What’s Vulnerable › Vulnerabilities

CVE-2026-62247: Supabase Realtime: Incorrect Authorization

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-21 · updated 2026-09-24
• Weakness: CWE-863

Description

Supabase Realtime provides Broadcast, Presence, and Postgres Changes via WebSockets. Prior to 2.111.2, Realtime authorization does not correctly honor the per-extension presence.read row-level security policy when a private-channel client is allowed presence.write but explicitly denied presence.read. Under that differential policy, the client can receive presence_diff messages containing other members' presence metadata, including application-defined location, online-status, roster, viewing, or typing information. Deployments with uniform presence visibility have no differential, and postgres_changes row data is unaffected. This issue is fixed in version 2.111.2.

Affected products

• supabase realtime: before 2.111.2

References

• https://github.com/supabase/realtime/commit/c039bca9b57c2e554a67fdf462970b54641d82eb
• https://github.com/supabase/realtime/pull/1969
• https://github.com/supabase/realtime/releases/tag/v2.111.2
• https://github.com/supabase/realtime/security/advisories/GHSA-rcr8-2525-4r7p

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