EUVD-2026-67814
GHSA-ch6f-pcf5-xp4j
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/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
Low-privilege authentication required; no scope change; high C and I from arbitrary cross-user conversation read/write; no availability impact.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
2DescriptionCVE.org
VoltAgent through 2.1.20 fails to validate conversation ownership in memory API handlers, allowing authenticated users to access other users' conversations. Attackers can read, modify, and delete arbitrary conversations and messages by supplying caller-controlled identifiers to memory endpoints.
AnalysisAI
Insecure Direct Object Reference in VoltAgent through 2.1.20 allows any authenticated user to read, modify, or delete conversations belonging to other users by supplying arbitrary conversation identifiers to memory API endpoints. The server accepts caller-controlled identifiers without verifying ownership, enabling horizontal privilege escalation across all users of a shared deployment. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must possess a valid authenticated session on the target VoltAgent instance, corresponding to PR:L in the CVSS 4.0 vector. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 8.6 (AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N) accurately reflects the real-world risk profile: the attack is network-accessible, requires no special conditions, demands only a low-privilege authenticated account, and yields high confidentiality and integrity impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Server-side ownership validation must be added to all memory API handlers to verify that the authenticated session user owns the conversation identifier before processing read, write, or delete operations. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Audit API access logs for unauthorized conversation access patterns, quantify affected users and data volume, and notify stakeholders and legal of breach exposure. …
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Same technique Authentication Bypass
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External POC / Exploit Code
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