Vulnerability · Published Apr 3, 2026 · Assigned by GitHub_M

CVE-2026-34947Discourse: Staged user custom fields are exposed on public invite pages

Low 2.7

In plain English

A low-severity information exposure in discourse from discourse. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities).

Severity (CVSS 4.0)2.7Low

Exploit odds (30 days)0.2%top 87.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, staged user custom fields and username are exposed on public invite pages without email verification. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.

Affected products (as reported)

Vendor	Product	Versions
discourse	discourse	>= 2026.1.0-latest, < 2026.1.3>= 2026.2.0-latest, < 2026.2.2>= 2026.3.0-latest, < 2026.3.0

Weakness: CWE-200 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U

References

https://github.com/discourse/discourse/security/advisories/GHSA-4rcw-wq9x-54qw x_refsource_CONFIRM