Apereo openEQUELLA up to 2026.0 XML parser /api/item server-side request forgery

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k4.24-

Summaryinfo

A vulnerability categorized as critical has been discovered in Apereo openEQUELLA up to 2026.0. Impacted is an unknown function of the file /api/item of the component XML parser. The manipulation results in server-side request forgery. This vulnerability was named CVE-2026-66090. The attack may be performed from remote. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Apereo openEQUELLA up to 2026.0. Affected is an unknown functionality of the file /api/item of the component XML parser. The manipulation with an unknown input leads to a server-side request forgery vulnerability. CWE is classifying the issue as CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

In openEQUELLA before 2026.1, the XML parser used for item metadata does not disable external entity resolution. A user permitted to create items (CREATE_ITEM) can submit crafted XML to POST /api/item and cause the server to read arbitrary files accessible to the openEQUELLA service, or make requests to attacker-specified locations (SSRF), including cloud instance metadata services.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-66090 since 07/24/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. There are known technical details, but no exploit is available.

Upgrading to version 2026.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-112566). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Server-side request forgery
CWE: CWE-918
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: openEQUELLA 2026.1

Timelineinfo

07/24/2026 CVE reserved
10/29/2026 +97 days Advisory disclosed
10/29/2026 +0 days VulDB entry created
10/29/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Status: Confirmed

CNA: MON-CSIRT
CVE: CVE-2026-66090 (🔒)

GCVE (CVE): GCVE-0-2026-66090
GCVE (VulDB): GCVE-100-428268
EUVD: 🔒

Entryinfo

Created: 10/29/2026 02:52
Updated: 10/29/2026 05:40
Changes: 10/29/2026 02:52 (68), 10/29/2026 05:40 (1)
Complete: 🔍
Cache ID: 216::103

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