CVE-2026-84967: A component of the MongoDB extension for Visual Studio Code does not neutralize special characters in a connec

Routine

MEDIUM 4.3UPGRADE

CVE-2026-84967 is a medium-severity flaw (CVSS 4.3) affecting mongodb. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A component of the MongoDB extension for Visual Studio Code does not neutralize special characters in a connection string before that value is placed into a command line the extension composes for an integrated terminal. An unauthenticated remote unauthorized-user who persuades a developer to accept a user-supplied connection target, and then to open the extension's shell feature, can place characters of the unauthorized-user’s choosing into that

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 81%)
CISA exploited list	No
Weakness	CWE-78
Published	2026-09-03
Last modified	2026-09-09

Publisher (CNA): MongoDB, Inc. · Vendor: mongodb

Last updated 2026-09-09 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-03 16:18 UTCPublished CVE record published
2026-09-09 19:51 UTCUpdated Record last modified

mongodb mongodb UPGRADE

Affected: >= 1.13.0 and < 1.17.1

Fixed in: 1.17.1

Safe to downgrade to: a release before 1.13.0

1. Check installed version

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

2. UPGRADE to 1.17.1 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade mongodb

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 1.13.0 (Debian / Ubuntu)

apt-cache madison mongodb sudo apt install mongodb=<VERSION_BEFORE_1.13.0> sudo apt-mark hold mongodb

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

dnf --showduplicates list mongodb sudo dnf downgrade mongodb-<VERSION_BEFORE_1.13.0> sudo dnf versionlock add mongodb

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-2026-84967?

mongodb: upgrade to 1.17.1. Exact commands for each OS are on this page.

Is CVE-2026-84967 being exploited?

CVE-2026-84967 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-2026-84967 affect?

CVE-2026-84967 affects mongodb. Severity is medium (CVSS 4.3). A component of the MongoDB extension for Visual Studio Code does not neutralize special characters in a connection string before that value is placed into a command line the extension composes for an integrated terminal. An unauthenticated

How urgent is CVE-2026-84967?

Priority 20/100. No elevated risk signals yet.

Software pages

MongoDB vulnerabilities · Visual Studio vulnerabilities

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References

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