Lucene search
+L

CVE-2026-55103

🗓️ 15 Oct 2026 17:05:41Reported by GitHub_MType 
cve
 cve
🔗 web.nvd.nist.gov👁 6 Views

Remote attacker can edit, delete, or reply to federated posts in Discourse ActivityPub.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
circl
Circl
CVE-2026-55103
15 Oct 202617:24
–circl
cvelist
Cvelist
CVE-2026-55103 Discourse ActivityPub: Fix inbound actor validation and apply outbound request SSRF hardening
15 Oct 202617:05
–cvelist
euvd
EUVD
EUVD-2026-102202
15 Oct 202617:05
–euvd
nvd
NVD
CVE-2026-55103
15 Oct 202618:17
–nvd
Vulners
Node
discourseactivityRange<1c8518b0f2abdf31cbea3e0b242f74d8994a9ba5
[
  {
    "vendor": "discourse",
    "product": "discourse-activity-pub",
    "versions": [
      {
        "version": "< 1c8518b0f2abdf31cbea3e0b242f74d8994a9ba5",
        "status": "affected"
      }
    ]
  }
]

Data

Build on a solid foundation with Vulners data

We provide the essential building blocks for cybersecurity solutions with comprehensive, structured, and constantly updated vulnerability and exploits data

Api

Power your application with Vulners API

The Vulners REST API offers reliable, high-performance access to vulnerability intelligence, with 99.9% SLA uptime and CDN-backed data delivery for seamless global access

App

Assess and manage vulnerabilities with Vulners tools

Built on top of Vulners' database and SDK, end-user solutions give security professionals and developers lightweight and powerful tools for vulnerability remediation

15 Oct 2026 18:17Current
6Medium risk
Vulners AI Score6
CVSS 3.18.6
6