CVE-2026-57530

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

Score 5.4 from GitHub Security Advisory published 2026-07-24. a secondary CVSS source baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.4Exploit: None knownExposed: 0

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

Milkdown before 7.21.3 contains a stored cross-site scripting vulnerability in the @milkdown/preset-commonmark and @milkdown/components packages that allows attackers with document write access to execute arbitrary JavaScript in the browser context of any user who opens the document or clicks a rendered link. The parseMarkdown runner stores raw URL values from the remark AST as href mark attributes without URL scheme validation, and the ineffective DOMPurify.sanitize call in edit-view.ts treats the bare URL string as a text node and returns it unchanged, allowing javascript: payloads to pass through the link-tooltip preview component and read-only mode anchor elements unmodified.

CVSS v3
5.4
EG Score
5.4(medium)
EG Risk
24(Track)
EG Risk 24/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity54% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
7%
KEV
Not listed

Published

July 24, 2026

Last Modified

July 27, 2026

Advisory Details (4)

Auto-updated Jul 25, 2026
Patch available. Sources: github_release, github_pr, github_commit.
generic

Milkdown < 7.21.3 Stored XSS via javascript: URL in link href | Advisories | VulnCheck

https://www.vulncheck.com/advisories/milkdown-stored-xss-via-javascript-url-in-link-href
github_commit Patch Available

commit db1ae721854a (Milkdown/milkdown)

Patch available: Milkdown/milkdown v7.21.3 (contains commit db1ae721854a)

https://github.com/Milkdown/milkdown/commit/db1ae721854a0ab2f188b83cf8695702966640f1
github_pr Patch Available

fix: sanitize unsafe link hrefs and emoji html to prevent stored XSS

Patch available: Milkdown/milkdown v7.21.3 (PR #2410 merged 2026-07-12)

https://github.com/Milkdown/milkdown/pull/2410
github_release Patch Available

v7.21.3

Patch available: Milkdown/milkdown v7.21.3

https://github.com/Milkdown/milkdown/releases/tag/v7.21.3

Vendor Advisories for CVE-2026-57530(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 15× 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. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-30 00:16 UTCEG score recompute
  3. 2026-08-30 00:16 UTCGHSA enrichment
  4. 2026-08-28 21:42 UTCEPSS rescore
  5. 2026-08-27 21:06 UTCEG score recompute
  6. 2026-08-27 21:06 UTCGHSA enrichment
  7. 2026-08-27 14:25 UTCEPSS rescore
  8. 2026-08-26 19:52 UTCEG score recompute
  9. 2026-08-26 19:52 UTCGHSA enrichment
  10. 2026-08-26 14:46 UTCEPSS rescore
  11. 2026-08-25 18:16 UTCGHSA enrichment
  12. 2026-08-24 18:28 UTCEG score recompute
  13. 2026-08-24 18:28 UTCGHSA enrichment
  14. 2026-08-23 18:48 UTCEG score recompute
  15. 2026-08-23 18:48 UTCGHSA enrichment
  16. 2026-08-23 00:19 UTCEPSS rescore
  17. 2026-08-22 19:11 UTCEG score recompute
  18. 2026-08-22 19:11 UTCGHSA enrichment
  19. 2026-08-21 23:49 UTCEPSS rescore
  20. 2026-08-21 19:34 UTCEG score recompute
  21. 2026-08-21 19:34 UTCGHSA enrichment
  22. 2026-08-20 22:55 UTCEPSS rescore
  23. 2026-08-20 19:56 UTCGHSA enrichment
  24. 2026-08-19 20:17 UTCEG score recompute
  25. 2026-08-19 20:17 UTCGHSA enrichment
Show 72 more
  1. 2026-08-19 17:04 UTCEPSS rescore
  2. 2026-08-18 18:52 UTCEG score recompute
  3. 2026-08-18 18:52 UTCGHSA enrichment
  4. 2026-08-18 13:48 UTCEPSS rescore
  5. 2026-08-17 14:06 UTCEG score recompute
  6. 2026-08-17 14:06 UTCGHSA enrichment
  7. 2026-08-17 13:47 UTCEPSS rescore
  8. 2026-08-16 14:56 UTCEPSS rescore
  9. 2026-08-16 14:29 UTCEG score recompute
  10. 2026-08-16 14:29 UTCGHSA enrichment
  11. 2026-08-16 02:14 UTCEPSS rescore
  12. 2026-08-15 14:52 UTCEG score recompute
  13. 2026-08-15 14:52 UTCGHSA enrichment
  14. 2026-08-15 01:30 UTCEPSS rescore
  15. 2026-08-14 15:15 UTCEG score recompute
  16. 2026-08-14 15:15 UTCGHSA enrichment
  17. 2026-08-13 22:00 UTCEPSS rescore
  18. 2026-08-13 15:37 UTCGHSA enrichment
  19. 2026-08-12 15:55 UTCEG score recompute
  20. 2026-08-12 15:55 UTCGHSA enrichment
  21. 2026-08-12 13:51 UTCEPSS rescore
  22. 2026-08-11 16:18 UTCEG score recompute
  23. 2026-08-11 16:18 UTCGHSA enrichment
  24. 2026-08-11 00:00 UTCEPSS rescore
  25. 2026-08-10 16:40 UTCGHSA enrichment
  26. 2026-08-09 16:45 UTCEG score recompute
  27. 2026-08-09 16:45 UTCGHSA enrichment
  28. 2026-08-09 13:46 UTCEPSS rescore
  29. 2026-08-08 17:08 UTCEG score recompute
  30. 2026-08-08 17:08 UTCGHSA enrichment
  31. 2026-08-08 16:37 UTCEPSS rescore
  32. 2026-08-07 17:30 UTCEG score recompute
  33. 2026-08-07 17:30 UTCGHSA enrichment
  34. 2026-08-06 17:53 UTCEG score recompute
  35. 2026-08-06 17:53 UTCGHSA enrichment
  36. 2026-08-06 13:47 UTCEPSS rescore
  37. 2026-08-05 19:17 UTCEPSS rescore
  38. 2026-08-05 18:16 UTCGHSA enrichment
  39. 2026-08-04 18:38 UTCEG score recompute
  40. 2026-08-04 18:38 UTCGHSA enrichment
  41. 2026-08-04 15:10 UTCEPSS rescore
  42. 2026-08-04 10:39 UTCEPSS rescore
  43. 2026-08-03 19:00 UTCEG score recompute
  44. 2026-08-03 19:00 UTCGHSA enrichment
  45. 2026-08-03 10:36 UTCEPSS rescore
  46. 2026-08-02 19:23 UTCEG score recompute
  47. 2026-08-02 19:23 UTCGHSA enrichment
  48. 2026-08-02 02:27 UTCEPSS rescore
  49. 2026-08-01 19:46 UTCGHSA enrichment
  50. 2026-07-31 20:08 UTCGHSA enrichment
  51. 2026-07-30 20:31 UTCEG score recompute
  52. 2026-07-30 20:31 UTCGHSA enrichment
  53. 2026-07-30 16:28 UTCEPSS rescore
  54. 2026-07-30 01:30 UTCEPSS rescore
  55. 2026-07-30 01:30 UTCEPSS rescore
  56. 2026-07-29 20:06 UTCGHSA enrichment
  57. 2026-07-28 20:22 UTCEG score recompute
  58. 2026-07-28 20:21 UTCGHSA enrichment
  59. 2026-07-28 15:37 UTCEPSS rescore
  60. 2026-07-27 20:43 UTCEG score recompute
  61. 2026-07-27 20:43 UTCGHSA enrichment
  62. 2026-07-27 14:14 UTCEPSS rescore
  63. 2026-07-27 02:34 UTCEG score recompute
  64. 2026-07-27 02:34 UTCGHSA enrichment
  65. 2026-07-26 14:54 UTCEPSS rescore
  66. 2026-07-26 14:54 UTCEPSS rescore
  67. 2026-07-26 02:56 UTCEG score recompute
  68. 2026-07-26 02:55 UTCGHSA enrichment
  69. 2026-07-25 14:18 UTCEPSS rescore
  70. 2026-07-25 14:18 UTCEPSS rescore
  71. 2026-07-24 19:42 UTCEG score recompute
  72. 2026-07-24 19:42 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-57530?
CVE-2026-57530 is a medium vulnerability published on July 24, 2026. Milkdown before 7.21.3 contains a stored cross-site scripting vulnerability in the @milkdown/preset-commonmark and @milkdown/components packages that allows attackers with document write access to execute arbitrary JavaScript in the browser context of any user who opens the document or clicks a…
When was CVE-2026-57530 disclosed?
CVE-2026-57530 was first published in the National Vulnerability Database on July 24, 2026, with the most recent update on July 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-57530 actively exploited?
CVE-2026-57530 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 92.6% of all scored CVEs.
What is the CVSS score of CVE-2026-57530?
CVE-2026-57530 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-57530?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-57530, 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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