CVE-2026-4096: IBM DevOps Plan 3.0.0 through 3.0.6 is vulnerable to HTTP header injection, caused by improper validation of i

Routine

MEDIUM 6.5REMOTEUPGRADE

CVE-2026-4096 is a medium-severity flaw (CVSS 6.5) affecting devops plan. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

IBM DevOps Plan 3.0.0 through 3.0.6 is vulnerable to HTTP header injection, caused by improper validation of input by the HOST headers. This could allow an attacker to conduct various attacks against the vulnerable system, including cross-site scripting, cache poisoning or session hijacking

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.1% (top 96%)
CISA exploited list	No
Weakness	CWE-644
Published	2026-06-11
Last modified	2026-10-26

Publisher (CNA): IBM Corporation · Vendor: hcltech

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-11 16:16 UTCPublished CVE record published
2026-10-26 11:10 UTCUpdated Record last modified

hcltech devops plan UPGRADE

Affected: >= 3.0.0 and < 3.0.7

Fixed in: 3.0.7

Safe to downgrade to: a release before 3.0.0

1. Check installed version

apt-cache policy devops-plan || rpm -q devops-plan || devops-plan --version

2. UPGRADE to 3.0.7 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade devops-plan

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade devops-plan

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 3.0.0 (Debian / Ubuntu)

apt-cache madison devops-plan sudo apt install devops-plan=<VERSION_BEFORE_3.0.0> sudo apt-mark hold devops-plan

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

dnf --showduplicates list devops-plan sudo dnf downgrade devops-plan-<VERSION_BEFORE_3.0.0> sudo dnf versionlock add devops-plan

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-2026-4096?

devops plan: upgrade to 3.0.7. Exact commands for each OS are on this page.

Is CVE-2026-4096 being exploited?

CVE-2026-4096 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-2026-4096 affect?

CVE-2026-4096 affects devops plan. Severity is medium (CVSS 6.5). IBM DevOps Plan 3.0.0 through 3.0.6 is vulnerable to HTTP header injection, caused by improper validation of input by the HOST headers. This could allow an attacker to conduct various attacks against the vulnerable system, including cross-s

How urgent is CVE-2026-4096?

Priority 29/100. Remotely exploitable, no login, no user action

References

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