CVE-2026-108740
High
Description
GoatCounter through 2.7.0 contains a mass assignment privilege escalation vulnerability in the userPrefSave handler that allows logged-in users to modify protected account fields via form-encoded requests. Attackers with read-only access can POST user.access[all]=* and user.email_verified=true to /user/pref, bypassing readonly tags to gain superuser or admin access.
SeverityHigh
CVSS8.3
Exploit probability—
Product
GoatCounter
PublishedOct 11, 2026
First seenOct 11, 2026
Weakness typeCWE-915CWE-915
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| arp242 GoatCounter | v ≤ 2.7.0 | — |
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