CVE-2025-4565

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

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/protocolbuffers/protobuf/commit/17838beda2943d08b8a9d4df5b68f5f04f26d901	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:google:protobuf-python::::::::
	cpe:2.3:a:google:protobuf-python::::::::
	cpe:2.3:a:google:protobuf-python::::::::

History

14 Aug 2025, 17:05

Type	Values Removed	Values Added
First Time		Google protobuf-python
CPE	cpe:2.3:a:google:protobuf:5.29.5:::::python:: cpe:2.3:a:google:protobuf:6.31.1:::::python:: cpe:2.3:a:google:protobuf:4.25.8:::::python::	cpe:2.3:a:google:protobuf-python::::::::
CVSS	v2 : ~~unknown~~ v3 : ~~7.5~~	v2 : unknown v3 : 5.3

07 Aug 2025, 15:32

Type	Values Removed	Values Added
CPE		cpe:2.3:a:google:protobuf:5.29.5:::::python:: cpe:2.3:a:google:protobuf:6.31.1:::::python:: cpe:2.3:a:google:protobuf:4.25.8:::::python::
References	~~() https://github.com/protocolbuffers/protobuf/commit/17838beda2943d08b8a9d4df5b68f5f04f26d901 -~~	() https://github.com/protocolbuffers/protobuf/commit/17838beda2943d08b8a9d4df5b68f5f04f26d901 - Patch
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5
First Time		Google protobuf Google

17 Jun 2025, 20:50

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-06-16 15:15

Updated : 2025-08-14 17:05

NVD link : CVE-2025-4565

Mitre link : CVE-2025-4565

CVE.ORG link : CVE-2025-4565

JSON object : View

Products Affected

google

protobuf-python

CWE

CWE-674

Uncontrolled Recursion

{"id": "CVE-2025-4565", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 3.9}], "cvssMetricV40": [{"type": "Secondary", "source": "cve-coordination@google.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 8.2, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "HIGH", "valueDensity": "NOT_DEFINED", "vectorString": "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/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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "published": "2025-06-16T15:15:24.990", "references": [{"url": "https://github.com/protocolbuffers/protobuf/commit/17838beda2943d08b8a9d4df5b68f5f04f26d901", "tags": ["Patch"], "source": "cve-coordination@google.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "cve-coordination@google.com", "description": [{"lang": "en", "value": "CWE-674"}]}], "descriptions": [{"lang": "en", "value": "Any project that uses Protobuf Pure-Python backend\u00a0to parse untrusted Protocol Buffers data containing an arbitrary number of recursive groups, recursive messages or a series of SGROUP\u00a0tags 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\u00a017838beda2943d08b8a9d4df5b68f5f04f26d901"}, {"lang": "es", "value": "Cualquier proyecto que utilice el backend Protobuf Pure-Python para analizar datos de Protocol Buffers no confiables que contengan un n\u00famero arbitrario de grupos recursivos, mensajes recursivos o una serie de etiquetas SGROUP puede corromperse al exceder el l\u00edmite de recursi\u00f3n de Python. Esto puede provocar una denegaci\u00f3n de servicio (DSP) que bloquea la aplicaci\u00f3n con un RecursionError. Recomendamos actualizar a la versi\u00f3n 6.31.1 o posterior (commit 17838beda2943d08b8a9d4df5b68f5f04f26d901)."}], "lastModified": "2025-08-14T17:05:37.770", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:google:protobuf-python:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9CE770F3-A719-45B8-83F5-3AAC15F92BAB", "versionEndExcluding": "4.25.8"}, {"criteria": "cpe:2.3:a:google:protobuf-python:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4665132F-1171-4C9B-929C-A17B18C48346", "versionEndExcluding": "5.29.5", "versionStartIncluding": "5.26.0"}, {"criteria": "cpe:2.3:a:google:protobuf-python:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4DE9676C-D5FF-4775-95B6-254BBE420757", "versionEndExcluding": "6.31.1", "versionStartIncluding": "6.30.0"}], "operator": "OR"}]}], "sourceIdentifier": "cve-coordination@google.com"}