CVE-2026-76878Network attack vector

Cross-project alarm disclosure via all_projects parsing

Published Aug 19, 2026 · Updated Aug 21, 2026

Authorization bypass in OpenStack Aodh before 20.0.1, 21.0.1, and 22.0.1 lets remote authenticated users read alarms from other projects. In AlarmsController.get_all, the code treats all_projects as privileged only when its parsed boolean value is true; when a caller sends all_projects=false, the admin-only branch is skipped and the request reaches storage without the usual project_id filter. Reader-role access is sufficient, and adding a foreign project_id lets the caller target a specific tenant's alarm metadata, including webhook action URLs, signal endpoints, project IDs, and user IDs.

CVSS severity8.4
High
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in OpenStack Aodh before 20.0.1, 21.0.1, and 22.0.1 lets remote authenticated users read alarms from other projects. In AlarmsController.get_all, the code treats all_projects as privileged only when its parsed boolean value is true; when a caller sends all_projects=false, the admin-only branch is skipped and the request reaches storage without the usual project_id filter. Reader-role access is sufficient, and adding a foreign project_id lets the caller target a specific tenant's alarm metadata, including webhook action URLs, signal endpoints, project IDs, and user IDs.

The record

CVE
CVE-2026-76878
Published
Aug 19, 2026
Updated
Aug 21, 2026
Vendor
OpenStack
Product
Aodh
Classifications
CWE-688
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 21, 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=10.0.0 <20.0.1
  2. Affected versionversion=21.0.0 <21.0.1
  3. Affected versionversion=22.0.0 <22.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OpenStack · Aodhversion=10.0.0 <20.0.1; version=21.0.0 <21.0.1; version=22.0.0 <22.0.1

Published CVSS scores

8.4MITRECVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:L/SI:H/SA:L

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-688Function Call With Incorrect Variable or Reference as Argument

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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