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CVE-2026-55839 Kestra: Stored XSS via custom Markdown [[link]] attribute injection

🗓️ 18 Aug 2026 15:27:18Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 6 Views

Kestra before 1.3.24 allows stored XSS via [[link]] attribute injection in Flow descriptions.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
attackerkb
ATTACKERKB
CVE-2026-55839
18 Aug 202615:27
attackerkb
cve
CVE
CVE-2026-55839
18 Aug 202615:27
cve
euvd
EUVD
EUVD-2026-60976
18 Aug 202615:27
euvd
github
Github Security Blog
Kestra vulnerable to stored XSS via custom Markdown [[link]] attribute injection
18 Aug 202616:31
github
nvd
NVD
CVE-2026-55839
18 Aug 202616:17
nvd
osv
OSV
GHSA-34PM-923J-7WF8 Kestra vulnerable to stored XSS via custom Markdown [[link]] attribute injection
18 Aug 202616:31
osv
ptsecurity
Positive Technologies
PT-2026-77151
18 Aug 202600:00
ptsecurity
[
  {
    "vendor": "kestra-io",
    "product": "kestra",
    "versions": [
      {
        "version": "< 1.3.24",
        "status": "affected"
      }
    ]
  }
]

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