CVE-2025-4565

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Source
https://cve.org/CVERecord?id=CVE-2025-4565
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-4565.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-4565
Aliases
Downstream
Related
Published
2025-06-16T14:50:40.906Z
Modified
2026-08-04T03:47:22.195990250Z
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:N CVSS Calculator
Summary
Unbounded recursion in Python Protobuf
Details

Any project that uses Protobuf Pure-Python backend to parse untrusted Protocol Buffers data containing an arbitrary number of recursive groups, recursive messages or a series of SGROUP tags can be corrupted by exceeding the Python recursion limit. This can result in a Denial of service by crashing the application with a RecursionError. We recommend upgrading to version =>6.31.1 or beyond commit 17838beda2943d08b8a9d4df5b68f5f04f26d901

Database specific 
{
    "cna_assigner": "Google",
    "cwe_ids": [
        "CWE-674"
    ],
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "fixed": "4.25.8"
                },
                {
                    "fixed": "5.29.5"
                },
                {
                    "fixed": "6.31.1"
                },
                {
                    "fixed": "4.25.8"
                },
                {
                    "fixed": "5.29.5"
                },
                {
                    "fixed": "6.31.1"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/4xxx/CVE-2025-4565.json"
}
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
Fixed
17838beda2943d08b8a9d4df5b68f5f04f26d901
Database specific 
{
    "source": "REFERENCES"
}

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
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

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-4565.json"