CVE-2026-12139: Tanium addressed an information disclosure vulnerability in Connect.

Routine

MEDIUM 4.4UPGRADE

CVE-2026-12139 is a medium-severity flaw (CVSS 4.4) affecting connect. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Tanium addressed an information disclosure vulnerability in Connect.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.4 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.2% (top 96%)
CISA exploited list	No
Weakness	CWE-214
Published	2026-07-21
Last modified	2026-10-24

Publisher (CNA): Tanium · Vendor: tanium

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-21 21:16 UTCPublished CVE record published
2026-10-24 19:10 UTCUpdated Record last modified

tanium connect UPGRADE

Affected: >= 5.29.0 and < 5.29.251 · >= 5.37.0 and < 5.37.156 · >= 5.47.0 and < 5.47.112

Fixed in: 5.29.251, 5.37.156, 5.47.112

Safe to downgrade to: a release before 5.29.0

1. Check installed version

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

2. UPGRADE to 5.29.251 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade connect

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 5.29.0 (Debian / Ubuntu)

apt-cache madison connect sudo apt install connect=<VERSION_BEFORE_5.29.0> sudo apt-mark hold connect

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

dnf --showduplicates list connect sudo dnf downgrade connect-<VERSION_BEFORE_5.29.0> sudo dnf versionlock add connect

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-2026-12139?

connect: upgrade to 5.29.251, 5.37.156, 5.47.112. Exact commands for each OS are on this page.

Is CVE-2026-12139 being exploited?

CVE-2026-12139 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-2026-12139 affect?

CVE-2026-12139 affects connect. Severity is medium (CVSS 4.4). Tanium addressed an information disclosure vulnerability in Connect.

How urgent is CVE-2026-12139?

Priority 16/100. No elevated risk signals yet.

References

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