CVE-2026-44787

EUVD-2026-42735
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
8.2 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 19%
Affected Products (NVD)
VendorProductVersion
discoursediscourse
2026.1.0 ≤
𝑥
< 2026.1.5
discoursediscourse
2026.4.0 ≤
𝑥
< 2026.4.2
discoursediscourse
2026.5.0 ≤
𝑥
< 2026.5.1
discoursediscourse
2026.6.0
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://github.com/discourse/discourse/commit/012796ac28c85b30aa233c5ef042fc66efff8126
https://github.com/discourse/discourse/commit/0f50a07a6ef4b33f3f826ce6d7bf6d7bd16912d8
https://github.com/discourse/discourse/commit/5418e3027dba109e27a4796463686d61e190ac29
https://github.com/discourse/discourse/commit/6fc7e6cf04422fc3f9d1c99134803071e983ff0a
https://github.com/discourse/discourse/releases/tag/v2026.1.5
https://github.com/discourse/discourse/releases/tag/v2026.4.2
https://github.com/discourse/discourse/releases/tag/v2026.5.1
https://github.com/discourse/discourse/releases/tag/v2026.6.0
https://github.com/discourse/discourse/security/advisories/GHSA-vmwq-jvxx-jwfx