Vulnerability	Vulnerable Version
H Uncontrolled Recursion protobuf is a Google’s data interchange format Affected versions of this package are vulnerable to Uncontrolled Recursion when parsing untrusted Protocol Buffers data containing an excessive number of recursive groups, recursive messages, or a series of SGROUP tags. An attacker can provide crafted input that will corrupt the backend by exceeding the Python recursion limit and result in denial of service by crashing the application with a `RecursionError`. Note: This problem impacts only the pure-Python implementation of the protobuf-python backend and does not influence the CPython PyPi wheels, which, by default, do not utilize pure Python. How to fix Uncontrolled Recursion? Upgrade `protobuf` to version 4.25.8, 5.29.5, 6.31.1 or higher.	[,4.25.8)[5.26.0rc1,5.29.5)[6.30.0rc1,6.31.1)
M Denial of Service (DoS) protobuf is a Google’s data interchange format Affected versions of this package are vulnerable to Denial of Service (DoS) via the `MessageSet` type, by allowing an attacker to send specially crafted message with multiple key-value per elements, therefore creating parsing issues against services which receive unsanitized input. How to fix Denial of Service (DoS)? Upgrade `protobuf` to version 3.18.3, 3.19.5, 3.20.2, 4.21.6 or higher.	[,3.18.3)[3.19.0rc1,3.19.5)[3.20.0rc1,3.20.2)[4.0.0rc1,4.21.6)

Uncontrolled Recursion

protobuf is a Google’s data interchange format

Affected versions of this package are vulnerable to Uncontrolled Recursion when parsing untrusted Protocol Buffers data containing an excessive number of recursive groups, recursive messages, or a series of SGROUP tags. An attacker can provide crafted input that will corrupt the backend by exceeding the Python recursion limit and result in denial of service by crashing the application with a RecursionError.

Note: This problem impacts only the pure-Python implementation of the protobuf-python backend and does not influence the CPython PyPi wheels, which, by default, do not utilize pure Python.

How to fix Uncontrolled Recursion?

Upgrade protobuf to version 4.25.8, 5.29.5, 6.31.1 or higher.

[,4.25.8)[5.26.0rc1,5.29.5)[6.30.0rc1,6.31.1)

Denial of Service (DoS)

protobuf is a Google’s data interchange format

Affected versions of this package are vulnerable to Denial of Service (DoS) via the MessageSet type, by allowing an attacker to send specially crafted message with multiple key-value per elements, therefore creating parsing issues against services which receive unsanitized input.

How to fix Denial of Service (DoS)?

Upgrade protobuf to version 3.18.3, 3.19.5, 3.20.2, 4.21.6 or higher.

[,3.18.3)[3.19.0rc1,3.19.5)[3.20.0rc1,3.20.2)[4.0.0rc1,4.21.6)

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