CVE-2026-84302

MEDIUMPre-NVD 4.24.2
EchelonGraph scoreLOW confidence

This medium-severity CVE scores 4.2 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). 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: secondary
4.2EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 4.2Exploit: None knownExposed: 0

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

Discourse is an open-source discussion platform. Prior to 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0, Discourse AI reviewables associated with private messages could appear in the moderator review queue of a moderator who was not a participant in the message. Reviewable visibility filtering did not restrict private-message reviewables to the audience permitted to access the underlying private-message topic, allowing the moderator to read otherwise confidential content. Depending on the available reviewable action, the moderator could also modify the private message by closing its topic or deleting a post. Exploitation requires an authenticated moderator account and a pre-existing Discourse AI reviewable associated with a private message. This issue is fixed in versions 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0.

CVSS v3
4.2
EG Score
4.2(low)
EG Risk
19(Track)
EG Risk 19/100SSVC: 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
Severity42% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
—
EPSS %ILE
—
KEV
Not listed

Published

September 24, 2026

Last Modified

September 24, 2026

Advisory Details (6)

Auto-updated Sep 24, 2026
Patch available. Sources: github, github_pr, github_commit.
github_commit

commit b323702d87cd (discourse/discourse)

Fix landed in discourse/discourse commit b323702d87cd — awaiting tagged release

https://github.com/discourse/discourse/commit/b323702d87cd82c327c116d9566477f3c4f9635f
github_commit

commit 38d10c0e5d1b (discourse/discourse)

Fix landed in discourse/discourse commit 38d10c0e5d1b — awaiting tagged release

https://github.com/discourse/discourse/commit/38d10c0e5d1b76540d2860455e0290f8e975c9fd
github_commit

commit 23488b72a200 (discourse/discourse)

Fix landed in discourse/discourse commit 23488b72a200 — awaiting tagged release

https://github.com/discourse/discourse/commit/23488b72a200228e805c4e6d970fbad216d328c5
github_commit

commit 1566d04524c0 (discourse/discourse)

Fix landed in discourse/discourse commit 1566d04524c0 — awaiting tagged release

https://github.com/discourse/discourse/commit/1566d04524c01472375944bbf7b198dd09a99427
github_pr

Security fixes for main

Fix merged in discourse/discourse PR #42091 on 2026-07-28 — awaiting tagged release

https://github.com/discourse/discourse/pull/42091
github Patch Available

Non-participant moderators can read, edit, and delete PM content through Discourse AI reviewables · Advisory · discourse/discourse · GitHub

https://github.com/discourse/discourse/security/advisories/GHSA-3rx9-fqgh-wfpc

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 4× in last 7d / 4× 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. 2026-09-24 18:35 UTCEG score recompute
  2. 2026-09-24 17:18 UTCEG score recompute
  3. 2026-09-24 16:57 UTCEG score recompute
  4. 2026-09-24 16:56 UTCMITRE cvelistV5first tracked

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Frequently asked(4)

What is CVE-2026-84302?
CVE-2026-84302 is a medium vulnerability published on September 24, 2026. Discourse is an open-source discussion platform. Prior to 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0, Discourse AI reviewables associated with private messages could appear in the moderator review queue of a moderator who was not a participant in the message. Reviewable visibility filtering did not…
When was CVE-2026-84302 disclosed?
CVE-2026-84302 was first published in the National Vulnerability Database on September 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-84302?
CVE-2026-84302 has a CVSS v3 base score of 4.2 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-84302?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-84302, 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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