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TI-2026-82637 Aliases CVE-2026-119119GHSA-wh3g-v33g-c47f

Denial of service in Crawl4AI via unbounded CrawlerRunConfig delay fields

Priority HIGH 77CWE-770Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-770.

Summary

Crawl4AI before 0.9.5 contains a denial of service flaw in its Docker API server, where the _clamp_untrusted() function does not cap the delay_before_return_html, mean_delay and max_range fields of untrusted CrawlerRunConfig bodies (CWE-770). An unauthenticated remote attacker can send very large values to /crawl or /crawl/stream to hold browser pages and stall the rate limiter. This exhausts the page pool and blocks other crawls.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

Description from the CNA

Crawl4AI before 0.9.5 contains a denial of service vulnerability in the Docker API server where _clamp_untrusted() fails to cap the delay_before_return_html, mean_delay, and max_range fields of untrusted CrawlerRunConfig bodies. Unauthenticated attackers can send huge values to /crawl or /crawl/stream to hold browser pages or stall the rate limiter, exhausting the page pool and blocking other crawls.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00359 29th percentileScored 2026-11-07
Fix Fixed crawl4ai (unclecode): 0.9.5

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

VendorProductAffected versionsFixed inStatusSource
unclecodecrawl4aibefore 0.9.50.9.5Patch availableCNA
  • crawl4ai Vendorunclecode Affected before 0.9.5 Fixed in 0.9.5 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:kidocode:crawl4ai:*:*:*:*:*:*:*:*——unclecode
  • cpe:2.3:a:kidocode:crawl4ai:*:*:*:*:*:*:*:* Versions — — ·unclecode

Remediation

Upgrade Crawl4AI to version 0.9.5 or later, which fixes the issue. CISA SSVC data reports proof-of-concept exploitation, but the vulnerability is not in CISA KEV.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

  • 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-2026-82640 Blind SSRF in Crawl4AI Docker server via CacheValidator freshness checkPriority HIGH 70
    • 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
    Show all 5 records →

Timeline

  1. 2026-10-29 Threatist record created from CVE-2026-119119
  2. 2026-10-29 Alias added: GHSA-wh3g-v33g-c47f
  3. 2026-10-31 Priority changed: MEDIUM → LOW
  4. 2026-11-04 CISA SSVC decision points changed
  5. 2026-11-04 Priority changed: LOW → HIGH

References

Advisory 1

  • 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-2026-62075 crawl4ai before 0.9.3 Arbitrary File Write via PDFContentScrapingStrategy CVSS 4.0HIGH 8.7
  • TI-2026-82640 Blind SSRF in Crawl4AI Docker server via CacheValidator freshness check CVSS 4.0MEDIUM 6.9
  • 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
See all 32 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences