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Description

Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, the signup flow could allow newly registered users to set primary_group_id and gain whisper-group privileges without legitimate group membership on sites with whispers_allowed_groups configured. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.

PUBLISHED Reserved 2026-05-07 | Published 2026-07-09 | Updated 2026-07-10 | Assigner GitHub_M




HIGH: 8.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

Problem types

CWE-269: Improper Privilege Management

Product status

>= 2026.1.0-latest, < 2026.1.5
affected

>= 2026.4.0-latest, < 2026.4.2
affected

>= 2026.5.0-latest, < 2026.5.1
affected

References

github.com/...course/security/advisories/GHSA-vmwq-jvxx-jwfx

github.com/...ommit/012796ac28c85b30aa233c5ef042fc66efff8126

github.com/...ommit/0f50a07a6ef4b33f3f826ce6d7bf6d7bd16912d8

github.com/...ommit/5418e3027dba109e27a4796463686d61e190ac29

github.com/...ommit/6fc7e6cf04422fc3f9d1c99134803071e983ff0a

github.com/discourse/discourse/releases/tag/v2026.1.5

github.com/discourse/discourse/releases/tag/v2026.4.2

github.com/discourse/discourse/releases/tag/v2026.5.1

github.com/discourse/discourse/releases/tag/v2026.6.0

cve.org (CVE-2026-44787)

nvd.nist.gov (CVE-2026-44787)

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