Sources: National Vulnerability Database, CVE.org, CISA KEV, FIRST EPSS
CVE-2026-93879 Overview
Hibernate Validator could allow a remote attacker to cause a denial of service due to uncontrolled resource consumption resulting from improper escaping of user-controlled data in Expression Language (EL) expressions.
Critical Impact
Affected Products
- IBM Hibernate Validator: see the vendor advisory for the exact affected versions
Discovery Timeline
- 2026-11-08: CVE-2026-93879 published to the National Vulnerability Database by psirt@us.ibm.com
- 2026-11-08: last updated in the NVD database
Technical Details for CVE-2026-93879
Vulnerability Analysis
CVE-2026-93879 is a Uncontrolled Resource Consumption weakness (CWE-400: Uncontrolled Resource Consumption) in IBM Hibernate Validator. Based on its CVSS vector, the flaw can be reached over the network, needs no login, and needs no user interaction. An attacker can exhaust CPU, memory or connections.
With a CVSS base score of 7.5, apply the vendor fix and confirm exposure on internet facing and business critical assets first.
Root Cause
The weakness is classified as CWE-400: Uncontrolled Resource Consumption. An attacker can exhaust CPU, memory or connections.
Attack Vector
Based on the CVSS vector, the flaw can be reached over the network, needs no login, and needs no user interaction. Attack complexity is low complexity.
No exploitation in the wild is confirmed by CISA at the time of the last update. Check the references below for any vendor or researcher proof of concept.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Detection Methods for CVE-2026-93879
Detection Strategies
- Inventory every instance of IBM Hibernate Validator and compare the running version with the affected range above.
- Check external attack surface scans for internet facing instances of the component.
- Run an authenticated vulnerability scan once your scanner ships a check for this CVE.
Monitoring Recommendations
- Forward IBM Hibernate Validator application, access and audit logs to your SIEM for retrospective hunting.
- Alert on new processes, configuration changes or outbound connections from the affected service.
- Track the vendor advisory and the CISA KEV catalog for changes in exploitation status.
How to Mitigate CVE-2026-93879
Immediate Actions Required
- Apply the fixed version of IBM Hibernate Validator named in the vendor advisory.
- Prioritize internet facing and business critical instances first.
- Rescan after the change to confirm the exposure is closed.
Patch Information
Use the fixed version listed in the vendor advisory for IBM Hibernate Validator.
Workarounds
- If patching must wait, restrict network access to the affected service and place it behind authentication or a web application firewall rule.
CWE References
- CWE-400: Uncontrolled Resource Consumption More CVEs with this weakness
Technical References
This entry is built directly from NVD, CISA KEV and EPSS data. Verify fixed versions in the vendor advisory before you deploy.
Frequently asked questions
Related CVEs
IBM Bob 1.0.4 through 2.0.1 could allow a remote attacker to inject arbitrary code on the system, due to the improper control of user input code.
IBM Langflow OSS 1.0.0 through 1.12.2 An authenticated flow author could write attacker-controlled file content into any directory writable by the service account, bypassing the platform's local file access isolation safeguard. Via a crafted on-disk index, the attacker could also read the contents of arbitrary files accessible to the service process — including configuration files, secrets, or database files stored under the application's data directory.
IBM Security Verify Directory 10.0.0 through 10.0.4 and IBM Verify Directory 11.0.0 is vulnerable to session fixation. An attacker can establish a session and, after the victim authenticates, hijack the authenticated session to gain unauthorized access to the directory management console.
IBM Concert 1.0 through 3.0.1.1 allows an attacker can supply crafted input that is incorporated into an operating system command without adequate validation or sanitization. Successful exploitation allows remote attackers to execute arbitrary commands on the underlying operating system with the privileges of the affected service.
IBM Storage TS4500 Library 1.1.1.6 through 1.12.0.3 could allow a remote authenticated attacker to perform unauthorized account takeover due to improper authorization.
IBM CockroachDB PostgreSQL for IBM VPC 26.2.0 through 26.2.3, 25.4.0 through 25.4.12, and 25.2.0 through 25.2.20 is vulnerable to privilege escalation via user-defined function.
Earn your free CTEM certification.
Learn to scope, prioritize, validate and mobilize fixes for CVEs like CVE-2026-93879 with a free CTEM certification.
Beginner / Practitioner / Program Leader
Explore certifications