CVE-2026-42573

MEDIUMNVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.1 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 76% 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, nvd
6.1
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.1Exploit: NoneExposed: 0

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

Svelte is a performance oriented web framework. Prior to version 5.55.7, Svelte was vulnerable to DOM clobbering of its internal framework state on elements, potentially leading to XSS attacks. This issue has been patched in version 5.55.7.

CVSS v3
6.1
EG Score
6.1(medium)
EPSS
23.9%
KEV
Not listed

Published

June 9, 2026

Last Modified

June 30, 2026

Advisory Details (2)

Auto-updated Jun 13, 2026
Patch available. Sources: github, github_release.
github Patch Available

XSS via DOM Clobbering of Internal Framework State · Advisory · sveltejs/svelte · GitHub

https://github.com/sveltejs/svelte/security/advisories/GHSA-rcqx-6q8c-2c42
github_release Patch Available

[email protected]

Patch available: sveltejs/svelte [email protected]

https://github.com/sveltejs/svelte/releases/tag/svelte%405.55.7

Vendor Advisories for CVE-2026-42573(1)

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

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
svelte—5.55.7—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 64× 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. 2026-07-12 05:46 UTCEPSS rescore
  2. 2026-07-12 02:49 UTCEG score recompute
  3. 2026-07-11 08:27 UTCEPSS rescore
  4. 2026-07-11 03:54 UTCEG score recompute
  5. 2026-07-09 23:53 UTCEG score recompute
  6. 2026-07-09 19:10 UTCEPSS rescore
  7. 2026-07-08 22:02 UTCEG score recompute
  8. 2026-07-08 15:15 UTCEPSS rescore
  9. 2026-07-07 23:06 UTCEG score recompute
  10. 2026-07-07 13:46 UTCEPSS rescore
  11. 2026-07-06 16:27 UTCEPSS rescore
  12. 2026-07-06 16:27 UTCEPSS rescore
  13. 2026-07-06 02:23 UTCEPSS rescore
  14. 2026-07-06 02:23 UTCEPSS rescore
  15. 2026-07-05 15:11 UTCEG score recompute
  16. 2026-07-05 02:30 UTCEPSS rescore
  17. 2026-07-04 15:52 UTCEG score recompute
  18. 2026-07-04 06:31 UTCEPSS rescore
  19. 2026-07-03 16:58 UTCEG score recompute
  20. 2026-07-02 18:05 UTCEG score recompute
  21. 2026-07-01 18:47 UTCEG score recompute
  22. 2026-07-01 15:06 UTCEPSS rescore
  23. 2026-06-30 23:22 UTCEPSS rescore
  24. 2026-06-30 19:53 UTCEG score recompute
  25. 2026-06-29 20:59 UTCEG score recompute
Show 47 more
  1. 2026-06-29 14:06 UTCEPSS rescore
  2. 2026-06-28 22:05 UTCEG score recompute
  3. 2026-06-28 14:07 UTCEPSS rescore
  4. 2026-06-28 04:56 UTCEPSS rescore
  5. 2026-06-27 23:11 UTCEG score recompute
  6. 2026-06-27 03:08 UTCEPSS rescore
  7. 2026-06-27 00:09 UTCEG score recompute
  8. 2026-06-26 01:15 UTCEG score recompute
  9. 2026-06-25 13:49 UTCEPSS rescore
  10. 2026-06-25 13:49 UTCEPSS rescore
  11. 2026-06-25 02:11 UTCEG score recompute
  12. 2026-06-24 14:05 UTCEPSS rescore
  13. 2026-06-24 03:17 UTCEG score recompute
  14. 2026-06-23 21:33 UTCEPSS rescore
  15. 2026-06-23 04:09 UTCEG score recompute
  16. 2026-06-22 14:25 UTCEPSS rescore
  17. 2026-06-22 14:25 UTCEPSS rescore
  18. 2026-06-22 04:52 UTCEG score recompute
  19. 2026-06-21 14:56 UTCEPSS rescore
  20. 2026-06-21 14:56 UTCEPSS rescore
  21. 2026-06-21 05:06 UTCEG score recompute
  22. 2026-06-21 01:59 UTCEPSS rescore
  23. 2026-06-20 06:12 UTCEG score recompute
  24. 2026-06-19 19:25 UTCEPSS rescore
  25. 2026-06-19 06:32 UTCEG score recompute
  26. 2026-06-18 17:52 UTCEPSS rescore
  27. 2026-06-18 17:52 UTCEPSS rescore
  28. 2026-06-18 07:37 UTCEG score recompute
  29. 2026-06-17 17:53 UTCEPSS rescore
  30. 2026-06-17 08:44 UTCEG score recompute
  31. 2026-06-16 17:52 UTCEPSS rescore
  32. 2026-06-16 09:42 UTCEG score recompute
  33. 2026-06-15 17:49 UTCEPSS rescore
  34. 2026-06-15 10:47 UTCEG score recompute
  35. 2026-06-14 11:48 UTCEG score recompute
  36. 2026-06-13 23:00 UTCEPSS rescore
  37. 2026-06-13 12:55 UTCEG score recompute
  38. 2026-06-12 23:12 UTCEPSS rescore
  39. 2026-06-12 23:12 UTCEPSS rescore
  40. 2026-06-12 13:59 UTCEG score recompute▲ 0.80
  41. 2026-06-11 19:56 UTCNVD updateCVSS v3 → 6.1
  42. 2026-06-11 15:05 UTCEG score recompute
  43. 2026-06-11 14:00 UTCEPSS rescore
  44. 2026-06-10 22:18 UTCEPSS rescore
  45. 2026-06-10 16:11 UTCEG score recompute
  46. 2026-06-09 17:17 UTCEG score recompute
  47. 2026-06-09 17:17 UTCNVD updatefirst tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-42573?
CVE-2026-42573 is a medium vulnerability published on June 9, 2026. Svelte is a performance oriented web framework. Prior to version 5.55.7, Svelte was vulnerable to DOM clobbering of its internal framework state on elements, potentially leading to XSS attacks. This issue has been patched in version 5.55.7.
When was CVE-2026-42573 disclosed?
CVE-2026-42573 was first published in the National Vulnerability Database on June 9, 2026, with the most recent update on June 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42573 actively exploited?
CVE-2026-42573 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 23.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-42573?
CVE-2026-42573 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2026-42573?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42573, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-42573

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