CVE-2026-115642: In OpenStack keystonemiddleware before 13.0.2, by supplying a custom X-Service-Token header in a request, anyo

Routine

HIGH 8.3UPGRADE

CVE-2026-115642 is a high-severity flaw (CVSS 8.3) affecting keystonemiddleware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In OpenStack keystonemiddleware before 13.0.2, by supplying a custom X-Service-Token header in a request, anyone in possession of an access-restricted application credential may bypass those restrictions resulting in elevation of privileges.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.3 (High)
EPSS exploit chance	n/a
CISA exploited list	No
Weakness	CWE-863
Published	2026-10-30
Last modified	2026-10-30

Publisher (CNA): mitre · Vendor: openstack · Source: CVE Program record (NVD analysis pending)

Last updated 2026-10-30 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-30 16:23 UTCPublished CVE record published
2026-10-30 16:23 UTCUpdated Record last modified

openstack keystonemiddleware UPGRADE

Affected: < 10.12.2 · >= 11.0.0 and < 12.0.1 · >= 13.0.0 and < 13.0.2

Fixed in: 10.12.2, 12.0.1, 13.0.2

Safe to downgrade to: a release before 11.0.0

1. Check installed version

apt-cache policy keystonemiddleware || rpm -q keystonemiddleware || keystonemiddleware --version

2. UPGRADE to 10.12.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade keystonemiddleware

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade keystonemiddleware

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 11.0.0 (Debian / Ubuntu)

apt-cache madison keystonemiddleware sudo apt install keystonemiddleware=<VERSION_BEFORE_11.0.0> sudo apt-mark hold keystonemiddleware

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list keystonemiddleware sudo dnf downgrade keystonemiddleware-<VERSION_BEFORE_11.0.0> sudo dnf versionlock add keystonemiddleware

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Advisories and coverage

Research and news

VulDB Recent Entries: CVE-2026-115642 | OpenStack keystonemiddleware up to 10.12.1/12.0.0/13.0.1 X-Service-Token privileges management 2026-10-30

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-115642?

keystonemiddleware: upgrade to 10.12.2, 12.0.1, 13.0.2. Exact commands for each OS are on this page.

Is CVE-2026-115642 being exploited?

CVE-2026-115642 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-115642 affect?

CVE-2026-115642 affects keystonemiddleware. Severity is high (CVSS 8.3). In OpenStack keystonemiddleware before 13.0.2, by supplying a custom X-Service-Token header in a request, anyone in possession of an access-restricted application credential may bypass those restrictions resulting in elevation of privileges

How urgent is CVE-2026-115642?

Priority 29/100. High severity

Software pages

OpenStack vulnerabilities

References

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