tests to verify raw HTML and regular URL processing Fix: Wrong URL variable used for extraction of raw html * Fix #1181: Preserve whitespace in code blocks during HTML scraping The remove_empty_elements_fast() method was removing whitespace-only span elements inside <pre> and <code> tags, causing import statements like "import torch" to become "importtorch". Now skips elements inside code blocks where whitespace is significant. * Refactor Pydantic model configuration to use ConfigDict for arbitrary types * Fix EmbeddingStrategy: Uncomment response handling for the variations and clean up mock data. ref #1621 * Fix: permission issues with .cache/url_seeder and other runtime cache dirs. ref #1638 * fix: ensure BrowserConfig.to_dict serializes proxy_config * feat: make LLM backoff configurable end-to-end - extend LLMConfig with backoff delay/attempt/factor fields and thread them through LLMExtractionStrategy, LLMContentFilter, table extraction, and Docker API handlers - expose the backoff parameter knobs on perform_completion_with_backoff/aperform_completion_with_backoff and document them in the md_v2 guides * reproduced AttributeError from #1642 * pass timeout parameter to docker client request * added missing deep crawling objects to init * generalized query in ContentRelevanceFilter to be a str or list * import modules from enhanceable deserialization * parameterized tests * Fix: capture current page URL to reflect JavaScript navigation and add test for delayed redirects. ref #1268 * refactor: replace PyPDF2 with pypdf across the codebase. ref #1412 * Add browser_context_id and target_id parameters to BrowserConfig Enable Crawl4AI to connect to pre-created CDP browser contexts, which is essential for cloud browser services that pre-create isolated contexts. Changes: - Add browser_context_id and target_id parameters to BrowserConfig - Update from_kwargs() and to_dict() methods - Modify BrowserManager.start() to use existing context when provided - Add _get_page_by_target_id() helper method - Update get_page() to handle pre-existing targets - Add test for browser_context_id functionality This enables cloud services to: 1. Create isolated CDP contexts before Crawl4AI connects 2. Pass context/target IDs to BrowserConfig 3. Have Crawl4AI reuse existing contexts instead of creating new ones * Add cdp_cleanup_on_close flag to prevent memory leaks in cloud/server scenarios * Fix: add cdp_cleanup_on_close to from_kwargs * Fix: find context by target_id for concurrent CDP connections * Fix: use target_id to find correct page in get_page * Fix: use CDP to find context by browserContextId for concurrent sessions * Revert context matching attempts - Playwright cannot see CDP-created contexts * Add create_isolated_context flag for concurrent CDP crawls When True, forces creation of a new browser context instead of reusing the default context. Essential for concurrent crawls on the same browser to prevent navigation conflicts. * Add context caching to create_isolated_context branch Uses contexts_by_config cache (same as non-CDP mode) to reuse contexts for multiple URLs with same config. Still creates new page per crawl for navigation isolation. Benefits batch/deep crawls. * Add init_scripts support to BrowserConfig for pre-page-load JS injection This adds the ability to inject JavaScript that runs before any page loads, useful for stealth evasions (canvas/audio fingerprinting, userAgentData). - Add init_scripts parameter to BrowserConfig (list of JS strings) - Apply init_scripts in setup_context() via context.add_init_script() - Update from_kwargs() and to_dict() for serialization * Fix CDP connection handling: support WS URLs and proper cleanup Changes to browser_manager.py: 1. _verify_cdp_ready(): Support multiple URL formats - WebSocket URLs (ws://, wss://): Skip HTTP verification, Playwright handles directly - HTTP URLs with query params: Properly parse with urlparse to preserve query string - Fixes issue where naive f"{cdp_url}/json/version" broke WS URLs and query params 2. close(): Proper cleanup when cdp_cleanup_on_close=True - Close all sessions (pages) - Close all contexts - Call browser.close() to disconnect (doesn't terminate browser, just releases connection) - Wait 1 second for CDP connection to fully release - Stop Playwright instance to prevent memory leaks This enables: - Connecting to specific browsers via WS URL - Reusing the same browser with multiple sequential connections - No user wait needed between connections (internal 1s delay handles it) Added tests/browser/test_cdp_cleanup_reuse.py with comprehensive tests. * Update gitignore * Some debugging for caching * Add _generate_screenshot_from_html for raw: and file:// URLs Implements the missing method that was being called but never defined. Now raw: and file:// URLs can generate screenshots by: 1. Loading HTML into a browser page via page.set_content() 2. Taking screenshot using existing take_screenshot() method 3. Cleaning up the page afterward This enables cached HTML to be rendered with screenshots in crawl4ai-cloud. * Add PDF and MHTML support for raw: and file:// URLs - Replace _generate_screenshot_from_html with _generate_media_from_html - New method handles screenshot, PDF, and MHTML in one browser session - Update raw: and file:// URL handlers to use new method - Enables cached HTML to generate all media types * Add crash recovery for deep crawl strategies Add optional resume_state and on_state_change parameters to all deep crawl strategies (BFS, DFS, Best-First) for cloud deployment crash recovery. Features: - resume_state: Pass saved state to resume from checkpoint - on_state_change: Async callback fired after each URL for real-time state persistence to external storage (Redis, DB, etc.) - export_state(): Get last captured state manually - Zero overhead when features are disabled (None defaults) State includes visited URLs, pending queue/stack, depths, and pages_crawled count. All state is JSON-serializable. * Fix: HTTP strategy raw: URL parsing truncates at # character The AsyncHTTPCrawlerStrategy.crawl() method used urlparse() to extract content from raw: URLs. This caused HTML with CSS color codes like #eee to be truncated because # is treated as a URL fragment delimiter. Before: raw:body{background:#eee} -> parsed.path = 'body{background:' After: raw:body{background:#eee} -> raw_content = 'body{background:#eee' Fix: Strip the raw: or raw:// prefix directly instead of using urlparse, matching how the browser strategy handles it. * Add base_url parameter to CrawlerRunConfig for raw HTML processing When processing raw: HTML (e.g., from cache), the URL parameter is meaningless for markdown link resolution. This adds a base_url parameter that can be set explicitly to provide proper URL resolution context. Changes: - Add base_url parameter to CrawlerRunConfig.__init__ - Add base_url to CrawlerRunConfig.from_kwargs - Update aprocess_html to use base_url for markdown generation Usage: config = CrawlerRunConfig(base_url='https://example.com') result = await crawler.arun(url='raw:{html}', config=config) * Add prefetch mode for two-phase deep crawling - Add `prefetch` parameter to CrawlerRunConfig - Add `quick_extract_links()` function for fast link extraction - Add short-circuit in aprocess_html() for prefetch mode - Add 42 tests (unit, integration, regression) 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com> * Updates on proxy rotation and proxy configuration * Add proxy support to HTTP crawler strategy * Add browser pipeline support for raw:/file:// URLs - Add process_in_browser parameter to CrawlerRunConfig - Route raw:/file:// URLs through _crawl_web() when browser operations needed - Use page.set_content() instead of goto() for local content - Fix cookie handling for non-HTTP URLs in browser_manager - Auto-detect browser requirements: js_code, wait_for, screenshot, etc. - Maintain fast path for raw:/file:// without browser params Fixes #310 * Add smart TTL cache for sitemap URL seeder - Add cache_ttl_hours and validate_sitemap_lastmod params to SeedingConfig - New JSON cache format with metadata (version, created_at, lastmod, url_count) - Cache validation by TTL expiry and sitemap lastmod comparison - Auto-migration from old .jsonl to new .json format - Fixes bug where incomplete cache was used indefinitely * Update URL seeder docs with smart TTL cache parameters - Add cache_ttl_hours and validate_sitemap_lastmod to parameter table - Document smart TTL cache validation with examples - Add cache-related troubleshooting entries - Update key features summary * Add MEMORY.md to gitignore * Docs: Add multi-sample schema generation section Add documentation explaining how to pass multiple HTML samples to generate_schema() for stable selectors that work across pages with varying DOM structures. Includes: - Problem explanation (fragile nth-child selectors) - Solution with code example - Key points for multi-sample queries - Comparison table of fragile vs stable selectors * Fix critical RCE and LFI vulnerabilities in Docker API deployment Security fixes for vulnerabilities reported by ProjectDiscovery: 1. Remote Code Execution via Hooks (CVE pending) - Remove __import__ from allowed_builtins in hook_manager.py - Prevents arbitrary module imports (os, subprocess, etc.) - Hooks now disabled by default via CRAWL4AI_HOOKS_ENABLED env var 2. Local File Inclusion via file:// URLs (CVE pending) - Add URL scheme validation to /execute_js, /screenshot, /pdf, /html - Block file://, javascript:, data: and other dangerous schemes - Only allow http://, https://, and raw: (where appropriate) 3. Security hardening - Add CRAWL4AI_HOOKS_ENABLED=false as default (opt-in for hooks) - Add security warning comments in config.yml - Add validate_url_scheme() helper for consistent validation Testing: - Add unit tests (test_security_fixes.py) - 16 tests - Add integration tests (run_security_tests.py) for live server Affected endpoints: - POST /crawl (hooks disabled by default) - POST /crawl/stream (hooks disabled by default) - POST /execute_js (URL validation added) - POST /screenshot (URL validation added) - POST /pdf (URL validation added) - POST /html (URL validation added) Breaking changes: - Hooks require CRAWL4AI_HOOKS_ENABLED=true to function - file:// URLs no longer work on API endpoints (use library directly) * Enhance authentication flow by implementing JWT token retrieval and adding authorization headers to API requests * Add release notes for v0.7.9, detailing breaking changes, security fixes, new features, bug fixes, and documentation updates * Add release notes for v0.8.0, detailing breaking changes, security fixes, new features, bug fixes, and documentation updates Documentation for v0.8.0 release: - SECURITY.md: Security policy and vulnerability reporting guidelines - RELEASE_NOTES_v0.8.0.md: Comprehensive release notes - migration/v0.8.0-upgrade-guide.md: Step-by-step migration guide - security/GHSA-DRAFT-RCE-LFI.md: GitHub security advisory drafts - CHANGELOG.md: Updated with v0.8.0 changes Breaking changes documented: - Docker API hooks disabled by default (CRAWL4AI_HOOKS_ENABLED) - file:// URLs blocked on Docker API endpoints Security fixes credited to Neo by ProjectDiscovery * Add examples for deep crawl crash recovery and prefetch mode in documentation * Release v0.8.0: The v0.8.0 Update - Updated version to 0.8.0 - Added comprehensive demo and release notes - Updated all documentation * Update security researcher acknowledgment with a hyperlink for Neo by ProjectDiscovery * Add async agenerate_schema method for schema generation - Extract prompt building to shared _build_schema_prompt() method - Add agenerate_schema() async version using aperform_completion_with_backoff - Refactor generate_schema() to use shared prompt builder - Fixes Gemini/Vertex AI compatibility in async contexts (FastAPI) * Fix: Enable litellm.drop_params for O-series/GPT-5 model compatibility O-series (o1, o3) and GPT-5 models only support temperature=1. Setting litellm.drop_params=True auto-drops unsupported parameters instead of throwing UnsupportedParamsError. Fixes temperature=0.01 error for these models in LLM extraction. --------- Co-authored-by: rbushria <rbushri@gmail.com> Co-authored-by: AHMET YILMAZ <tawfik@kidocode.com> Co-authored-by: Soham Kukreti <kukretisoham@gmail.com> Co-authored-by: Chris Murphy <chris.murphy@klaviyo.com> Co-authored-by: unclecode <unclecode@kidocode.com> Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
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Crawl4AI v0.8.0 Release Notes
Release Date: January 2026 Previous Version: v0.7.6 Status: Release Candidate
Highlights
- Critical Security Fixes for Docker API deployment
- 11 New Features including crash recovery, prefetch mode, and proxy improvements
- Breaking Changes - see migration guide below
Breaking Changes
1. Docker API: Hooks Disabled by Default
What changed: Hooks are now disabled by default on the Docker API.
Why: Security fix for Remote Code Execution (RCE) vulnerability.
Who is affected: Users of the Docker API who use the hooks parameter in /crawl requests.
Migration:
# To re-enable hooks (only if you trust all API users):
export CRAWL4AI_HOOKS_ENABLED=true
2. Docker API: file:// URLs Blocked
What changed: The endpoints /execute_js, /screenshot, /pdf, and /html now reject file:// URLs.
Why: Security fix for Local File Inclusion (LFI) vulnerability.
Who is affected: Users who were reading local files via the Docker API.
Migration: Use the Python library directly for local file processing:
# Instead of API call with file:// URL, use library:
from crawl4ai import AsyncWebCrawler
async with AsyncWebCrawler() as crawler:
result = await crawler.arun(url="file:///path/to/file.html")
Security Fixes
Critical: Remote Code Execution via Hooks (CVE Pending)
Severity: CRITICAL (CVSS 10.0)
Affected: Docker API deployment (all versions before v0.8.0)
Vector: POST /crawl with malicious hooks parameter
Details: The __import__ builtin was available in hook code, allowing attackers to import os, subprocess, etc. and execute arbitrary commands.
Fix:
- Removed
__import__from allowed builtins - Hooks disabled by default (
CRAWL4AI_HOOKS_ENABLED=false)
High: Local File Inclusion via file:// URLs (CVE Pending)
Severity: HIGH (CVSS 8.6)
Affected: Docker API deployment (all versions before v0.8.0)
Vector: POST /execute_js (and other endpoints) with file:///etc/passwd
Details: API endpoints accepted file:// URLs, allowing attackers to read arbitrary files from the server.
Fix: URL scheme validation now only allows http://, https://, and raw: URLs.
Credits
Discovered by Neo by ProjectDiscovery (projectdiscovery.io) - December 2025
New Features
1. init_scripts Support for BrowserConfig
Pre-page-load JavaScript injection for stealth evasions.
config = BrowserConfig(
init_scripts=[
"Object.defineProperty(navigator, 'webdriver', {get: () => false})"
]
)
2. CDP Connection Improvements
- WebSocket URL support (
ws://,wss://) - Proper cleanup with
cdp_cleanup_on_close=True - Browser reuse across multiple connections
3. Crash Recovery for Deep Crawl Strategies
All deep crawl strategies (BFS, DFS, Best-First) now support crash recovery:
from crawl4ai.deep_crawling import BFSDeepCrawlStrategy
strategy = BFSDeepCrawlStrategy(
max_depth=3,
resume_state=saved_state, # Resume from checkpoint
on_state_change=save_callback # Persist state in real-time
)
4. PDF and MHTML for raw:/file:// URLs
Generate PDFs and MHTML from cached HTML content.
5. Screenshots for raw:/file:// URLs
Render cached HTML and capture screenshots.
6. base_url Parameter for CrawlerRunConfig
Proper URL resolution for raw: HTML processing:
config = CrawlerRunConfig(base_url='https://example.com')
result = await crawler.arun(url='raw:{html}', config=config)
7. Prefetch Mode for Two-Phase Deep Crawling
Fast link extraction without full page processing:
config = CrawlerRunConfig(prefetch=True)
8. Proxy Rotation and Configuration
Enhanced proxy rotation with sticky sessions support.
9. Proxy Support for HTTP Strategy
Non-browser crawler now supports proxies.
10. Browser Pipeline for raw:/file:// URLs
New process_in_browser parameter for browser operations on local content:
config = CrawlerRunConfig(
process_in_browser=True, # Force browser processing
screenshot=True
)
result = await crawler.arun(url='raw:<html>...</html>', config=config)
11. Smart TTL Cache for Sitemap URL Seeder
Intelligent cache invalidation for sitemaps:
config = SeedingConfig(
cache_ttl_hours=24,
validate_sitemap_lastmod=True
)
Bug Fixes
raw: URL Parsing Truncates at # Character
Problem: CSS color codes like #eee were being truncated.
Before: raw:body{background:#eee} → body{background:
After: raw:body{background:#eee} → body{background:#eee}
Caching System Improvements
Various fixes to cache validation and persistence.
Documentation Updates
- Multi-sample schema generation documentation
- URL seeder smart TTL cache parameters
- Security documentation (SECURITY.md)
Upgrade Guide
From v0.7.x to v0.8.0
-
Update the package:
pip install --upgrade crawl4ai -
Docker API users:
- Hooks are now disabled by default
- If you need hooks:
export CRAWL4AI_HOOKS_ENABLED=true file://URLs no longer work on API (use library directly)
-
Review security settings:
# config.yml - recommended for production security: enabled: true jwt_enabled: true -
Test your integration before deploying to production
Breaking Change Checklist
- Check if you use
hooksparameter in API calls - Check if you use
file://URLs via the API - Update environment variables if needed
- Review security configuration
Full Changelog
See CHANGELOG.md for complete version history.
Contributors
Thanks to all contributors who made this release possible.
Special thanks to Neo by ProjectDiscovery for responsible security disclosure.
For questions or issues, please open a GitHub Issue.