CVE-2026-0994

HIGH EPSS 27.0%
Published Jan 23, 20265mo ago · Modified Jun 17, 20261w ago
8.2 CVSS 4.0
High
Find Similar
Published Jan 23, 2026 5mo ago
Last Modified Jun 17, 2026 1w ago

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 Details

Base Score
8.2
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
27.0% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-674

Affected Products 1

VendorProductVersionRange
googleprotobuf* ≤33.4

References 1

  • github.com https://github.com/protocolbuffers/protobuf/pull/25239
    PatchVendor Advisory

Remediation

  • github.com https://github.com/protocolbuffers/protobuf/pull/25239
    PatchVendor Advisory