Bug 2527488 - CVE-2026-84371 prometheus: stored XSS via SVG SMIL URI-list scheme-policy bypass [epel-all]
Summary: CVE-2026-84371 prometheus: stored XSS via SVG SMIL URI-list scheme-policy byp...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora EPEL
Classification: Fedora
Component: prometheus
Version: epel10
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: ---
Assignee: Mikel Olasagasti Uranga
QA Contact:
URL:
Whiteboard: {"flaws": ["689f1508-9b4a-4bdd-8193-c...
Depends On:
Blocks: CVE-2026-84371
TreeView+ depends on / blocked
 
Reported: 2026-09-02 15:00 UTC by Guilherme de Almeida Suckevicz
Modified: 2026-10-04 01:43 UTC (History)
2 users (show)

Fixed In Version: prometheus-3.15.0-1.el10_4 prometheus-3.15.0-1.el10_3 prometheus-3.15.0-1.el10_2 prometheus-3.15.0-1.el9
Clone Of:
Environment:
Last Closed: 2026-10-04 00:30:07 UTC
Type: ---
Embargoed:


Attachments (Terms of Use)

Description Guilherme de Almeida Suckevicz 2026-09-02 15:00:31 UTC
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

ApostropheCMS is an open-source Node.js content management system, and sanitize-html provides a simple HTML sanitizer with a clear API. From version 1.9.0 until version 2.17.7, packages/sanitize-html/index.js validates an animation value attribute as one flat URL and does not recognize that attributeName selecting href or xlink:href gives the sibling values, from, to, or by attribute SVG SMIL URL semantics. In configurations that allow the animate, animateColor, animateMotion, animateTransform, or set elements, a values list can begin with a safe fragment and contain a later executable destination that survives allowedSchemesAppliedToAttributes checking. When the sanitized SVG is rendered, the browser can copy that later destination into the live link, and a victim who activates the link can execute script in the application's origin. This issue is fixed in version 2.17.7.

Comment 1 Fedora Update System 2026-09-25 20:09:57 UTC
FEDORA-EPEL-2026-107b1939e2 (prometheus-3.15.0-1.el10_3) has been submitted as an update to Fedora EPEL 10.3.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-107b1939e2

Comment 2 Fedora Update System 2026-09-25 20:10:13 UTC
FEDORA-EPEL-2026-de6f0d9586 (prometheus-3.15.0-1.el10_4) has been submitted as an update to Fedora EPEL 10.4.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-de6f0d9586

Comment 3 Fedora Update System 2026-09-25 20:10:27 UTC
FEDORA-EPEL-2026-1c3b7b89de (prometheus-3.15.0-1.el9) has been submitted as an update to Fedora EPEL 9.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-1c3b7b89de

Comment 4 Fedora Update System 2026-09-26 02:01:45 UTC
FEDORA-EPEL-2026-1c3b7b89de has been pushed to the Fedora EPEL 9 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-1c3b7b89de

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 5 Fedora Update System 2026-09-26 02:15:20 UTC
FEDORA-EPEL-2026-de6f0d9586 has been pushed to the Fedora EPEL 10.4 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-de6f0d9586

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 6 Fedora Update System 2026-09-26 02:18:13 UTC
FEDORA-EPEL-2026-107b1939e2 has been pushed to the Fedora EPEL 10.3 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-107b1939e2

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 7 Fedora Update System 2026-09-26 02:21:00 UTC
FEDORA-EPEL-2026-9123d16389 has been pushed to the Fedora EPEL 10.2 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-9123d16389

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 8 Fedora Update System 2026-10-04 00:30:07 UTC
FEDORA-EPEL-2026-de6f0d9586 (prometheus-3.15.0-1.el10_4) has been pushed to the Fedora EPEL 10.4 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 9 Fedora Update System 2026-10-04 01:10:37 UTC
FEDORA-EPEL-2026-107b1939e2 (prometheus-3.15.0-1.el10_3) has been pushed to the Fedora EPEL 10.3 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 10 Fedora Update System 2026-10-04 01:25:36 UTC
FEDORA-EPEL-2026-9123d16389 (prometheus-3.15.0-1.el10_2) has been pushed to the Fedora EPEL 10.2 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 11 Fedora Update System 2026-10-04 01:43:58 UTC
FEDORA-EPEL-2026-1c3b7b89de (prometheus-3.15.0-1.el9) has been pushed to the Fedora EPEL 9 stable repository.
If problem still persists, please make note of it in this bug report.


Note You need to log in before you can comment on or make changes to this bug.