Is CVE-2026-45831 in the CISA KEV catalog?

No. CVE-2026-45831 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-45831?

CVE-2026-45831 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2026-45831?

CVE-2026-45831 has an EPSS score of 0.24% (14th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2026-45831

HIGH

8.8

CVSS v3

NVD

Description

The SimpleRBACAuthorizationProvider authorization provider in versions 0.5.0 or later of the ChromaDB Python project evaluates whether a user holds a given permission but never checks which tenant, database, or collection that permission applies to allowing users to perform cross tenant actions.

CWE-863

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

0.24%probability of exploitation in 30 days

14thpercentile

Low risk: more likely to be exploited than 14% of all known CVEs.

References

https://www.hiddenlayer.com/sai-security-advisory/2026-06-chromadb-3

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-16.