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HIGH severity

CVE-2026-93879

HIGH

CVE-2026-93879 is a high-severity (CVSS 7.5) Uncontrolled Resource Consumption vulnerability. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

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…

Published
Updated
Affected
—
Patched
—
Exploits
None indexed
Exploitation data as of Nov 8, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Description

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.

Detection & mitigation playbook

Vulnerability

  1. Detect

    Identify every host running the affected component and compare the installed build against the fixed version below — for source-built or distro-packaged software the version string, not a lockfile, is the source of truth (`dpkg -l`, `rpm -q`, or the binary's own `--version`).

  2. Remediation status

    The records we use list no fixed release for CVE-2026-93879. Check the upstream advisory for a patched version, and apply the exposure-reduction steps below in the meantime.

  3. Mitigate without a patch

    Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatModerate

Red Hat Product Security rates this vulnerability as Moderate because it enables a denial of service through resource exhaustion without compromising data integrity or confidentiality. Applications utilizing Hibernate Validator to process untrusted input may experience thread starvation or high CPU usage when…

Workaround published by Red Hat
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Source: Red Hat security advisory for CVE-2026-93879 (CC BY 4.0)
ProductFixed inAdvisory
Red Hat build of Quarkus 3.27.6.redhatorg.hibernate.validator/hibernate-validator:9.0.1.Final-redhat-00002RHSA-2026:83082
Red Hat build of Quarkus 3.33.4.redhatorg.hibernate.validator/hibernate-validator:9.1.3.Final-redhat-00002RHSA-2026:83520

Frequently Asked Questions

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.
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CVE-2026-93879: High 7.5 severity