Vulnerability · Published Oct 30, 2026 · Assigned by GitHub_M

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

Medium 5.3

In plain English

A medium-severity authorization bypass via user-controlled key in coop from roostorg. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 19% of all known vulnerabilities).

Severity (CVSS 4.0)5.3Medium

Exploit odds (30 days)0.3%top 80.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
roostorg	coop	< 1.0.2

Weakness: CWE-639 · Vector: 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

References

https://github.com/roostorg/coop/security/advisories/GHSA-mf74-gf5j-hxr9 x_refsource_CONFIRM
https://github.com/roostorg/coop/pull/872 x_refsource_MISC
https://github.com/roostorg/coop/commit/bd8fc6cc51de2d8f187ea63a8a7bebb8c4417088 x_refsource_MISC
https://github.com/roostorg/coop/releases/tag/1.0.2 x_refsource_MISC