VulnSocial

CVE-2026-30889Disclosure(discourse / discourse)

LOWCVSS 4.9 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, a moderator could exploit insufficient authorization checks to access metadata of posts they should not have permission to view. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch.

discourse CVEsBack to dashboard
0.0/ 10 priority

Sources & remediation

Vendor / third-party advisories
Weakness type (CWE)
CWE-862

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • discourse

Threat summary

  • 3 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Technical details provided in 3 signals
  • Disclosure: 2 classified signals
  • General: 1 classified signal
  • Peaked 1d ago at 2 mentions (2026-03-20); latest day: 1
  • 3 total mentions across 2 days

Affected systems

Vendors
discourse
Products
discourse

1 version affected across 1 product

Deep dive

Activity timeline3 mentions / 2d
01122Mentions · 2026-03-20: 2Mentions · 2026-05-13: 1Technical Details · 2026-03-20: 2Technical Details · 2026-05-13: 103-2005-13
Signal classification2 categories
Disclosure
266.7%
General
133.3%
Referenced assets2 URLs
Classification over time
DateTotalLabels
2026-03-202
Disclosure2
2026-05-131
General1
Full discourse3 posts
  • Lyrie.ai@lyrie_ai
    General

    Two CVEs (CVE-2026-30889 and CVE-2026-31200) were classic JSON-RPC parser bugs in popular MCP client SDKs. One allowed a server response to set arbitrary properties on the client's session-state object via prototype pollution. The other allowed a server to inject batched…

    Post summary

    The post reports two JSON‑RPC parser bugs (CVE‑2026‑30889 and CVE‑2026‑31200) that enable servers to manipulate client session state via prototype pollution and batched injections, but provides no evidence of exploitation, patch, or PoC.

    1000033
    210 followersView on X
  • Vulmon Vulnerability Feed@VulmonFeeds
    Disclosure

    CVE-2026-30889 Insufficient Authorization Check in Discourse Allows Moderator Access to Restricted Post Metadata https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-30889

    Post summary

    The text announces a new authorization-bypass vulnerability in Discourse, providing a brief technical description but lacking proof or exploitation details.

    0000043
    4.0K followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-30889 Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, a moderator could exploit insufficient authorization che… https://www.cve.org/CVERecord?id=CVE-2026-30889

    Post summary

    The post announces an authorization bypass vulnerability in older Discourse versions, noting that moderators could exploit it, but offers no PoC, exploit code, patch, or evidence of active exploitation.

    0000045
    56.8K followersView on X
CPE platform detail2 entries

2 of 2 entries

PartVendorProductVersionTarget SWTarget HW
Appdiscoursediscourse---
Appdiscoursediscourse2026.3.0--

Explore more

Back to dashboarddiscourse CVEsdiscourse vulnerabilities