CVE-2026-78061
Received Received - Intake

Server-Side Request Forgery in vas3k TaxHacker Email Sync

Publication date: 2026-08-23

Last updated on: 2026-08-23

Assigner: VulDB

Description
A vulnerability was determined in vas3k TaxHacker up to 0.8.2. Impacted is the function buildImapConfig of the file lib/email-sync/imap-client.ts of the component Email Sync. Executing a manipulation of the argument host/port can lead to server-side request forgery. It is possible to launch the attack remotely. The pull request to fix this issue awaits acceptance.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-08-23
Last Modified
2026-08-23
Generated
2026-08-23
AI Q&A
2026-08-23
EPSS Evaluated
N/A
NVD
CVE-2026-78061
EUVD
EUVD-2026-64626

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
vas3k taxhacker to 0.8.2 (inc)

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-918 The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability is a Server-Side Request Forgery (SSRF) in the TaxHacker application up to version 0.8.2. It occurs in the function buildImapConfig within the Email Sync component. The issue allows an attacker to manipulate the IMAP server host or port parameters, which are then used to establish a connection without proper validation. This can lead to unauthorized TCP connections to internal or external services, enabling network scanning or firewall bypass.

Detection Guidance

To detect this SSRF vulnerability in TaxHacker, monitor network connections initiated by the application, particularly those targeting IMAP ports (143 or 993). Check logs for unusual outbound connections to localhost, private IP ranges, or unexpected external hosts. Use network monitoring tools like tcpdump or Wireshark to capture IMAP-related traffic from the application.

Impact Analysis

An attacker could exploit this to connect to internal services, scan your network, or bypass firewalls. This may expose sensitive data or internal systems to unauthorized access. The vulnerability allows remote attackers to interact with services they shouldn't have access to, potentially leading to data breaches or further attacks on your infrastructure.

Compliance Impact

The SSRF vulnerability in TaxHacker could potentially expose sensitive financial data processed by the application, which may violate GDPR's data protection requirements if personal data is mishandled or accessed improperly. For HIPAA, if the application were used to process health-related financial transactions, the SSRF flaw could lead to unauthorized access to protected health information, breaching confidentiality rules.

Mitigation Strategies

Apply the pending patch from pull request #170 to enforce IMAP host/port validation. Temporarily disable email sync functionality if the patch is unavailable. Restrict network access to the application to prevent unauthorized outbound connections. Review and update firewall rules to block internal network access from the application.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-78061. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart