CVE-2026-108740: Improperly Controlled Modification of Dynamically-Determined Object Attributes in arp242 GoatCounter
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.
CVSS v4.0
Score 7.2high
Affected software
arp242
GoatCounter
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-108740 describes a mass assignment vulnerability in GoatCounter through version 2.7.0. The userPrefSave handler improperly controls modification of dynamically-determined object attributes, enabling attackers with read-only access to escalate privileges. By POSTing parameters such as user.access[all]=* and user.email_verified=true to the /user/pref endpoint, attackers can bypass readonly tags and gain superuser or admin access.
Potential Impact
An attacker with read-only access can escalate privileges to superuser or admin by exploiting this vulnerability. This compromises account integrity and potentially the entire application security, allowing unauthorized administrative actions.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-10-11T01:52:55.041Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6acb85c22cdf04f656d09a27
Added to database: 10/11/2026, 12:49:06 UTC
Last enriched: 10/11/2026, 13:03:32 UTC
Last updated: 10/11/2026, 21:33:16 UTC
Views: 12
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