An issue was discovered in OpenStack Keystone before 29.0.3. Tokens obtained via delegated authentication methods (EC2 credentials, application credentials, OAuth1 access tokens, and trusts) are not blocked from creating, modifying, or deleting credentials via the /v3/credentials API. EC2-derived tokens can additionally read credential blobs, exposing TOTP MFA seeds and other secrets. Also, PATCH /v3/credentials does not validate the requested post-update project_id, allowing any delegated token to move a credential to an unauthorized project. All Keystone deployments using delegated authentication are affected.

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                debian-lts@lists.debian.org     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.

The remote Debian 13 host has packages installed that are affected by a vulnerability as referenced in the dsa-6554 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6554-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     October 12, 2026                      https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : keystone     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 the stable distribution (trixie), this problem has been fixed in     version 2:27.0.0-3+deb13u6.

    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 Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

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.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - An issue was discovered in OpenStack Keystone before 29.0.3. Tokens obtained via delegated authentication     methods (EC2 credentials, application credentials, OAuth1 access tokens, and trusts) are not blocked from     creating, modifying, or deleting credentials via the /v3/credentials API. EC2-derived tokens can     additionally read credential blobs, exposing TOTP MFA seeds and other secrets. Also, PATCH /v3/credentials     does not validate the requested post-update project_id, allowing any delegated token to move a credential     to an unauthorized project. All Keystone deployments using delegated authentication are affected.
    (CVE-2026-90460)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
367950	Debian dla-4834 : keystone - security update	Nessus	Debian Local Security Checks	Local	high
365111	Debian dsa-6554 : keystone - security update	Nessus	Debian Local Security Checks	Local	high
345186	Linux Distros Unpatched Vulnerability : CVE-2026-90460	Nessus	Misc.	Local	high

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CVE-2026-90460

high

Tenable Plugins

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high

high