CVE-2026-115411 Details
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.
A server-side request forgery (SSRF) vulnerability has been identified in Crawlseo versions prior to 0.2.4. The issue arises in the crawler engine, where the isPrivateIp() function fails to block reserved IP ranges, including RFC 6598 Carrier-Grade NAT, RFC 6890, TEST-NET ranges, and certain IPv6 addresses. Additionally, it does not pin the validated address for the actual outbound connection, creating a time-of-check to time-of-use (TOCTOU) DNS rebinding bypass. An authenticated attacker can exploit this by adding a malicious domain that resolves to an internal or restricted address, triggering a crawl that accesses internal services or cloud metadata endpoints, such as 169.254.169.254. The attacker can then retrieve the fetched page's title, description, headings, status code, and links through the crawl results API, facilitating internal network reconnaissance.
Users can upgrade to Crawlseo version 0.2.6 or later, where this vulnerability has been patched.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 22, 2026CISA-ADP
Assessed Oct 29, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://gist.github.com/mansurmavlankulov/47cb8e183fec39a7afe599d1082a3399 | [email protected] | BundleExploitTechnical Analysis |
| https://github.com/crawlseo/crawlseo/commit/76e4e693de0c6b294cf1f60656800e47346f1c28 | [email protected] | Source CodeVendor |
| https://github.com/crawlseo/crawlseo/releases?page=1#release-v0.2.4 | [email protected] | Release NotesVendor |
| https://www.vulncheck.com/advisories/crawlseo-before-server-side-request-forgery-via-crawler | [email protected] | AdvisoryRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-918 | Server-Side Request Forgery (SSRF) | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| crawlseo | < 0.2.4 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 29, 2026 | CVE Modified | CISA-ADP |
| Oct 22, 2026 | New CVE Received | [email protected] |