CVE-2026-107856 CiviForm: Trusted-Intermediary IDOR discloses any citizen's name and email
An authenticated Trusted Intermediary can access any citizen's name and email by enumerating account IDs, bypassing group restrictions.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-107856?
CVE-2026-107856 is a medium-severity missing authorization vulnerability in civiform, published on 9 Oct 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
CiviForm simplifies applications for government benefits programs by reusing applicant data across multiple benefit applications. Prior to 3.33.0, GET /admin/tiDash/editClientForm/:accountId verifies that the requester is a Trusted Intermediary but showEditClientForm performs a raw lookupAccount(accountId) without confirming that the citizen account belongs to the requester's trustedIntermediaryGroup. An authenticated Trusted Intermediary can enumerate accountId values and read the applicant display name, including the citizen's name and email address, for accounts outside the intermediary's group. This issue is fixed in version 3.33.0.
Weakness: CWE-639
Which versions are affected by CVE-2026-107856?
How do I fix CVE-2026-107856?
No fix has been published for CVE-2026-107856 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-107856 being exploited?
There is no known exploitation of CVE-2026-107856 in the wild and no public exploit code.
Sources
Also known as GHSA-qv7c-9hjr-9rv7.