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Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS : OpenStack Aodh and Watcher vulnerability (USN-8870-1)

high Nessus Plugin ID 363110

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-8870-1 advisory.

 Chen YuXiang discovered that OpenStack Aodh did not correctly enforce project scoping in its alarm list API and that the OpenStack Watcher webhook trigger endpoint did not apply authorization. An attacker could possibly use this issue to access sensitive alarm metadata or trigger unauthorized action plans.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://ubuntu.com/security/notices/USN-8870-1

Plugin Details

Severity: High

ID: 363110

File Name: ubuntu_USN-8870-1.nasl

Version: 1.5

Type: Local

Agent: unix

Published: 10/6/2026

Updated: 10/14/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

CVSS v2

Risk Factor: Medium

Base Score: 4

Temporal Score: 3

Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:N/A:N

CVSS Score Source: CVE-2026-76878

CVSS v3

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.8

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 8.4

Threat Score: 5.7

Threat Vector: CVSS:4.0/E:U

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, cpe:/o:canonical:ubuntu_linux:26.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:aodh-api, p-cpe:/a:canonical:ubuntu_linux:aodh-common, p-cpe:/a:canonical:ubuntu_linux:aodh-evaluator, p-cpe:/a:canonical:ubuntu_linux:aodh-expirer, p-cpe:/a:canonical:ubuntu_linux:aodh-listener, p-cpe:/a:canonical:ubuntu_linux:aodh-notifier, p-cpe:/a:canonical:ubuntu_linux:python3-aodh, p-cpe:/a:canonical:ubuntu_linux:python3-watcher, p-cpe:/a:canonical:ubuntu_linux:watcher-api, p-cpe:/a:canonical:ubuntu_linux:watcher-applier, p-cpe:/a:canonical:ubuntu_linux:watcher-common, p-cpe:/a:canonical:ubuntu_linux:watcher-decision-engine

Required KB Items: Host/cpu, Host/Debian/dpkg-l, Host/Ubuntu, Host/Ubuntu/release

Exploit Ease: No known exploits are available

Patch Publication Date: 10/5/2026

Vulnerability Publication Date: 10/5/2026

Reference Information

CVE: CVE-2026-76878

USN: 8870-1