CVE-2026-45831Public exploitNetwork attack vector

Cross-tenant data access via ignored resource scope

Published Jun 12, 2026 · Updated Jun 12, 2026

Incorrect authorization in ChromaDB 0.5.0 through 1.5.9 allows remote authenticated users to read or modify data across tenants. SimpleRBACAuthorizationProvider.authorize_or_raise checks only whether the user's action set contains the requested action and never reads the supplied tenant, database, or collection resource fields. Exploitation requires SimpleRBAC and a valid action permission; that permission then applies to the same action against resources outside the user's assigned tenant.

CVSS severity8.8
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in ChromaDB 0.5.0 through 1.5.9 allows remote authenticated users to read or modify data across tenants. SimpleRBACAuthorizationProvider.authorize_or_raise checks only whether the user's action set contains the requested action and never reads the supplied tenant, database, or collection resource fields. Exploitation requires SimpleRBAC and a valid action permission; that permission then applies to the same action against resources outside the user's assigned tenant.

The record

CVE
CVE-2026-45831
Published
Jun 12, 2026
Updated
Jun 12, 2026
Vendor
Chroma
Product
ChromaDB
Classifications
CWE-863, T1213, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.5.0 <=*

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Chroma · ChromaDBversion=0.5.0 <=*

Published CVSS scores

8.8NISTCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8HiddenLayerCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1213Data from Information Repositories
T1565.001Stored Data Manipulation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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