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TI-2026-83443 Aliases CVE-2026-63401

Coop lets users alter other organizations' review queue access

Priority LOW 24CWE-639Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · Low
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-639.

Summary

Coop from roostorg before 1.0.2 accepts arbitrary queue and user identifiers in addAccessibleQueuesForUser and removeAccessibleQueuesForUser without organization scoping. This authorization bypass through a user-controlled key (CWE-639) lets an authenticated user with queue-edit permission in one organization grant or revoke other organizations' users' access to manual review queues. The attacker cannot read the other organization's queues or jobs, so no confidential data is disclosed.

Written with Claude Haiku 5.5 from the sources below · 2026-11-02

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00269 19th percentileScored 2026-11-07
Fix Fixed coop (roostorg): 1.0.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
roostorgcoopbefore 1.0.21.0.2Patch availableCNA
  • coop Vendorroostorg Affected before 1.0.2 Fixed in 1.0.2 Patch available CNA

Remediation

Update Coop to version 1.0.2, which fixes this issue.

Written with Claude Haiku 5.5 from the sources below · 2026-11-02

  • Fix · CNA coop (roostorg) Fixed in 1.0.2

Timeline

  1. 2026-10-30 Threatist record created from CVE-2026-63401
  2. 2026-11-02 CISA SSVC decision points changed

References

Other 4

  • TI-2026-83442 Unauthenticated organization creation in Coop GraphQL API CVSS 4.0MEDIUM 6.9
  • TI-2026-83441 Coop exposes organization and user data through unauthenticated GraphQL query CVSS 4.0HIGH 8.7
  • TI-2026-83445 Coop SAML login flaw allows cross-tenant account takeover CVSS 4.0HIGH 7.4
  • TI-2026-83446 Coop sessions stay valid after password reset CVSS 4.0LOW 2.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences