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CVE-2026-3157: IBM Sterling B2B Integrator 6.2.0.0 through 6.2.0.5_2, 6.2.1.0 through 6.2.1.1_2, and 6.2.2.0 through 6.2.2.0_

21
Routine
MEDIUM 4.3UPGRADEUPGRADE

CVE-2026-3157 is a medium-severity flaw (CVSS 4.3) affecting sterling b2b integrator, sterling file gateway. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

IBM Sterling B2B Integrator 6.2.0.0 through 6.2.0.5_2, 6.2.1.0 through 6.2.1.1_2, and 6.2.2.0 through 6.2.2.0_1 and IBM Sterling File Gateway 6.2.0.0 through 6.2.0.5_2, 6.2.1.0 through 6.2.1.1_2, and 6.2.2.0 through 6.2.2.0_1 is vulnerable to an information disclosure due to sensitive information being included in the source code comments of a mailbox component.

Why this priority

  • No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score4.3 (Medium)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededLow
User interactionNone
EPSS exploit chance0.3% (top 77%)
CISA exploited listNo
WeaknessCWE-615
Published2026-07-28
Last modified2026-08-03
Publisher (CNA): IBM Corporation · Vendor: ibm

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Last updated 2026-08-03 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

ibm sterling b2b integrator UPGRADE
Affected: >= 6.2.0.0 and <= 6.2.0.5_2 · >= 6.2.1.0 and <= 6.2.1.1_2 · >= 6.2.2.0 and <= 6.2.2.0_1
Fixed in: newer than 6.2.2.0_1
Safe to downgrade to: a release before 6.2.0.0
1. Check installed version
apt-cache policy sterling-b2b-integrator || rpm -q sterling-b2b-integrator || sterling-b2b-integrator --version
2. UPGRADE to newer than 6.2.2.0_1 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade sterling-b2b-integrator
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade sterling-b2b-integrator
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 6.2.0.0 (Debian / Ubuntu)
apt-cache madison sterling-b2b-integrator sudo apt install sterling-b2b-integrator=<VERSION_BEFORE_6.2.0.0> sudo apt-mark hold sterling-b2b-integrator
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list sterling-b2b-integrator sudo dnf downgrade sterling-b2b-integrator-<VERSION_BEFORE_6.2.0.0> sudo dnf versionlock add sterling-b2b-integrator
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.
ibm sterling file gateway UPGRADE
Affected: >= 6.2.0.0 and <= 6.2.0.5_2 · >= 6.2.1.0 and <= 6.2.1.1_2 · >= 6.2.2.0 and <= 6.2.2.0_1
Fixed in: newer than 6.2.2.0_1
Safe to downgrade to: a release before 6.2.0.0
1. Check installed version
apt-cache policy sterling-file-gateway || rpm -q sterling-file-gateway || sterling-file-gateway --version
2. UPGRADE to newer than 6.2.2.0_1 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade sterling-file-gateway
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade sterling-file-gateway
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 6.2.0.0 (Debian / Ubuntu)
apt-cache madison sterling-file-gateway sudo apt install sterling-file-gateway=<VERSION_BEFORE_6.2.0.0> sudo apt-mark hold sterling-file-gateway
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list sterling-file-gateway sudo dnf downgrade sterling-file-gateway-<VERSION_BEFORE_6.2.0.0> sudo dnf versionlock add sterling-file-gateway
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-2026-3157?

sterling b2b integrator: upgrade to newer than 6.2.2.0_1; sterling file gateway: upgrade to newer than 6.2.2.0_1. Exact commands for each OS are on this page.

Is CVE-2026-3157 being exploited?

CVE-2026-3157 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-2026-3157 affect?

CVE-2026-3157 affects sterling b2b integrator, sterling file gateway. Severity is medium (CVSS 4.3). IBM Sterling B2B Integrator 6.2.0.0 through 6.2.0.5_2, 6.2.1.0 through 6.2.1.1_2, and 6.2.2.0 through 6.2.2.0_1 and IBM Sterling File Gateway 6.2.0.0 through 6.2.0.5_2, 6.2.1.0 through 6.2.1.1_2, and 6.2.2.0 through 6.2.2.0_1 is vulnerable

How urgent is CVE-2026-3157?

Priority 21/100. No elevated risk signals yet.

Related CVEs

References

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