CVE-2026-108522
Received Received - Intake

Authentication Bypass in Studio-Saelix Sencho via X-Forwarded-For

Publication date: 2026-10-11

Last updated on: 2026-10-11

Assigner: VulDB

Description
A vulnerability was found in Studio-Saelix Sencho up to 0.94.1. This affects an unknown part of the file /api/auth/login of the component Login Endpoint. Performing a manipulation of the argument X-Forwarded-For results in improper authentication. The attack is possible to be carried out remotely. The exploit has been made public and could be used. The patch is named 79b86ddcd4aefdd6941f098e35990ab397b13c72. To fix this issue, it is recommended to deploy a patch. The vendor confirms: "The login limiter relied on client-supplied X-Forwarded-For data without an explicit trusted-proxy boundary, allowing an attacker to rotate the apparent client address. The remediation now ignores forwarding headers by default, accepts them only from explicitly configured proxy CIDRs, and adds a separate failed-attempt limit keyed by normalized account identity."

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Meta Information

Published
2026-10-11
Last Modified
2026-10-11
Generated
2026-10-11
AI Q&A
2026-10-11
EPSS Evaluated
N/A
NVD
CVE-2026-108522
EUVD
EUVD-2026-96729

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
Studio-Saelix Sencho 0.94.0
Studio-Saelix Sencho 0.94.1

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-287 When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

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Executive Summary

CVE-2026-108522 is an authentication bypass vulnerability in Studio-Saelix Sencho up to version 0.94.1. It affects the login endpoint where the X-Forwarded-For header is manipulated to bypass rate-limiting. The header is used to identify clients, but since it can be spoofed, attackers can rotate it to evade login attempt limits. This allows unlimited password-guessing attempts, potentially leading to account takeover.

Detection Guidance

To detect this vulnerability, monitor login attempts in the Sencho application logs for unusual patterns, such as rapid successive login requests with varying X-Forwarded-For headers. Check if the rate-limiting mechanism is bypassed by observing multiple failed login attempts without account lockouts. Use network monitoring tools to inspect HTTP headers in login requests for spoofed X-Forwarded-For values.

Impact Analysis

If exploited, this vulnerability could allow attackers to bypass login rate limits and perform brute-force attacks on any account, including administrator accounts. With weak or reused passwords, this could lead to full account takeover. Since Sencho manages Docker Compose deployments and has access to /var/run/docker.sock, a compromised account could enable host-level compromise.

Compliance Impact

This vulnerability could impact compliance with GDPR and HIPAA by enabling unauthorized access to sensitive systems. As Sencho manages Docker Compose deployments and has access to /var/run/docker.sock, a successful exploit could lead to host-level compromise, potentially exposing personal or health data. Weak authentication controls violate principles of least privilege and data protection required by these regulations.

Mitigation Strategies

Immediately update Sencho to the patched version using the commit 79b86ddcd4aefdd6941f098e35990ab397b13c72. Configure the SENCHO_TRUSTED_PROXY_CIDRS environment variable to specify trusted reverse proxy CIDRs. Ensure the application ignores forwarded headers unless explicitly trusted. Implement account-based rate limiting as an additional layer of security.

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