CVE-2026-1564: Pega Platform versions 8.1.0 through 25.1.1 are affected by an HTML Injection vulnerability in a user interfac

Routine

MEDIUM 4.8UPGRADE

CVE-2026-1564 is a medium-severity flaw (CVSS 4.8) affecting pega platform. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Pega Platform versions 8.1.0 through 25.1.1 are affected by an HTML Injection vulnerability in a user interface component. Requires a high privileged user with a developer role.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.8 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	Required
EPSS exploit chance	0.2% (top 92%)
CISA exploited list	No
Weakness	CWE-80
Published	2026-04-15
Last modified	2026-10-26

Publisher (CNA): Pegasystems Inc. · Vendor: pega

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

Am I affected?

Timeline

2026-04-15 22:16 UTCPublished CVE record published
2026-10-26 21:10 UTCUpdated Record last modified

pega pega platform UPGRADE

Affected: >= 8.1 and <= 25.1.1

Fixed in: newer than 25.1.1

Safe to downgrade to: a release before 8.1

1. Check installed version

apt-cache policy pega-platform || rpm -q pega-platform || pega-platform --version

2. UPGRADE to newer than 25.1.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade pega-platform

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pega-platform

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 8.1 (Debian / Ubuntu)

apt-cache madison pega-platform sudo apt install pega-platform=<VERSION_BEFORE_8.1> sudo apt-mark hold pega-platform

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

dnf --showduplicates list pega-platform sudo dnf downgrade pega-platform-<VERSION_BEFORE_8.1> sudo dnf versionlock add pega-platform

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-2026-1564?

pega platform: upgrade to newer than 25.1.1. Exact commands for each OS are on this page.

Is CVE-2026-1564 being exploited?

CVE-2026-1564 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-2026-1564 affect?

CVE-2026-1564 affects pega platform. Severity is medium (CVSS 4.8). Pega Platform versions 8.1.0 through 25.1.1 are affected by an HTML Injection vulnerability in a user interface component. Requires a high privileged user with a developer role.

How urgent is CVE-2026-1564?

Priority 19/100. No elevated risk signals yet.

Related CVEs

CVE-2026-1711 MEDIUM 4.8 UPGRADE Pega Platform versions 8.1.0 through 25.1.1 are affected by a Stored Cross-Site Scripting vulnerability in a u
CVE-2026-1562 MEDIUM 4.8 UPGRADE Pega Platform versions 8.1.0 through 25.1.2 are affected by an Stored Cross-site scripting (XSS) vulnerability
CVE-2026-1563 MEDIUM 4.8 UPGRADE Pega Platform versions 8.1.0 through 25.1.2 are affected by an Reflected Cross-site scripting (XSS) vulnerabil

References

← Back to latest CVEs