CVE-2026-55596

HIGHPre-NVD 8.78.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 85% of all CVEs by exploit prediction. 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: epss, secondary
Elevated
8.7
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.7Exploit: NoneExposed: 0

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

Plate is a rich-text editor with AI and shadcn/ui. From 53.0.0 until 53.1.4, the media embed renderer trusts serialized provider or sourceUrl metadata in useMediaState and skips parseMediaUrl protocol validation, allowing a crafted Plate document to set a known video provider while keeping url as a javascript: iframe source that the registry MediaEmbedElement renders directly as an iframe src when a victim opens the document. This issue is fixed in version 53.1.4.

CVSS v3
8.7
EG Score
8.7(medium)
EPSS
15.2%
KEV
Not listed

Published

July 8, 2026

Last Modified

July 10, 2026

Advisory Details (4)

Auto-updated Jul 8, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github_release, github, github_pr.
github_release Patch Available

v53.1.4

Patch available: udecode/plate v53.1.4

https://github.com/udecode/plate/releases/tag/v53.1.4
github_commit Patch Available

commit 6214914ca811 (udecode/plate)

Patch available: udecode/plate v53.1.4 (contains commit 6214914ca811)

https://github.com/udecode/plate/commit/6214914ca811adf22d0ad503154494216eed68ba
github_pr Patch Available

Fix media embed URL sanitization

Patch available: udecode/plate v53.1.4 (PR #5014 merged 2026-06-14)

https://github.com/udecode/plate/pull/5014
github Patch Available🟡 PoC Available

Media embed provider metadata can bypass URL sanitization and execute iframe JavaScript · Advisory · udecode/plate · GitHub

https://github.com/udecode/plate/security/advisories/GHSA-qj6x-xx2h-8hvv

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 27× in last 7d / 29× 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 23:55 UTCEG score recompute
  2. 2026-07-15 16:57 UTCEPSS rescore
  3. 2026-07-15 16:57 UTCEPSS rescore
  4. 2026-07-15 12:31 UTCEG score recompute
  5. 2026-07-15 02:00 UTCEPSS rescore
  6. 2026-07-15 02:00 UTCEPSS rescore
  7. 2026-07-15 01:05 UTCEG score recompute
  8. 2026-07-14 13:41 UTCEG score recompute
  9. 2026-07-14 02:17 UTCEG score recompute
  10. 2026-07-13 22:31 UTCEPSS rescore
  11. 2026-07-13 14:53 UTCEG score recompute
  12. 2026-07-13 06:13 UTCEPSS rescore
  13. 2026-07-13 06:13 UTCEPSS rescore
  14. 2026-07-13 03:29 UTCEG score recompute
  15. 2026-07-12 16:04 UTCEG score recompute
  16. 2026-07-12 05:46 UTCEPSS rescore
  17. 2026-07-12 04:40 UTCEG score recompute
  18. 2026-07-11 17:16 UTCEG score recompute
  19. 2026-07-11 08:27 UTCEPSS rescore
  20. 2026-07-11 08:27 UTCEPSS rescore
  21. 2026-07-11 05:51 UTCEG score recompute
  22. 2026-07-10 18:26 UTCEG score recompute
  23. 2026-07-10 07:01 UTCEG score recompute
  24. 2026-07-09 19:34 UTCEG score recompute
  25. 2026-07-09 19:10 UTCEPSS rescore
Show 4 more
  1. 2026-07-09 19:10 UTCEPSS rescore
  2. 2026-07-09 08:09 UTCEG score recompute
  3. 2026-07-08 20:44 UTCEG score recompute
  4. 2026-07-08 20:44 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-55596?
CVE-2026-55596 is a high vulnerability published on July 8, 2026. Plate is a rich-text editor with AI and shadcn/ui. From 53.0.0 until 53.1.4, the media embed renderer trusts serialized provider or sourceUrl metadata in useMediaState and skips parseMediaUrl protocol validation, allowing a crafted Plate document to set a known video provider while keeping url as a…
When was CVE-2026-55596 disclosed?
CVE-2026-55596 was first published in the National Vulnerability Database on July 8, 2026, with the most recent update on July 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55596 actively exploited?
CVE-2026-55596 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 15.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-55596?
CVE-2026-55596 has a CVSS v3 base score of 8.7 (NVD).
How do I remediate CVE-2026-55596?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-55596, 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.

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