CVE-2026-108740

GoatCounter through 2.7.0 Privilege Escalation via /user/pref Mass Assignment

CVSS score

7.2

EPSS probability

—

Risk score

0.7

Published

1 d ago

Overview Public Exploits (0)Newsroom Vulnerability Timeline

Patch status has not yet been verified

Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.

Impact on My Inventory

Only the personal products you have added to your account are assessed; an organisation's inventory does not appear here.

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Vulnerability description

CVE AI research

The stored explanation is shown at once; refreshing evaluates the sources again.

DayBreach AI Explanation

Verified against sources

GoatCounter Privilege Escalation Vulnerability

Sources read

Source agreement

0/2

Evidence confidence

%47

Short explanation

A mass assignment vulnerability in GoatCounter versions allows logged-in users to modify protected account fields and escalate privileges.

Why does it matter?

Attackers with read-only access can abuse sensitive parameters to gain superuser or administrator access.

What should be done?

Follow vendor advisories and updates
Audit user privileges and request handlers
Strengthen authorization controls

Note on uncertainty

2 alanda kaynak uyuşmazlığı var. DayBreach bu değerleri saklamadı; kaynak karşılaştırması aşağıda gösteriliyor.

Chain of evidence and sources2 verified claims

GoatCounter sürümlerinde userPrefSave işleyicisi üzerinden ayrıcalık yükseltmeye izin veren bir kitle atama zafiyeti bulunmaktadır.

S0 · daybreach-canonical S1 · cvelist S2 · nvd

Saldırganlar /user/pref adresine form kodlu istek göndererek readonly etiketlerini atlayabilmektedir.

S0 · daybreach-canonical S1 · cvelist S2 · nvd

Show the technical text from the sources

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 vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N

CWE: CWE-915

Explanation produced with the local gemini-flash-lite-latest model. Numerical metrics and the KEV, patch and exploit statuses are not determined by AI.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-108740 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

ID	VENDOR	PRODUCT	ACTION
1	arp242	GoatCounter	View

Total affected vendors: 1|Products: 1

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCORE	VERSION	SEVERITY	VECTOR	SOURCE
8.3	CVSS V3_1	HIGH	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H	CVE CNA
8.3	CVSS V31	HIGH	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H	NVD
7.2	CVSS V4_0	HIGH	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N	CVE CNA
7.2	CVSS V40	HIGH	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X	NVD

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.

Restrict access to internet-facing services and apply network segmentation.

Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.

Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-108740 is associated with the following CWEs:

CWE-915: Common Weakness Enumeration Entry CWE-915

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-108740 weaknesses.

CAPEC-66: SQL Injection CAPEC-126: Path Traversal CAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden

PermissionsLow

UserGerekmiyor

Official Sources and Advisories

https://hackmd.io/@haind03/goatcounter-user-pref-access-mass-assignment-20261011vendor-advisory https://github.com/arp242/goatcounter/blob/7e91d8a9bdbb0dd48496e498c5680f8f3477a1b4/handlers/settings_user.go#L33-L99vendor-advisory https://github.com/arp242/goatcounter/blob/7e91d8a9bdbb0dd48496e498c5680f8f3477a1b4/user.go#L191-L218vendor-advisory https://github.com/arp242/goatcountervendor-advisory VulnCheck Advisory: GoatCounter through 2.7.0 Privilege Escalation via /user/pref Mass Assignmentvendor-advisory

CVSS Vector Radar Chart

7.2 / 10

Vulnerability Scoring Details

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow privileges

User InteractionNone required

Confidentiality (Gizlilik)Low

Integrity (Bütünlük)None

Availability (Erişilebilirlik)High

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Follow the vendor

arp242

Weakness Type (CWE & CAPEC)

CWE-915

Get this vulnerability through the API

Affected products, version ranges, exploitation status and patch information in a single request, with a free key.

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