Blind SSRF in Crawl4AI Docker server via CacheValidator freshness check
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-918 and the CVSS impact.
Summary
Crawl4AI before 0.9.5 contains a blind server-side request forgery flaw in its Docker server, tracked as CWE-918. An API client can bypass the egress proxy by enabling check_cache_freshness, so an unauthenticated remote attacker can cache a controlled URL and make the server follow 302 redirects or DNS rebinding to internal and cloud-metadata addresses. The attacker receives no response data, so the flaw is used for port and service discovery.
Written with Claude Haiku 5.5 from the sources below · 2026-10-30
Description from the CNA
Crawl4AI before 0.9.5 contains a blind server-side request forgery vulnerability in the Docker server that allows API clients to bypass the egress proxy by enabling check_cache_freshness. Attackers can cache a controlled URL, then trigger CacheValidator to follow 302 redirects or DNS rebinding to internal and cloud-metadata addresses for port and service discovery.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
Update crawl4ai to version 0.9.5, which fixes the flaw.
Written with Claude Haiku 5.5 from the sources below · 2026-10-30
- Fix · CNA crawl4ai (unclecode) Fixed in 0.9.5
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
unclecode crawl4ai 0.9.5
5 records Highest priority Priority HIGH 4 HIGH, 1 LOW
Other records, highest priority first
- TI-2026-82637 Denial of service in Crawl4AI via unbounded CrawlerRunConfig delay fieldsPriority HIGH 77
- TI-2026-82638 Untrusted model loading in Crawl4AI via CosineStrategy model_namePriority HIGH 69
- TI-2026-82636 Crawl4AI ignores certificate errors, enabling interception of crawlsPriority HIGH 69
Timeline
- 2026-10-29 Threatist record created from CVE-2026-119122
- 2026-10-29 Alias added: GHSA-3mhc-98p7-hp8w
- 2026-10-29 CISA SSVC decision points changed
- 2026-10-29 Priority changed: MEDIUM → HIGH
References
More unclecode vulnerabilities
- TI-2026-38760 Crawl4AI: AST Sandbox Escape via gi_frame.f_back Chain - Pre-Auth RCE in Docker API CVSS 3.1CRITICAL 10.0
- TI-2026-40630 Crawl4AI - Authentication Bypass via Hardcoded JWT Signing Key CVSS 4.0CRITICAL 9.3
- TI-2026-82637 Denial of service in Crawl4AI via unbounded CrawlerRunConfig delay fields CVSS 4.0HIGH 8.7
- TI-2026-62075 crawl4ai before 0.9.3 Arbitrary File Write via PDFContentScrapingStrategy CVSS 4.0HIGH 8.7
- TI-2026-82638 Untrusted model loading in Crawl4AI via CosineStrategy model_name CVSS 4.0HIGH 7.7
- TI-2026-82636 Crawl4AI ignores certificate errors, enabling interception of crawls CVSS 4.0HIGH 8.3
Sources
- CVE-2026-119122 · CVE Program
- CVE-2026-119122 · NVD
- FIRST EPSS
- GHSA-3mhc-98p7-hp8w · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences