CVE-2026-65840

critical

Fider is a feedback portal for feature requests and suggestions.

Fider is a feedback portal for feature requests and suggestions. Prior to version 0.36.0, in multi-tenant mode (HOST_MODE=multi), an attacker can use an email verification key issued by Tenant A to authenticate as the same email address on Tenant B. This completely bypasses tenant isolation and allows unauthorized account takeover across tenants. Single-host deployments (HOST_MODE=single, the default) are NOT affected. This issue has been patched in version 0.36.0.

CVSS

9.6

9.6 (CVSS v3.1)

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

Severity source: NVD CVSS v3.1 (security-advisories@github.com)

Timeline (UTC)

Published: 2026-11-11 19:17

Modified: 2026-11-11 19:17

NVD status: Received

Last synced 50 minutes ago

Verified against the source API 2026-11-11 19:42 UTC

Exploitation

Not listed in CISA KEV (as of last catalog sync)

Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

Not reported by the source (unknown — not "none").

Weakness classification (CWE)

CWE-639

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

No vendor advisory or patch reference tagged by NVD. Check the references below.

References

https://github.com/getfider/fider/releases/tag/v0.36.0 security-advisories@github.com
https://github.com/getfider/fider/security/advisories/GHSA-vxjw-gv4f-vq58 security-advisories@github.com

Data sources

NVD CVE API 2.0 — fetched 2026-11-11 19:42 UTC · record ↗

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