protobuf affected by a JSON recursion depth bypass
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.
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-0994US | high7.5 | Exploit | ||
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.… | ||||
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references
External citations — patches, advisories, analysis.
- https://github.com/protocolbuffers/protobufPACKAGE
- https://github.com/protocolbuffers/protobuf/commit/5ebddcb1bcbe51d1fe323baa145e85f4f23128cfWEB
- https://github.com/protocolbuffers/protobuf/commit/d2b001626d137c62dfee6c88c87324102531868bWEB
- https://github.com/protocolbuffers/protobuf/issues/25070WEB
- https://github.com/protocolbuffers/protobuf/pull/25239WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-0994ADVISORY
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