Vulnerability Description
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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Protobuf | <= 33.4 |
Related Weaknesses (CWE)
References
- https://github.com/protocolbuffers/protobuf/pull/25239PatchVendor 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-2026:8746
- https://access.redhat.com/errata/RHSA-2026:8747
FAQ
What is CVE-2026-0994?
CVE-2026-0994 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 message...
How severe is CVE-2026-0994?
CVE-2026-0994 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-0994?
Check the references section above for vendor advisories and patch information. Affected products include: Google Protobuf.