RansomLook up to 2.0.0 Secret Key permission

Summaryinfo

A vulnerability categorized as problematic has been discovered in RansomLook up to 2.0.0. The impacted element is an unknown function of the component Secret Key. Such manipulation leads to permission. This vulnerability is listed as CVE-2026-78553. The attack must be carried out locally. There is no available exploit.

Detailsinfo

A vulnerability was found in RansomLook up to 2.0.0 and classified as problematic. Affected by this issue is an unknown functionality of the component Secret Key. The manipulation with an unknown input leads to a permission vulnerability. Using CWE to declare the problem leads to CWE-275. Impacted is confidentiality, integrity, and availability. CVE summarizes:

RansomLook created its Flask session-signing key without explicitly restricting the file permissions. The secret_key file was created using the process's default permissions and umask, resulting in permissions such as 0644 under a common 022 umask. Consequently, other local users able to access the RansomLook home directory could read the application's cryptographic secret. The exposed key is security-critical because it is used to sign Flask session cookies and is also involved in the legacy API-key key derivation. An attacker who obtains the key can generate valid session cookies and impersonate an authenticated user, including an administrator. In LDAP configurations, exploitation may be particularly straightforward because the session user loader does not require the supplied username to correspond to an existing local user. Successful exploitation requires local access sufficient to read the improperly protected file, but can result in complete compromise of RansomLook's authentication and authorization controls. The patch creates new secret-key files atomically with permissions 0600 and also restricts permissions on existing key files during application startup.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-78553 since 08/24/2026. The exploitation is known to be easy. The attack needs to be approached locally. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1222.

Applying the patch df9d47edcf02dd0125db869d5bc19d93f426d892 is able to eliminate this problem.

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Productinfo

Name

• RansomLook

Version

• 2.0

Website

• Product: https://github.com/RansomLook/RansomLook/

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