TI-2026-71055 Aliases CVE-2026-109239 GHSA-qm8q-557r-p5w7

Blind SSRF in Crawl4AI robots.txt fetch lets attackers reach internal hosts

LOW 36CWE-918Published 2026-10-12 · Updated 2026-10-13

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 0.9.4 contains a blind server-side request forgery flaw in RobotsParser.can_fetch, classified as CWE-918. An unauthenticated remote attacker can enable check_robots_txt and use redirects or DNS rebinding to make the server send requests to internal, loopback, or cloud-metadata addresses, bypassing Docker server egress controls. The flaw is blind: attackers cannot read the responses, but they can use it for service discovery.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

Crawl4AI before 0.9.4 contains a blind server-side request forgery vulnerability in RobotsParser.can_fetch that lets unauthenticated attackers bypass Docker server egress controls. Attackers can enable check_robots_txt and use redirects or DNS rebinding to reach internal, loopback, or cloud-metadata addresses for service discovery.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00265 18th percentileScored 2026-11-07

Fix Fixed crawl4ai (unclecode): 0.9.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
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

Vendor	Product	Affected versions	Fixed in	Status	Source
unclecode	crawl4ai	before 0.9.4	0.9.4	Patch available	CNA

crawl4ai Vendorunclecode Affected before 0.9.4 Fixed in 0.9.4 Patch available CNA

CPE names Threatist (inferred) · 1

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

CPE	Versions	Role	Vendor
cpe:2.3:a:kidocode:crawl4ai::::::::	—	—	unclecode

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

Remediation

Upgrade unclecode crawl4ai to 0.9.4, the fixed version.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Fix · CNA crawl4ai (unclecode) Fixed in 0.9.4

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2026-10-12
unclecode crawl4ai 0.9.4
3 records Highest priority Priority LOW 3 LOW
Other records, highest priority first
- TI-2026-71054 SSRF in Crawl4AI link preview lets attackers reach internal hostsPriority LOW 39
- TI-2026-71053 Crawl4AI config gate bypass leaks environment variablesPriority LOW 39
Show all 3 records →

Timeline

2026-10-12 Threatist record created from CVE-2026-109239
2026-10-12 Alias added: GHSA-qm8q-557r-p5w7
2026-10-13 Priority changed: MEDIUM → LOW
2026-10-13 CISA SSVC decision points changed

References

Advisory 1

GitHub Security Advisory (GHSA-f77g-77vp-r96v)

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-2026-82640 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

See all 32 →

Sources

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