CVSS 4.0
8.2 highCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:LCVE-2026-0994
High (8.2) in google protobuf. EPSS 0.7% chance of exploitation in the next 30 days. Fixed in protobuf 5.29.6, 6.33.5.
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.
Severity
CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- EPSS
- 0.7% chance of exploitation in the next 30 days; higher than 53% of CVEs (scores of 2026-10-31)
- CWE
- CWE-674
- Published
- Modified
- Record from
- the NVD, synced
Affected
- google:protobuf
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-7gcm-g887-7qv7 | PyPI | protobuf | >=6.30.0rc1 <6.33.5 | 6.33.5 |
| GHSA-7gcm-g887-7qv7 | PyPI | protobuf | <5.29.6 | 5.29.6 |
| PYSEC-2026-1805 | PyPI | protobuf | <5.29.6 >=6.30.0rc1 <6.33.5 | 5.29.6, 6.33.5 |