CVE-2026-110772: Sure 0.7.0 through 0.7.6-alpha.6 Missing Authorization via Transaction Bulk Update

Severity: medium (CVSS 4.3 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: 2026-10-14 · updated 2026-10-15
Weakness: CWE-862

Description

Sure 0.7.0 through 0.7.6-alpha.6 contains a missing authorization vulnerability in Transactions::BulkUpdatesController#create that allows family members to bypass account sharing permissions. Authenticated members with read_only or no share can submit arbitrary entry_ids to modify other members' transaction dates, names, notes, categories, merchants and tags, corrupting budgets and reports.

Affected products

we-promise sure: from 0.7.0 through 0.7.6-alpha.6

References

https://github.com/we-promise/sure
https://github.com/we-promise/sure/blob/a3bb5d991f9b96e335e9212b1a6324289577f143/app/controllers/transactions/bulk_updates_controller.rb#L5-L13
https://github.com/we-promise/sure/issues/2099
https://hackmd.io/@hieuPenguinnn/we-promise-sure-transactions-bulk-update-missing-authz
https://www.vulncheck.com/advisories/sure-0.7.0-through-0.7.6-alpha.6-missing-authorization-via-transaction-bulk-update

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