CVE-2026-53606

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 97% 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
5.4
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.4Exploit: NoneExposed: 0

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

ApostropheCMS is an open-source Node.js content management system, and sanitize-html provides a simple HTML sanitizer with a clear API. Versions of sanitize-html prior to 2.17.5 use allowedSchemesAppliedToAttributes (default: ['href', 'src', 'cite']) to gate the naughtyHref() function that blocks dangerous URI schemes like javascript: and vbscript:. The HTML specification defines 10+ attributes that accept URIs (action, formaction, data, poster, background, ping, xlink:href, dynsrc, lowsrc), but none of these are included in the default gate list. When a developer allows any of these attributes in their configuration, javascript: URIs pass through completely unmodified, enabling XSS. Version 2.17.5 patches the issue.

CVSS v3
5.4
EG Score
5.4(medium)
EPSS
3.4%
KEV
Not listed

Published

June 12, 2026

Last Modified

June 15, 2026

Advisory Details (1)

Auto-updated Jun 15, 2026
Patch available. Sources: github.
github Patch Available

Incomplete URI scheme validation in sanitize-html allows javascript: URIs through action, formaction, data, poster, and background attributes · Advisory · apostrophecms/apostrophe · GitHub

https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-vccv-cmxp-4j9h

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 19× in last 7d / 75× 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 16:57 UTCEPSS rescore
  2. 2026-07-15 16:57 UTCEPSS rescore
  3. 2026-07-15 16:14 UTCEG score recompute
  4. 2026-07-15 02:00 UTCEPSS rescore
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  6. 2026-07-14 13:54 UTCEG score recompute
  7. 2026-07-13 22:31 UTCEPSS rescore
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  9. 2026-07-13 06:13 UTCEPSS rescore
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  11. 2026-07-12 17:33 UTCEG score recompute
  12. 2026-07-12 05:46 UTCEPSS rescore
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  16. 2026-07-10 19:44 UTCEG score recompute
  17. 2026-07-09 21:37 UTCEG score recompute
  18. 2026-07-09 19:10 UTCEPSS rescore
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  20. 2026-07-08 21:22 UTCEG score recompute
  21. 2026-07-08 15:16 UTCEPSS rescore
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  24. 2026-07-07 13:46 UTCEPSS rescore
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  1. 2026-07-07 00:58 UTCEG score recompute
  2. 2026-07-06 16:27 UTCEPSS rescore
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 02:23 UTCEPSS rescore
  5. 2026-07-06 02:23 UTCEPSS rescore
  6. 2026-07-05 09:39 UTCEG score recompute
  7. 2026-07-05 02:31 UTCEPSS rescore
  8. 2026-07-05 02:30 UTCEPSS rescore
  9. 2026-07-04 10:33 UTCEG score recompute
  10. 2026-07-04 06:31 UTCEPSS rescore
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  12. 2026-07-03 07:42 UTCEG score recompute
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  14. 2026-07-01 15:07 UTCEPSS rescore
  15. 2026-07-01 11:30 UTCEG score recompute
  16. 2026-06-30 23:22 UTCEPSS rescore
  17. 2026-06-30 13:18 UTCEG score recompute
  18. 2026-06-29 14:06 UTCEPSS rescore
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  20. 2026-06-29 12:45 UTCEG score recompute
  21. 2026-06-28 14:38 UTCEG score recompute
  22. 2026-06-28 14:07 UTCEPSS rescore
  23. 2026-06-28 04:56 UTCEPSS rescore
  24. 2026-06-28 04:56 UTCEPSS rescore
  25. 2026-06-27 16:32 UTCEG score recompute
  26. 2026-06-27 03:08 UTCEPSS rescore
  27. 2026-06-26 18:23 UTCEG score recompute
  28. 2026-06-25 20:16 UTCEG score recompute
  29. 2026-06-25 13:49 UTCEPSS rescore
  30. 2026-06-24 22:10 UTCEG score recompute
  31. 2026-06-24 14:05 UTCEPSS rescore
  32. 2026-06-24 00:03 UTCEG score recompute
  33. 2026-06-23 21:33 UTCEPSS rescore
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  35. 2026-06-23 01:57 UTCEG score recompute
  36. 2026-06-22 14:25 UTCEPSS rescore
  37. 2026-06-22 14:25 UTCEPSS rescore
  38. 2026-06-22 03:50 UTCEG score recompute
  39. 2026-06-21 14:56 UTCEPSS rescore
  40. 2026-06-21 14:56 UTCEPSS rescore
  41. 2026-06-21 05:34 UTCEG score recompute
  42. 2026-06-20 07:27 UTCEG score recompute
  43. 2026-06-19 19:26 UTCEPSS rescore
  44. 2026-06-19 19:26 UTCEPSS rescore
  45. 2026-06-19 09:15 UTCEG score recompute
  46. 2026-06-18 11:02 UTCEG score recompute
  47. 2026-06-17 17:53 UTCEPSS rescore
  48. 2026-06-17 12:51 UTCEG score recompute
  49. 2026-06-16 17:53 UTCEPSS rescore
  50. 2026-06-16 14:42 UTCEG score recompute
  51. 2026-06-15 17:49 UTCEPSS rescore
  52. 2026-06-15 17:49 UTCEPSS rescore
  53. 2026-06-15 16:34 UTCEG score recompute
  54. 2026-06-14 23:18 UTCEPSS rescore
  55. 2026-06-14 18:28 UTCEG score recompute
  56. 2026-06-13 23:00 UTCEPSS rescore
  57. 2026-06-13 20:22 UTCEG score recompute
  58. 2026-06-12 22:14 UTCEG score recompute
  59. 2026-06-12 22:13 UTCNVD updatefirst tracked

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Frequently asked(5)

What is CVE-2026-53606?
CVE-2026-53606 is a medium vulnerability published on June 12, 2026. ApostropheCMS is an open-source Node.js content management system, and sanitize-html provides a simple HTML sanitizer with a clear API. Versions of sanitize-html prior to 2.17.5 use allowedSchemesAppliedToAttributes (default: ['href', 'src', 'cite']) to gate the naughtyHref() function that blocks…
When was CVE-2026-53606 disclosed?
CVE-2026-53606 was first published in the National Vulnerability Database on June 12, 2026, with the most recent update on June 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53606 actively exploited?
CVE-2026-53606 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-53606?
CVE-2026-53606 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-53606?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53606, 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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