0.9.8
A server-side request forgery (SSRF) vulnerability has been identified in ApiFlow versions 0.9.7. This flaw resides within the validateUrlSecurity function of the http_proxy.service.ts file, impacting the URL Validation Handler component. Successful exploitation could allow an attacker to initiate requests on behalf of the server, potentially leading to unauthorized access to internal resources and data exposure. The vulnerability is publicly disclosed and poses a significant risk.
The SSRF vulnerability in ApiFlow allows attackers to craft malicious requests that appear to originate from the ApiFlow server itself. This can be exploited to access internal services and resources that are not directly exposed to the internet. For example, an attacker could potentially access internal databases, configuration files, or other sensitive data. Furthermore, the attacker could leverage the vulnerability to scan the internal network for other vulnerable systems, facilitating lateral movement and expanding the attack surface. The ability to initiate requests on behalf of the server grants a significant degree of control and poses a substantial risk to the confidentiality and integrity of the affected environment.
This vulnerability has been publicly disclosed, increasing the likelihood of exploitation. While no specific exploit details beyond the SSRF nature are readily available, the public disclosure significantly elevates the risk. The vulnerability is not currently listed on CISA KEV as of this writing. Public proof-of-concept code is expected to emerge given the disclosure.
Exploit Status
EPSS
0.05% (16% percentile)
CISA SSVC
CVSS Vector
The primary mitigation for CVE-2026-4528 is to upgrade ApiFlow to a patched version as soon as it becomes available. Until a patch is released, consider implementing temporary workarounds to reduce the attack surface. These may include restricting outbound network access from the ApiFlow server to only necessary destinations, implementing strict URL validation and sanitization on the server-side, and utilizing a Web Application Firewall (WAF) to filter malicious requests. Regularly monitor logs for suspicious activity and implement intrusion detection systems to identify and respond to potential attacks. After upgrade, confirm functionality by testing URL validation and proxy behavior.
Update to a corrected version of ApiFlow that resolves the Server-Side Request Forgery (SSRF) vulnerability in the validateUrlSecurity function. Consult the release notes or contact the vendor for the updated version and installation instructions.
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CVE-2026-4528 is a server-side request forgery vulnerability in ApiFlow versions 0.9.7, allowing attackers to initiate requests on behalf of the server.
If you are using ApiFlow version 0.9.7, you are potentially affected by this vulnerability. Upgrade as soon as a patch is available.
The recommended fix is to upgrade to a patched version of ApiFlow. Until then, implement temporary workarounds like restricting outbound network access and using a WAF.
The vulnerability has been publicly disclosed, increasing the likelihood of exploitation. Active exploitation is possible.
Refer to the official ApiFlow project's website or security advisories for the latest information and updates regarding CVE-2026-4528.
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