CVE-2026-45572

MEDIUMPre-NVD 4.84.8
EchelonGraph scoreLOW confidence

This medium-severity CVE scores 4.8 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: cna:github_m
4.8
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: —CVSS: 4.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Decidim: HTML content blocks allow stored script execution

Description

A privileged admin user who can edit an affected landing page can store arbitrary HTML/JavaScript in an HTML block, and the public page renders it with html_safe and no output escaping.

Technical description

This issue lets any admin who can edit an affected landing page store arbitrary HTML and JavaScript in an HTML block. The block is then rendered back through Decidim::ContentBlocks::HtmlCell#html_content without a sanitization boundary, so the script executes later in visitor's browsers.

Impact

  • A user with landing-page editing rights for an affected scope can persist JavaScript that executes in visitor's browsers on that page.
  • Because exploitation already requires privileged administrative access, the practical risk is lower than a participant-controlled or unauthenticated stored XSS. It still creates a browser-execution primitive in a trusted admin-editable surface.

Patches

See https://github.com/decidim/decidim/pull/16451

Workarounds

Do not give admin permissions to non-trustful users.

Reference

Stored XSS

Credits

This issue was discovered in a security audit organized by the Decidim Association and made by Radically Open Security against Decidim financed by NGI.

CVSS v3
4.8
EG Score
4.8(low)
EPSS
—
KEV
Not listed

Published

July 13, 2026

Last Modified

July 13, 2026

Vendor Advisories for CVE-2026-45572(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Data Freshness Timeline

(refreshed 3× in last 7d / 3× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-15 19:30 UTCEG score recompute
  2. 2026-07-14 18:50 UTCEG score recompute
  3. 2026-07-13 18:08 UTCEG score recompute

Frequently asked(4)

What is CVE-2026-45572?
CVE-2026-45572 is a medium vulnerability published on July 13, 2026. Decidim: HTML content blocks allow stored script execution Description A privileged admin user who can edit an affected landing page can store arbitrary HTML/JavaScript in an HTML block, and the public page renders it with html_safe and no output escaping. Technical description This issue lets any…
When was CVE-2026-45572 disclosed?
CVE-2026-45572 was first published in the National Vulnerability Database on July 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-45572?
CVE-2026-45572 has a CVSS v4.0 base score of 4.8 (CNA self-assessment; NVD's own analysis pending). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-45572?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45572, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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