CVE-2026-11878: Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in OpenText

Routine

MEDIUM 6.1UPGRADE

CVE-2026-11878 is a medium-severity flaw (CVSS 6.1) affecting access manager. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in OpenText Access Manager allows Cross-Site Scripting (XSS). This issue affects Access Manager: from 5.1 through 5.1.2.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 88%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-06-24
Last modified	2026-10-25

Publisher (CNA): OpenText · Vendor: microfocus

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-24 15:16 UTCPublished CVE record published
2026-10-25 22:10 UTCUpdated Record last modified

microfocus access manager UPGRADE

Affected: >= 5.0 and < 5.1 · 5.1 · 5.1 patch_update_2

Fixed in: 5.1

Safe to downgrade to: a release before 5.0

1. Check installed version

apt-cache policy access-manager || rpm -q access-manager || access-manager --version

2. UPGRADE to 5.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade access-manager

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade access-manager

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 5.0 (Debian / Ubuntu)

apt-cache madison access-manager sudo apt install access-manager=<VERSION_BEFORE_5.0> sudo apt-mark hold access-manager

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

dnf --showduplicates list access-manager sudo dnf downgrade access-manager-<VERSION_BEFORE_5.0> sudo dnf versionlock add access-manager

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-2026-11878?

access manager: upgrade to 5.1. Exact commands for each OS are on this page.

Is CVE-2026-11878 being exploited?

CVE-2026-11878 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-2026-11878 affect?

CVE-2026-11878 affects access manager. Severity is medium (CVSS 6.1). Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in OpenText Access Manager allows Cross-Site Scripting (XSS). This issue affects Access Manager: from 5.1 through 5.1.2.

How urgent is CVE-2026-11878?

Priority 24/100. No elevated risk signals yet.

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References

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