CVE-2026-0994

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/protocolbuffers/protobuf/pull/25239	Patch Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:16174
https://access.redhat.com/errata/RHSA-2026:3059
https://access.redhat.com/errata/RHSA-2026:3094
https://access.redhat.com/errata/RHSA-2026:3095
https://access.redhat.com/errata/RHSA-2026:3097
https://access.redhat.com/errata/RHSA-2026:3218
https://access.redhat.com/errata/RHSA-2026:3219
https://access.redhat.com/errata/RHSA-2026:3220
https://access.redhat.com/errata/RHSA-2026:3461
https://access.redhat.com/errata/RHSA-2026:3462
https://access.redhat.com/errata/RHSA-2026:3958
https://access.redhat.com/errata/RHSA-2026:3959
https://access.redhat.com/errata/RHSA-2026:61627
https://access.redhat.com/errata/RHSA-2026:61629
https://access.redhat.com/errata/RHSA-2026:8746
https://access.redhat.com/errata/RHSA-2026:8747
https://access.redhat.com/errata/RHSA-2026:8748
https://access.redhat.com/security/cve/CVE-2026-0994
https://bugzilla.redhat.com/show_bug.cgi?id=2432398
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-0994.json

Configurations

Configuration 1 (hide)

cpe:2.3:a:google:protobuf:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-01-23 15:16

Updated : 2026-09-01 13:18

NVD link : CVE-2026-0994

Mitre link : CVE-2026-0994

CVE.ORG link : CVE-2026-0994

JSON object : View

Products Affected

google

protobuf

CWE

CWE-674

Uncontrolled Recursion

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"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-0994.json", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "cve-coordination@google.com", "description": [{"lang": "en", "value": "CWE-674"}]}, {"type": "Secondary", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "description": [{"lang": "en", "value": "CWE-674"}]}], "descriptions": [{"lang": "en", "value": "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.\n\nDue 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\u2019s recursion stack and causing a RecursionError."}, {"lang": "es", "value": "Hay una vulnerabilidad de denegaci\u00f3n de servicio (DoS) en google.protobuf.json_format.ParseDict() en Python, donde el l\u00edmite max_recursion_depth puede ser evitado al analizar mensajes anidados de google.protobuf.Any.\n\nDebido a que no se contabiliza la profundidad de recursi\u00f3n dentro de la l\u00f3gica interna de manejo de Any, un atacante puede proporcionar estructuras Any profundamente anidadas que evitan el l\u00edmite de recursi\u00f3n previsto, agotando finalmente la pila de recursi\u00f3n de Python y causando un RecursionError."}], "lastModified": "2026-09-01T13:18:07.523", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:google:protobuf:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CF0F8C1C-5CDF-4758-864F-FFF2CBF7B00C", "versionEndIncluding": "33.4"}], "operator": "OR"}]}], "sourceIdentifier": "cve-coordination@google.com"}