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.
- Score
- CVSS 4.0 8.2 High
- Status
- Modified - cve-coordination@google.com
- Published
- 2026-01-23
- Last modified
- 2026-09-01
- Weaknesses
- CWE-674
Affected products
- Protobuf (Google)
- Protobuf (Python)
- Ai Inference Server (Redhat)
- Amq Clients (Redhat)
- Ansible Automation Platform (Redhat)
- Enterprise Linux (Redhat)
- Enterprise Linux Eus (Redhat)
- Hummingbird (Redhat)
- Openstack (Redhat)
- Rhel E4s (Redhat)
- Rhel Eus (Redhat)
References
- https://github.com/protocolbuffers/protobuf/pull/25239
- 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
