CVE-2026-111350: Papermark through 0.22.0 Missing Authorization in Data Room Viewer Group API

Severity: medium (CVSS 5.0 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-15 · updated 2026-10-16
Weakness: CWE-862

Description

Papermark through 0.22.0 contains a missing authorization vulnerability in the data room viewer group API that allows authenticated users to delete other teams' viewer groups and share links. Attackers who know a victim team's data room and group identifiers can send DELETE requests, read group links, or rewrite group document permissions across teams.

Affected products

papermark: through 0.22.0

References

https://github.com/papermark/papermark
https://github.com/papermark/papermark/blob/v0.22.0/pages/api/teams/%5BteamId%5D/datarooms/%5Bid%5D/groups/%5BgroupId%5D/index.ts#L155-L190
https://github.com/papermark/papermark/blob/v0.22.0/pages/api/teams/%5BteamId%5D/datarooms/%5Bid%5D/groups/%5BgroupId%5D/links.ts#L52-L56
https://github.com/papermark/papermark/commit/7fa52b23944823a9e74402fca8e48d644239bc0b
https://github.com/papermark/papermark/commit/b81cf62f390cda112f35538eb09e54b5f728b74a
https://hackmd.io/@hieuPenguinnn/papermark-dataroom-group-delete-missing-authz
https://www.vulncheck.com/advisories/papermark-through-0.22.0-missing-authorization-in-data-room-viewer-group-api

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