CVE-2026-53754

Crawl4AI is an open-source LLM friendly web crawler & scraper. Prior to 0.8.8, the Docker API server's SSRF protection (validate_webhook_url / validate_url_destination in deploy/docker/utils.py) used an explicit IPv4/IPv6 CIDR blocklist that missed several address families. An attacker could reach internal services and cloud metadata endpoints (e.g. 169.254.169.254) despite the filter by encoding an internal IPv4 address inside an IPv6 transition form, or by using the IPv6 unspecified address. Because the Docker API is unauthenticated by default (jwt_enabled: false), no credentials are required. This vulnerability is fixed in 0.8.8.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/unclecode/crawl4ai/security/advisories/GHSA-4qqr-vv2q-cmr5	Third Party Advisory Mitigation

Configurations

Configuration 1 (hide)

cpe:2.3:a:kidocode:crawl4ai:*:*:*:*:*:*:*:*

History

25 Oct 2026, 23:10

Type	Values Removed	Values Added
Summary		(es) Crawl4AI es un rastreador y extractor web de código abierto compatible con LLM. Antes de la versión 0.8.8, la protección SSRF del servidor API de Docker (validate_webhook_url / validate_url_destination en deploy/docker/utils.py) utilizaba una lista de bloqueo CIDR IPv4/IPv6 explícita que omitía varias familias de direcciones. Un atacante podía alcanzar servicios internos y puntos finales de metadatos en la nube (p. ej., 169.254.169.254) a pesar del filtro, codificando una dirección IPv4 interna dentro de un formato de transición IPv6, o utilizando la dirección no especificada de IPv6. Dado que la API de Docker no está autenticada por defecto (jwt_enabled: false), no se requieren credenciales. Esta vulnerabilidad está corregida en la versión 0.8.8.

Information

Published : 2026-06-23 19:17

Updated : 2026-10-25 23:10

NVD link : CVE-2026-53754

Mitre link : CVE-2026-53754

CVE.ORG link : CVE-2026-53754

JSON object : View

Products Affected

kidocode

crawl4ai

CWE

CWE-918

Server-Side Request Forgery (SSRF)

{"id": "CVE-2026-53754", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-53754", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-23T18:54:04.711472Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "unclecode", "product": "crawl4ai", "versions": [{"status": "affected", "version": "< 0.8.8"}]}]}], "published": "2026-06-23T19:17:07.303", "references": [{"url": "https://github.com/unclecode/crawl4ai/security/advisories/GHSA-4qqr-vv2q-cmr5", "tags": ["Third Party Advisory", "Mitigation"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-918"}]}], "descriptions": [{"lang": "en", "value": "Crawl4AI is an open-source LLM friendly web crawler & scraper. Prior to 0.8.8, the Docker API server's SSRF protection (validate_webhook_url / validate_url_destination in deploy/docker/utils.py) used an explicit IPv4/IPv6 CIDR blocklist that missed several address families. An attacker could reach internal services and cloud metadata endpoints (e.g. 169.254.169.254) despite the filter by encoding an internal IPv4 address inside an IPv6 transition form, or by using the IPv6 unspecified address. Because the Docker API is unauthenticated by default (jwt_enabled: false), no credentials are required. This vulnerability is fixed in 0.8.8."}, {"lang": "es", "value": "Crawl4AI es un rastreador y extractor web de c\u00f3digo abierto compatible con LLM. Antes de la versi\u00f3n 0.8.8, la protecci\u00f3n SSRF del servidor API de Docker (validate_webhook_url / validate_url_destination en deploy/docker/utils.py) utilizaba una lista de bloqueo CIDR IPv4/IPv6 expl\u00edcita que omit\u00eda varias familias de direcciones. Un atacante pod\u00eda alcanzar servicios internos y puntos finales de metadatos en la nube (p. ej., 169.254.169.254) a pesar del filtro, codificando una direcci\u00f3n IPv4 interna dentro de un formato de transici\u00f3n IPv6, o utilizando la direcci\u00f3n no especificada de IPv6. Dado que la API de Docker no est\u00e1 autenticada por defecto (jwt_enabled: false), no se requieren credenciales. Esta vulnerabilidad est\u00e1 corregida en la versi\u00f3n 0.8.8."}], "lastModified": "2026-10-25T23:10:00.167", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:kidocode:crawl4ai:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "90CC6E6D-1EFB-46A5-990C-F095A97185EE", "versionEndExcluding": "0.8.8"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}