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AlienVault OTX Malware

ruby-jwt v3.0.0.beta1 was discovered to contain weak encryption. NOTE: the Supplier's perspective is "keysize is not something that is enforced by this library. Currently more recent versions of OpenSSL are enforcing some key sizes and those restrictions apply to the users of this gem also."

CVE-2025-45765 is a critical vulnerability identified in the ruby-jwt library version 3.0.0.beta1, which is used for JSON Web Token (JWT) encoding and decoding in Ruby applications. The vulnerability stems from the use of weak encryption key sizes within the library. Although the library itself does not enforce key size restrictions, it relies on underlying cryptographic providers such as OpenSSL, which have started enforcing minimum key size requirements. This weak encryption (classified under CWE-326: Inadequate Encryption Strength) can lead to compromised confidentiality and availability of JWT tokens. Since JWTs are widely used for authentication and authorization in web applications, weak encryption can allow attackers to decrypt tokens, leading to unauthorized access or token forgery. The CVSS v3.1 score of 9.1 (critical) reflects the vulnerability's network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), unchanged scope (S:U), high confidentiality impact (C:H), no integrity impact (I:N), and high availability impact (A:H). The absence of known exploits in the wild suggests it is a newly disclosed issue, but the potential for exploitation is significant given the ease of attack and critical impact. The vulnerability affects applications using the vulnerable ruby-jwt version, especially those that do not enforce strong cryptographic key sizes themselves or rely solely on the library's defaults. This weakness can lead to token decryption or denial of service by exploiting the weak encryption, undermining application security and availability.

Detailed information about CVE-2025-45765: n/a. Get real-time updates, technical details, and mitigation strategies.

CVE-2025-45765: n/a - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2025-45765: n/a

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