{"id":"UBUNTU-CVE-2026-0994","details":"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.","modified":"2026-04-13T14:18:49.296690Z","published":"2026-01-23T15:16:00Z","related":["USN-8063-1"],"upstream":["CVE-2026-0994"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-0994"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-0994"},{"type":"REPORT","url":"https://github.com/protocolbuffers/protobuf/pull/25239"},{"type":"REPORT","url":"https://github.com/protocolbuffers/protobuf/pull/25586"},{"type":"REPORT","url":"https://github.com/protocolbuffers/protobuf/pull/25587"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8063-1"}],"affected":[{"package":{"name":"protobuf","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/protobuf@3.0.0-9.1ubuntu1.1+esm3?arch=source&distro=esm-infra/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.0-9ubuntu5","3.0.0-9ubuntu6","3.0.0-9.1ubuntu1","3.0.0-9.1ubuntu1.1","3.0.0-9.1ubuntu1.1+esm3"],"ecosystem_specific":{"binaries":[{"binary_version":"3.0.0-9.1ubuntu1.1+esm3","binary_name":"libprotobuf-dev"},{"binary_version":"3.0.0-9.1ubuntu1.1+esm3","binary_name":"libprotobuf-java"},{"binary_version":"3.0.0-9.1ubuntu1.1+esm3","binary_name":"libprotobuf-lite10"},{"binary_version":"3.0.0-9.1ubuntu1.1+esm3","binary_name":"libprotobuf10"},{"binary_version":"3.0.0-9.1ubuntu1.1+esm3","binary_name":"libprotoc-dev"},{"binary_version":"3.0.0-9.1ubuntu1.1+esm3","binary_name":"libprotoc10"},{"binary_version":"3.0.0-9.1ubuntu1.1+esm3","binary_name":"protobuf-compiler"},{"binary_version":"3.0.0-9.1ubuntu1.1+esm3","binary_name":"python-protobuf"},{"binary_version":"3.0.0-9.1ubuntu1.1+esm3","binary_name":"python3-protobuf"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-0994.json"}},{"package":{"name":"protobuf","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/protobuf@3.6.1.3-2ubuntu5.2+esm2?arch=source&distro=esm-infra/focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.6.1.3-2","3.6.1.3-2ubuntu1","3.6.1.3-2ubuntu3","3.6.1.3-2ubuntu4","3.6.1.3-2ubuntu5","3.6.1.3-2ubuntu5.2","3.6.1.3-2ubuntu5.2+esm2"],"ecosystem_specific":{"binaries":[{"binary_version":"3.6.1.3-2ubuntu5.2+esm2","binary_name":"libprotobuf-dev"},{"binary_version":"3.6.1.3-2ubuntu5.2+esm2","binary_name":"libprotobuf-java"},{"binary_version":"3.6.1.3-2ubuntu5.2+esm2","binary_name":"libprotobuf-lite17"},{"binary_version":"3.6.1.3-2ubuntu5.2+esm2","binary_name":"libprotobuf17"},{"binary_version":"3.6.1.3-2ubuntu5.2+esm2","binary_name":"libprotoc-dev"},{"binary_version":"3.6.1.3-2ubuntu5.2+esm2","binary_name":"libprotoc17"},{"binary_version":"3.6.1.3-2ubuntu5.2+esm2","binary_name":"protobuf-compiler"},{"binary_version":"3.6.1.3-2ubuntu5.2+esm2","binary_name":"python-protobuf"},{"binary_version":"3.6.1.3-2ubuntu5.2+esm2","binary_name":"python3-protobuf"},{"binary_version":"3.6.1.3-2ubuntu5.2+esm2","binary_name":"ruby-google-protobuf"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-0994.json"}},{"package":{"name":"protobuf","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/protobuf@3.12.4-1ubuntu7.22.04.6?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.12.4-1ubuntu7.22.04.6"}]}],"versions":["3.12.4-1ubuntu3","3.12.4-1ubuntu5","3.12.4-1ubuntu6","3.12.4-1ubuntu7","3.12.4-1ubuntu7.22.04.1","3.12.4-1ubuntu7.22.04.2","3.12.4-1ubuntu7.22.04.4"],"ecosystem_specific":{"binaries":[{"binary_version":"3.12.4-1ubuntu7.22.04.6","binary_name":"elpa-protobuf-mode"},{"binary_version":"3.12.4-1ubuntu7.22.04.6","binary_name":"libprotobuf-dev"},{"binary_version":"3.12.4-1ubuntu7.22.04.6","binary_name":"libprotobuf-java"},{"binary_version":"3.12.4-1ubuntu7.22.04.6","binary_name":"libprotobuf-lite23"},{"binary_version":"3.12.4-1ubuntu7.22.04.6","binary_name":"libprotobuf23"},{"binary_version":"3.12.4-1ubuntu7.22.04.6","binary_name":"libprotoc-dev"},{"binary_version":"3.12.4-1ubuntu7.22.04.6","binary_name":"libprotoc23"},{"binary_version":"3.12.4-1ubuntu7.22.04.6","binary_name":"protobuf-compiler"},{"binary_version":"3.12.4-1ubuntu7.22.04.6","binary_name":"python3-protobuf"},{"binary_version":"3.12.4-1ubuntu7.22.04.6","binary_name":"ruby-google-protobuf"}],"availability":"No 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