CVE-2026-48958
Joomla! Core - [20260712] - Incorrect Access Control in com_fields webservice endpoints
An improper access check allows unauthorized users to create custom fields via webservices endpoints.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- High
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Joomla! Core - [20260712] - Incorrect Access Control in com_fields webservice endpoints
An improper access check allows unauthorized users to create custom fields via webservices endpoints.
- Record
CVE-2026-48958- CVSS 4.0
- 6.4 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:H/SI:H/SA:H - Weakness
- CWE-284
- Updated
- 2026-11-02
EUVDEUVD-2026-42068
An improper access check allows unauthorized users to create custom fields via webservices endpoints.
- Record
EUVD-2026-42068- CVSS 4.0
- 6.4 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:H/SI:H/SA:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-c3p9-2r8w-w7xv
An improper access check allows unauthorized users to create custom fields via webservices...
An improper access check allows unauthorized users to create custom fields via webservices endpoints.
- Record
GHSA-c3p9-2r8w-w7xv- CVSS 4.0
- 6.4 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:H/SI:H/SA:H/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 - CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-284
- Updated
- 2026-11-02
NVD
An improper access check allows unauthorized users to create custom fields via webservices endpoints.
- Record
CVE-2026-48958- CVSS 4.0
- 6.4 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:H/SI:H/SA:H/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 - CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-284
- Updated
- 2026-11-02
OSV
An improper access check allows unauthorized users to create custom fields via webservices endpoints.
- Record
CVE-2026-48958- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVBIT-joomla-2026-48958 No score
Joomla! Core - [20260712] - Incorrect Access Control in com_fields webservice endpoints
An improper access check allows unauthorized users to create custom fields via webservices endpoints.
- Record
BIT-joomla-2026-48958- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
joomlaBitnami |
4.0.0 up to 5.4.7, 6.0.0 up to 6.1.2 | 5.4.76.1.2 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-48958 is a medium vulnerability (CVSS 6.4) in Joomla Joomla\!, published July 7, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.46%, the 40th percentile. Fixed in joomla 5.4.7.