Debian dla-4834 : keystone - security update

high Nessus Plugin ID 367950

Synopsis

The remote Debian host is missing a security-related update.

Description

The remote Debian 12 host has packages installed that are affected by a vulnerability as referenced in the dla-4834 advisory.

- ------------------------------------------------------------------------- Debian LTS Advisory DLA-4834-1 [email protected] https://www.debian.org/lts/security/ Bastien Roucaris October 13, 2026 https://wiki.debian.org/LTS
- -------------------------------------------------------------------------

Package : keystone Version : 2:22.0.2-0+deb12u5 CVE ID : CVE-2026-90460

A vulnerability was discovered in the handling of delegated authentication in Keystone, the OpenStack identity service, which may result in information disclosure of privilege escalation.

For Debian 12 bookworm, this problem has been fixed in version 2:22.0.2-0+deb12u5.

We recommend that you upgrade your keystone packages.

For the detailed security status of keystone please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/keystone

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian 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

Upgrade the keystone packages.

Plugin Details

Severity: High

ID: 367950

File Name: debian_DLA-4834.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Debian Local Security Checks

Published: 10/20/2026

Updated: 10/20/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.25

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2026-90460

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

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

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

CVSS v4

Risk Factor: High

Base Score: 7.6

Threat Score: 5

Threat Vector: CVSS:4.0/E:U

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

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:12.0, p-cpe:/a:debian:debian_linux:keystone-doc, p-cpe:/a:debian:debian_linux:keystone, p-cpe:/a:debian:debian_linux:python3-keystone

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

Exploit Ease: No known exploits are available

Patch Publication Date: 10/13/2026

Vulnerability Publication Date: 9/11/2026

Reference Information

CVE: CVE-2026-90460

Detections

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