Most recent entries from all

BIT-prometheus-2026-44903 — Prometheus: Stored XSS via crafted histogram bucket label values in the heatmap display of the old Prometheus web UI

Affected: Bitnami: prometheus

Prometheus is an open-source monitoring system and time series database. From 2.49.0 to before 3.5.3 and 3.11.3, in the Prometheus server's legacy web UI (enabled via the command-line flag --enable-feature=old-ui), the histogram heatmap chart view does not escape le label values when inserting them into the HTML for use as axis tick mark labels. An attacker who can inject crafted metrics can execute JavaScript in the browser of any Prometheus user who views the metric in the heatmap chart UI. This vulnerability is fixed in 3.5.3 and 3.11.3.

Withdrawn: CLEANSTART-2026-AP95632 — Security fixes for CVE-2026-25679, CVE-2026-27139, CVE-2026-27142, CVE-2026-27143, CVE-2026-27144, CVE-2026-32280, CVE-…

Withdrawn by the publisher.

Affected: CleanStart: keda-fips

Multiple security vulnerabilities affect the keda-fips package. These issues are resolved in later releases. See references for individual vulnerability details.

EUVD-2026-321994

fkie_cve-2026-44903

GHSA-fw8g-cg8f-9j28 — Prometheus vulnerable to stored XSS via crafted histogram bucket label values in the old web UI heatmap display

Affected: Go: github.com/prometheus/prometheus

### Impact

In the Prometheus server's legacy web UI (enabled via the command-line flag `--enable-feature=old-ui`), the histogram heatmap chart view does not escape `le` label values when inserting them into the HTML for use as axis tick mark labels.

An attacker who can inject crafted metrics (e.g. via a compromised scrape target, remote write, or OTLP receiver endpoint) can execute JavaScript in the browser of any Prometheus user who views the metric in the heatmap chart UI. From the XSS context, an attacker could for example:

- Read `/api/v1/status/config` to extract sensitive configuration (although credentials / secrets are redacted by the server) - Call `/-/quit` to shut down Prometheus (only if `--web.enable-lifecycle` is set) - Call `/api/v1/admin/tsdb/delete_series` to delete data (only if `--web.enable-admin-api` is set) - Exfiltrate metric data to an external server

Note that this only affects users who have explicitly enabled the legacy Prometheus web UI using the `--enable-feature=old-ui` command-line flag.

### Patches

https://github.com/prometheus/prometheus/commit/38f23b9075ced1de2b82d2dad8b2bebb1ecd5b7d

### Workarounds

If at all possible, disable the legacy web UI by removing the `--enable-feature=old-ui` command-line flag).

If this is not an option, take the following precautions:

- If using the remote write receiver (`--web.enable-remote-write-receiver`), ensure it is not exposed to untrusted sources. - If using the OTLP receiver (`--web.enable-otlp…

UBUNTU-CVE-2026-44903

Affected: Ubuntu:16.04:LTS: prometheus, Ubuntu:18.04:LTS: prometheus, Ubuntu:20.04:LTS: prometheus, Ubuntu:Pro:22.04:LTS: prometheus, Ubuntu:Pro:24.04:LTS: prometheus, Ubuntu:25.10: prometheus, Ubuntu:Pro:26.04:LTS: prometheus

WID-SEC-W-2026-1292 — Prometheus: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Prometheus ausnutzen, um einen Denial of Service Angriff durchzuführen, vertrauliche Informationen offenzulegen oder Cross-Site-Scripting-Angriffe durchzuführen.