CVE-2026-0994

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Source
https://cve.org/CVERecord?id=CVE-2026-0994
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-0994.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-0994
Aliases
Downstream
Related
Published
2026-01-23T14:55:16.876Z
Modified
2026-06-15T12:23:21.203900957Z
Severity
  • 8.2 (High) CVSS_V4 - 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 CVSS Calculator
Summary
Denial of Service in Python Protobuf
Details

A denial-of-service (DoS) vulnerability exists in google.protobuf.jsonformat.ParseDict() in Python, where the maxrecursion_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.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/0xxx/CVE-2026-0994.json",
    "cna_assigner": "Google",
    "cwe_ids": [
        "CWE-674"
    ]
}
References

Affected packages

Git / github.com/protocolbuffers/protobuf

Affected ranges

Type
GIT
Repo
https://github.com/protocolbuffers/protobuf
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last affected
edaa823d8b36a8656d7b2b9241b7d0bfe50af878
Database specific 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "33.4"
        }
    ],
    "cpe": "cpe:2.3:a:google:protobuf:*:*:*:*:*:*:*:*",
    "source": "CPE_RANGE"
}

Affected versions

rust-prerelease-4.*
rust-prerelease-4.30.0-beta1
rust-prerelease-4.31.0-beta1
v2.*
v2.6.0
v2.6.1rc1
Other
v26-dev
v27-dev
v28-dev
v29-dev
v30-dev
v31-dev
v32-dev
v33-dev
v3.*
v3.0.0-alpha-3
v3.0.0-alpha-4
v3.0.0-beta-1
v3.0.0-beta-1-bzl-fix
v3.0.0-beta-2
v3.0.0-beta-3-pre-1
v3.12.3
v3.20.0-rc2
v33.*
v33.0-rc1
v33.4
v4.*
v4.33.0-rc1-objectivec
v4.33.4-objectivec

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-0994.json"