SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityDeferred

CVE-2026-52466

Open Library Foundation VuFind v11.0.3 and v4.1 is vulnerable to toInorrect Access Control.

CRITICAL 9.8EPSS 0.48%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.48%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

Open Library Foundation VuFind v11.0.3 and v4.1 is vulnerable to toInorrect Access Control. The application fails to stop processing an incoming request in VuFind\Controller\AbstractBase::validateAccessPermission after it has found that controller level access permissions do not allow access to the requested function. The requester receives a response indicating that access was denied, but the actual function is executed regardless of that.

CVSS 3.1
9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
0.48% probability · 41th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Weakness
CWE-863
Source
cve@mitre.org
EPSS trend
0%3%5%27 October 2026: 0.48%27 October 202627 October 2026

EPSS 0.5% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.