What is CVE-2026-82283?

CVE-2026-82283 is a high-severity vulnerability in Voltagent, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.1/10. Published 2026-08-28.

How severe is CVE-2026-82283?

High severity. CVSS v3 base score is 8.1 out of 10.

Auth bypass in Voltagent

CVE-2026-82283

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.

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published 2026-08-28 · last modified 2026-09-23.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.003 (21.2th percentile), scored 2026-10-13.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 21.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001

Affected products

Voltagent

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

github.com/VoltAgent/voltagent/issues/1371 (issue-tracking)
github.com/VoltAgent/voltagent (product)
github.com/VoltAgent/voltagent/blob/44b4c8e4998ce56095b2f0e4eaf1a988f5e6d0de/pa… (technical-description)
www.vulncheck.com/advisories/voltagent-memory-api-handlers-missing-ownership-ch… (third-party-advisory)

Frequently asked questions

What is CVE-2026-82283?: CVE-2026-82283 is a high-severity vulnerability in Voltagent, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.1/10. Published 2026-08-28.
How severe is CVE-2026-82283?: High severity. CVSS v3 base score is 8.1 out of 10.