CVE-2019-3826

Severity: medium (CVSS 6.1 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-03-26 · updated 2026-06-17
Weakness: CWE-79

Description

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.

Affected products

prometheus: before 2.7.1 — fixed in 2.7.1
Red Hat OpenShift Container Platform 4.18: 3.11

How to fix

Upgrade to a fixed version: prometheus 2.7.1. Check the vendor advisory for mitigations.

References

https://access.redhat.com/errata/RHBA-2019:0327
https://advisory.checkmarx.net/advisory/CX-2019-4297
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3826
https://github.com/prometheus/prometheus/commit/62e591f9
https://github.com/prometheus/prometheus/pull/5163
https://lists.apache.org/thread.html/r48d5019bd42e0770f7e5351e420a63a41ff1f16924942442c6aff6a8%40%3Ccommits.zookeeper.apache.org%3E
https://lists.apache.org/thread.html/r8e3f7da12bf5750b0a02e69a78a61073a2ac950eed7451ce70a65177%40%3Ccommits.zookeeper.apache.org%3E
https://lists.apache.org/thread.html/rdf2a0d94c3b5b523aeff7741ae71347415276062811b687f30ea6573%40%3Ccommits.zookeeper.apache.org%3E
https://access.redhat.com/errata/RHBA-2019:0327
https://advisory.checkmarx.net/advisory/CX-2019-4297
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3826
https://github.com/prometheus/prometheus/commit/62e591f9

Get alerted when CVE-2019-3826 or the next vulnerability affects your stack