vas3k TaxHacker up to 0.8.2 JWT Secret lib/config.ts envSchema.parse BETTER_AUTH_SECRET hard-coded credentials

Summaryinfo

A vulnerability was found in vas3k TaxHacker up to 0.8.2. It has been declared as critical. The impacted element is the function envSchema.parse of the file lib/config.ts of the component JWT Secret Handler. The manipulation of the argument BETTER_AUTH_SECRET results in hard-coded credentials. This vulnerability is reported as CVE-2026-78062. The attack can be launched remotely. Moreover, an exploit is present. The project was informed of the problem early through an issue report but has not responded yet.

Detailsinfo

A vulnerability, which was classified as critical, was found in vas3k TaxHacker up to 0.8.2. Affected is the function envSchema.parse of the file lib/config.ts of the component JWT Secret Handler. The manipulation of the argument BETTER_AUTH_SECRET with an unknown input leads to a hard-coded credentials vulnerability. CWE is classifying the issue as CWE-798. The product contains hard-coded credentials, such as a password or cryptographic key, which it uses for its own inbound authentication, outbound communication to external components, or encryption of internal data. This is going to have an impact on confidentiality, integrity, and availability.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-78062. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details and a exploit are known. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 08/22/2026). This vulnerability is assigned to T1110.001 by the MITRE ATT&CK project.

It is declared as proof-of-concept. The project was informed of the problem early through an issue report but has not responded yet.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• vas3k

Name

• TaxHacker

Version

• 0.8.0
• 0.8.1
• 0.8.2

Website

• Product: https://github.com/vas3k/TaxHacker/

CPE 2.3info

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Submitinfo

Accepted

• Submit #881826: vas3k TaxHacker main Use of Weak Credentials (by keyblue)

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