# CVE-2026-63401: Coop has cross-org IDOR in addAccessibleQueuesForUser / removeAccessibleQueuesForUser

Status: published. Published: 2026-10-30. Updated: 2026-11-02.

Coop is an open source review and moderation tool from ROOST. Prior to 1.0.2, `addAccessibleQueuesForUser` and `removeAccessibleQueuesForUser` accepted arbitrary `queueId` and `userId` values without organization scoping. An authenticated user belonging to one organization and holding MRT queue-edit permission could grant or revoke another organization's users' access to manual review queues. The existing queue-edit permission check did not bind the supplied identifiers to the caller's organization. The attacker could not read the other organization's queues or jobs, so this issue did not disclose confidential data. This issue is fixed in version 1.0.2.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- roostorg / coop: < 1.0.2 (affected). Source: CNA: GitHub_M

## Severity and prioritization

- CVSS 4.0: 5.3 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N; source: CNA: GitHub_M

- CISA KEV: No listing in collected sources

- EPSS: 0.27% as of 2026-11-02; percentile 19.04%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-639

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/roostorg/coop/security/advisories/GHSA-mf74-gf5j-hxr9 (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/roostorg/coop/pull/872 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/roostorg/coop/commit/bd8fc6cc51de2d8f187ea63a8a7bebb8c4417088 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/roostorg/coop/releases/tag/1.0.2 (CNA: GitHub_M; x_refsource_MISC)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-63401; retrieved 2026-11-02; source updated 2026-11-02

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-63401; retrieved 2026-11-02; source updated Not reported

Revision: 9de26f9785c86d824986c16ce2984612ce55df5c9e68d5bffb22c6b8af1ef65a

Canonical: https://y2.dev/cve/CVE-2026-63401

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