Auth bypass in Chroma-Core Chroma
CVE-2026-92782
Chroma through 1.5.9 fails to validate tenant and database segments when resolving collections, allowing authenticated attackers to access collections from other tenants by knowing the collection identifier. Attackers can read, modify, and update records in foreign collections by issuing requests under their own tenant path, bypassing authorization checks.
Vulnerability class: Broken Access Control
Published · last modified .
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: 0.004 (38.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 38.9% 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
Weakness classification (CWE)
References
- github.com/chroma-core/chroma/issues/7462 (issue-tracking)
- github.com/chroma-core/chroma (product)
- github.com/chroma-core/chroma/blob/1.5.9/rust/frontend/src/server.rs (technical-description)
- github.com/chroma-core/chroma/blob/1.5.9/rust/frontend/src/get_collection_with_… (technical-description)
- www.vulncheck.com/advisories/chroma-through-1.5.9-authorization-bypass-via-coll… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-92782?
- CVE-2026-92782 is a high-severity vulnerability in Chroma-Core Chroma, classified under Incorrect Authorization. CVSS score: 8.1/10. Published 2026-09-16.
- How severe is CVE-2026-92782?
- High severity. CVSS v3 base score is 8.1 out of 10.