Auth bypass in Obot-Platform Obot
CVE-2026-105139
Obot 0.26.0 before 0.26.2 contains an authorization bypass vulnerability that allows authenticated users matching any vMCP profile to reach prompts and resources of ungranted components. Because profiles were enforced only on tools, attackers can access prompts, resources, and resource templates through the vMCP owner's shared component connection.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/obot-platform/obot/commit/8d92701c2018a7b9dd6d692498fa5f41fdb912ea (patch)
- github.com/obot-platform/obot (product)
- github.com/obot-platform/obot/security/advisories/GHSA-xhpw-65qw-wj6m (vendor-advisory)
- github.com/obot-platform/obot/releases/tag/v0.26.2 (release-notes)
- github.com/obot-platform/obot/blob/8cfac5d38baa4fa0719e7975b7542608ff8bc932/pkg… (technical-description)
- github.com/obot-platform/obot/blob/8cfac5d38baa4fa0719e7975b7542608ff8bc932/pkg… (technical-description)
- www.vulncheck.com/advisories/obot-0.26.0-before-0.26.2-authorization-bypass-via… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-105139?
- CVE-2026-105139 is a medium-severity vulnerability in Obot-Platform Obot, classified under Incorrect Authorization. CVSS score: 4.3/10. Published 2026-10-07.
- How severe is CVE-2026-105139?
- Medium severity. CVSS v3 base score is 4.3 out of 10.