CVE-2026-45780

MEDIUMNVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.3 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 68% of all CVEs by exploit prediction. 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: epss, nvd
4.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.3Exploit: NoneExposed: 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 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, EventSerializer could expose invited group names, sample invitees, and attendance statistics to users who could view the topic but were not entitled to view the private event invitee list. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.

CVSS v3
4.3
EG Score
4.3(medium)
EPSS
28.6%
KEV
Not listed

Published

July 9, 2026

Last Modified

July 14, 2026

Advisory Details (5)

Auto-updated Jul 9, 2026
Patch available. Sources: github_commit, github.
github Patch Available

Private event sample invitees are serialized to non-invited event viewers · Advisory · discourse/discourse · GitHub

https://github.com/discourse/discourse/security/advisories/GHSA-22v7-6wgj-g9f7
github_commit

commit 7deb4b696344 (discourse/discourse)

Fix landed in discourse/discourse commit 7deb4b696344 — awaiting tagged release

https://github.com/discourse/discourse/commit/7deb4b6963442569357b41e61febe37594e5e730
github_commit

commit 6457ab71f36a (discourse/discourse)

Fix landed in discourse/discourse commit 6457ab71f36a — awaiting tagged release

https://github.com/discourse/discourse/commit/6457ab71f36a2d1440fe96af0a2593897844b023
github_commit

commit 4d46638041b5 (discourse/discourse)

Fix landed in discourse/discourse commit 4d46638041b5 — awaiting tagged release

https://github.com/discourse/discourse/commit/4d46638041b5f3d1e1f7f6f6f19c1df3bd65a586
github_commit

commit 37969503f203 (discourse/discourse)

Fix landed in discourse/discourse commit 37969503f203 — awaiting tagged release

https://github.com/discourse/discourse/commit/37969503f20369eb1712b7b88daedcfb4f63f5f1

Weakness Classification(1)

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-45780?
CVE-2026-45780 is a medium vulnerability published on July 9, 2026. Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, EventSerializer could expose invited group names, sample invitees, and attendance statistics to users who could view the topic but were not entitled to view the private event invitee list. This…
When was CVE-2026-45780 disclosed?
CVE-2026-45780 was first published in the National Vulnerability Database on July 9, 2026, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-45780 actively exploited?
CVE-2026-45780 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 28.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-45780?
CVE-2026-45780 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-45780?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45780, 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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