Description
crawlseo before version 0.2.4 contains a server-side request forgery vulnerability in its crawler engine where isPrivateIp() fails to block reserved IP ranges such as RFC 6598 Carrier-Grade NAT, RFC 6890, TEST-NET ranges and certain IPv6 addresses, and additionally fails to pin the validated address for the actual outbound connection, allowing a TOCTOU DNS rebinding bypass. An authenticated attacker can add a malicious domain that resolves to an internal or restricted address, trigger a crawl to reach internal services or cloud metadata endpoints like 169.254.169.254, and retrieve the fetched page's title, description, headings, status code and links through the crawl results API, enabling internal network reconnaissance.
Published: 2026-10-22
Score: 5.3 Medium
EPSS: n/a
KEV: No
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Thu, 22 Oct 2026 13:30:00 +0000

Type Values Removed Values Added
Description crawlseo before version 0.2.4 contains a server-side request forgery vulnerability in its crawler engine where isPrivateIp() fails to block reserved IP ranges such as RFC 6598 Carrier-Grade NAT, RFC 6890, TEST-NET ranges and certain IPv6 addresses, and additionally fails to pin the validated address for the actual outbound connection, allowing a TOCTOU DNS rebinding bypass. An authenticated attacker can add a malicious domain that resolves to an internal or restricted address, trigger a crawl to reach internal services or cloud metadata endpoints like 169.254.169.254, and retrieve the fetched page's title, description, headings, status code and links through the crawl results API, enabling internal network reconnaissance.
Title crawlseo before 0.2.4 Server-Side Request Forgery via Crawler
First Time appeared Crawlseo
Crawlseo crawlseo
Weaknesses CWE-918
CPEs cpe:2.3:a:crawlseo:crawlseo:*:*:*:*:*:*:*:*
Vendors & Products Crawlseo
Crawlseo crawlseo
References
Metrics cvssV3_1

{'score': 5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N'}

cvssV4_0

{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N'}


Subscriptions

Crawlseo Crawlseo
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-22T13:20:01.875Z

Reserved: 2026-10-22T12:20:48.706Z

Link: CVE-2026-115411

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-10-22T14:17:39.337

Modified: 2026-10-22T16:53:20.563

Link: CVE-2026-115411

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-22T15:15:07Z

Weaknesses
  • CWE-918

    Server-Side Request Forgery (SSRF)