CVE-2026-44903

Prometheus vulnerable to stored XSS via crafted histogram bucket label values in the old web UI heatmap display in github.com/prometheus/prometheus

Description

Prometheus vulnerable to stored XSS via crafted histogram bucket label values in the old web UI heatmap display in github.com/prometheus/prometheus

Patch Available

Fix available through Seal Security. No upgrade required, protect your application instantly.

Fix without upgrading

Score

6.1

Severity

Medium

Ecosystem

GO

Publish Date

June 25, 2026

Modified Date

June 27, 2026

Score Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected Versions