Web Application Vulnerabilities Runtime SCA Findings
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EspoCRM Server-Side Request Forgery (SSRF) Vulnerability - CVE-2026-88896 - Vulnerability Database
EspoCRM

EspoCRM Server-Side Request Forgery (SSRF) Vulnerability - CVE-2026-88896

Medium
Reference: CVE-2026-88896
NVD Link: https://nvd.nist.gov/vuln/detail/CVE-2026-88896
Title: EspoCRM Server-Side Request Forgery (SSRF) Vulnerability
Overview:

EspoCRM before 10.0.4 is vulnerable to server-side request forgery. HostCheck::ipAddressIsNotInternal() which validates outbound URLs to block requests to internal/private IP addresses strips ::ffff: (IPv4-mapped IPv6) prefixes but does not recognize IPv6 transition addresses that embed private IPv4 addresses: NAT64 (64:ff9b::) 6to4 (2002::) and Teredo (2001:0000::). An attacker who controls a domain with AAAA records pointing to such transition addresses can bypass both the internal-host va