CVE-2026-123036: A flaw was found in ansible-core

Routine

MEDIUM 5.5WATCHLISTUPGRADE

CVE-2026-123036 is a medium-severity flaw (CVSS 5.5) affecting ansible-core. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A flaw was found in ansible-core. When a task marked `no_log: true` fails, the task result is censored before being emitted, but the `exception` field is retained because it is present in the PRESERVE allow-list in lib/ansible/_internal/_task.py, and the default stdout callback prints it through CallbackBase._handle_exception. As a result, sensitive values the operator explicitly asked to hide can be disclosed: module argument-validation errors e

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
EPSS exploit chance	n/a
CISA exploited list	No
Weakness	CWE-209
Published	2026-11-05
Last modified	2026-11-05

Publisher (CNA): redhat · Vendor: red hat · Source: CVE Program record (NVD analysis pending)

Last updated 2026-11-05 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-11-05 09:38 UTCPublished CVE record published
2026-11-05 09:38 UTCUpdated Record last modified

red hat ansible-core UPGRADE

Affected: >= 2.19.0 and < 2.23.0

Fixed in: 2.23.0

Safe to downgrade to: a release before 2.19.0

1. Check installed version

apt-cache policy ansible-core || rpm -q ansible-core || ansible-core --version

2. UPGRADE to 2.23.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ansible-core

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ansible-core

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 2.19.0 (Debian / Ubuntu)

apt-cache madison ansible-core sudo apt install ansible-core=<VERSION_BEFORE_2.19.0> sudo apt-mark hold ansible-core

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

dnf --showduplicates list ansible-core sudo dnf downgrade ansible-core-<VERSION_BEFORE_2.19.0> sudo dnf versionlock add ansible-core

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.

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-2026-123036?

ansible-core: upgrade to 2.23.0. Exact commands for each OS are on this page.

Is CVE-2026-123036 being exploited?

CVE-2026-123036 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-2026-123036 affect?

CVE-2026-123036 affects ansible-core. Severity is medium (CVSS 5.5). A flaw was found in ansible-core. When a task marked `no_log: true` fails, the task result is censored before being emitted, but the `exception` field is retained because it is present in the PRESERVE allow-list in lib/ansible/_internal/_ta

How urgent is CVE-2026-123036?

Priority 24/100. On your watchlist

Software pages

Ansible vulnerabilities

References

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