CVE-2019-3826: A stored, DOM based, cross-site scripting (XSS) flaw was found in Prometheus before version 2.7.1

This month

MEDIUM 6.1WATCHLISTUPGRADEDOWNGRADE

CVE-2019-3826 is a medium-severity flaw (CVSS 6.1) affecting prometheus, openshift container platform. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A stored, DOM based, cross-site scripting (XSS) flaw was found in Prometheus before version 2.7.1. An attacker could exploit this by convincing an authenticated user to visit a crafted URL on a Prometheus server, allowing for the execution and persistent storage of arbitrary scripts.

Why this priority

On your watchlist

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	2.6% (top 15%)
CISA exploited list	No
Weakness	CWE-79
Published	2019-03-26
Last modified	2026-06-17

Publisher (CNA): Red Hat, Inc. · Vendor: prometheus · redhat

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2019-03-26 18:29 UTCPublished CVE record published
2026-06-17 02:35 UTCUpdated Record last modified

prometheus prometheus UPGRADE

Affected: < 2.7.1

Fixed in: 2.7.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy prometheus || rpm -q prometheus || prometheus --version

2. UPGRADE to 2.7.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade prometheus

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade prometheus

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

redhat openshift container platform DOWNGRADE

Affected: 3.11

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.11

1. Check installed version

apt-cache policy openshift-container-platform || rpm -q openshift-container-platform || openshift-container-platform --version

2. No fixed release: DOWNGRADE to a release before 3.11 (Debian / Ubuntu)

apt-cache madison openshift-container-platform sudo apt install openshift-container-platform=<VERSION_BEFORE_3.11> sudo apt-mark hold openshift-container-platform

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list openshift-container-platform sudo dnf downgrade openshift-container-platform-<VERSION_BEFORE_3.11> sudo dnf versionlock add openshift-container-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-2019-3826?

prometheus: upgrade to 2.7.1; openshift container platform: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-3826 being exploited?

CVE-2019-3826 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-2019-3826 affect?

CVE-2019-3826 affects prometheus, openshift container platform. Severity is medium (CVSS 6.1). A stored, DOM based, cross-site scripting (XSS) flaw was found in Prometheus before version 2.7.1. An attacker could exploit this by convincing an authenticated user to visit a crafted URL on a Prometheus server, allowing for the execution

How urgent is CVE-2019-3826?

Priority 48/100. On your watchlist

Software pages

Prometheus vulnerabilities · Red Hat OpenShift vulnerabilities

Related CVEs

CVE-2026-42154 HIGH 7.5 UPGRADE Prometheus is an open-source monitoring system and time series database
CVE-2026-42151 HIGH 7.5 UPGRADE Prometheus is an open-source monitoring system and time series database
CVE-2026-44903 MEDIUM 6.1 UPGRADE Prometheus is an open-source monitoring system and time series database
CVE-2026-40179 MEDIUM 6.1 UPGRADE Prometheus is an open-source monitoring system and time series database
CVE-2021-29622 MEDIUM 6.5 UPGRADE Prometheus is an open-source monitoring system and time series database

References

← Back to latest CVEs