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.
Fix
Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.
Change history 3
- StatusPublished → DeferredNVD modified 2026-10-22 16:53
- StatusReceived → PublishedNVD modified 2026-10-22 13:20
- First seenCVSS 5.3NVD modified 2026-10-22 14:17
Affected (CPE criteria) 0
NVD has not attached CPE configurations yet.
References 4
- https://gist.github.com/mansurmavlankulov/47cb8e183fec39a7afe599d1082a3399
- https://github.com/crawlseo/crawlseo/commit/76e4e693de0c6b294cf1f60656800e47346f1c28
- https://github.com/crawlseo/crawlseo/releases?page=1#release-v0.2.4
- https://www.vulncheck.com/advisories/crawlseo-before-server-side-request-forgery-via-crawler