Auth bypass in Signoz
CVE-2026-57956
SigNoz before 0.133.0 contains a broken access control vulnerability that allows authenticated users to access other organizations' alert rules by supplying a target rule UUID, as the alert rule store predicates fail to filter by organization ID. Attackers can read, edit, and delete alert rules belonging to other organizations by exploiting the missing tenant isolation check, bypassing multi-tenant access controls.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:L.
EPSS exploit prediction
EPSS: 0.004 (26.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 26.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Signoz — versions 0
Weakness classification (CWE)
References
- github.com/SigNoz/signoz/issues/11830 (issue-tracking)
- www.vulncheck.com/advisories/signoz-cross-organization-insecure-direct-object-r… (third-party-advisory)
- github.com/SigNoz/signoz/pull/12117 (issue-tracking)
- github.com/SigNoz/signoz/releases/tag/v0.133.0 (release-notes)
Frequently asked questions
- What is CVE-2026-57956?
- CVE-2026-57956 is a medium-severity vulnerability in Signoz, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.4/10. Published 2026-06-29.
- How severe is CVE-2026-57956?
- Medium severity. CVSS v3 base score is 6.4 out of 10.