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protobuf vulnerabilities

Vulnerabilities published for protobuf in the last 30 days: 0. Listed in the KEV catalogue: 0.

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Vulnerabilities: 2

  1. CVE-2026-6409

    High · CVSS 7.1EPSS 0.36%No fix published

    Denial of Service (DoS) vulnerability exists in the Protobuf PHP library during the parsing of untrusted input

    A Denial of Service (DoS) vulnerability exists in the Protobuf PHP library during the parsing of untrusted input. Maliciously structured messages—specifically those containing negative varints or deep recursion—can be used to crash the application, impacting service availability.

    Published Updated
  2. CVE-2026-0994

    High · CVSS 8.2EPSS 0.71%Fix available

    Denial of Service in Python Protobuf

    A denial-of-service (DoS) vulnerability exists in google.protobuf.json_format.ParseDict() in Python, where the max_recursion_depth limit can be bypassed when parsing nested google.protobuf.Any messages. Due to missing recursion depth accounting inside the internal Any-handling logic, an attacker can supply deeply nested Any structures that bypass the intended recursion limit, eventually exhausting Python’s recursion stack and causing a RecursionError.

    • Update to 3.21.12-11ubuntu3.1
    Published Updated

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