CVE-2025-45768
Description
A flaw was found in pyjwt. The library uses weak encryption, allowing an attacker to potentially decrypt sensitive data. A network-based attacker can exploit this vulnerability without authentication, possibly resulting in a denial of service or data exposure. This weakness stems from the use of inadequate cryptographic algorithms.
Statement
This CVE has been disputed by the PyJWT. The developers of PyJWT confirm that this issue is not a flaw in the library's function but rather a potential risk if an application developer chooses to use weak, short cryptographic keys.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Understanding the Weakness (CWE)
Confidentiality
Technical Impact: Read Application Data
If the application does not use a secure channel, such as SSL, to exchange sensitive information, it is possible for an attacker with access to the network traffic to sniff packets from the connection and uncover the data. This attack is not technically difficult, but does require physical access to some portion of the network over which the sensitive data travels. This access is usually somewhere near where the user is connected to the network (such as a colleague on the company network) but can be anywhere along the path from the user to the end server.
Confidentiality,Integrity
Technical Impact: Modify Application Data
Omitting the use of encryption in any program which transfers data over a network of any kind should be considered on par with delivering the data sent to each user on the local networks of both the sender and receiver. Worse, this omission allows for the injection of data into a stream of communication between two parties -- with no means for the victims to separate valid data from invalid. In this day of widespread network attacks and password collection sniffers, it is an unnecessary risk to omit encryption from the design of any system which might benefit from it.
Frequently Asked Questions
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