CVE-2026-75159: An unauthenticated client that can reach a MongoDB Connector for BI deployment configured with Kerberos authen

Routine

MEDIUM 5.9REMOTEUPGRADE

CVE-2026-75159 is a medium-severity flaw (CVSS 5.9) affecting bi connector. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An unauthenticated client that can reach a MongoDB Connector for BI deployment configured with Kerberos authentication may cause mongosqld to terminate when a crafted authentication exchange encounters a specific GSSAPI error-handling condition. This can interrupt BI Connector availability until the process restarts.

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.9 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 59%)
CISA exploited list	No
Weakness	CWE-415
Published	2026-08-27
Last modified	2026-09-23

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

Last updated 2026-09-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-27 17:19 UTCPublished CVE record published
2026-09-23 16:33 UTCUpdated Record last modified

mongodb bi connector UPGRADE

Affected: >= 2.4.0 and < 2.14.30

Fixed in: 2.14.30

Safe to downgrade to: a release before 2.4.0

1. Check installed version

apt-cache policy bi-connector || rpm -q bi-connector || bi-connector --version

2. UPGRADE to 2.14.30 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade bi-connector

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade bi-connector

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 2.4.0 (Debian / Ubuntu)

apt-cache madison bi-connector sudo apt install bi-connector=<VERSION_BEFORE_2.4.0> sudo apt-mark hold bi-connector

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

dnf --showduplicates list bi-connector sudo dnf downgrade bi-connector-<VERSION_BEFORE_2.4.0> sudo dnf versionlock add bi-connector

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-2026-75159?

bi connector: upgrade to 2.14.30. Exact commands for each OS are on this page.

Is CVE-2026-75159 being exploited?

CVE-2026-75159 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-2026-75159 affect?

CVE-2026-75159 affects bi connector. Severity is medium (CVSS 5.9). An unauthenticated client that can reach a MongoDB Connector for BI deployment configured with Kerberos authentication may cause mongosqld to terminate when a crafted authentication exchange encounters a specific GSSAPI error-handling condi

How urgent is CVE-2026-75159?

Priority 36/100. Remotely exploitable, no login, no user action

Software pages

MongoDB vulnerabilities

Related CVEs

CVE-2026-75573 MEDIUM 4.4 UPGRADE In MongoDB Connector for BI, mongodrdl may write a TLS private-key password to standard error when the passwor

References

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