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Fencer Vulns
medium 5.3

CVE-2023-51079 json

mvel2 TimeOut error exists in the ParseTools.subCompileExpression method

published 2023-12-27 2 y ago modified 2026-06-17 4 mo ago also GHSA-h63j-xqx6-w58r , EUVD-2023-3218

cvss
5.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 54%
public exploits
0
none known

Summary

A long execution time can occur in the ParseTools.subCompileExpression method in MVEL 2.5.0.Final because of many Java class lookups. NOTE: the vendor disputes this because "the only thing that you could expect is that the parser will take a crazy amount of time to complete its task."

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-51079 updated cvss 5.3

mvel: TimeOut error when calling ParseTools.subCompileExpression() function

  • Red Hat build of Apache Camel 4.4.1 for Spring Boot 3.2
    fixed: vendor fix RHSA-2024:4884
  • Red Hat OpenShift Serverless mvel Red Hat build of Apache Camel for Spring Boot 3 mvel Red Hat Build of Keycloak mvel Red Hat build of OptaPlanner 8 mvel Red Hat build of Quarkus mvel2 Red Hat Data Grid 8 mvel
    +11 more products
    Red Hat Decision Manager 7 mvel Red Hat Fuse 7 mvel Red Hat Integration Camel K 1 mvel Red Hat JBoss Data Grid 7 mvel Red Hat JBoss Enterprise Application Platform 6 mvel, rh-sso7-keycloak rh-sso7-keycloak, keycloak-adapter-eap6 keycloak-adapter-eap6, keycloak-adapter-sso7_2-eap6 keycloak-adapter-sso7_2-eap6, keycloak-adapter-sso7_3-eap6 keycloak-adapter-sso7_3-eap6, org.keycloak-keycloak-parent org.keycloak-keycloak-parent Red Hat JBoss Enterprise Application Platform 7 mvel Red Hat JBoss Enterprise Application Platform 8 mvel Red Hat JBoss Enterprise Application Platform Expansion Pack mvel Red Hat Process Automation 7 mvel Red Hat Single Sign-On 7 mvel Red Hat streams for Apache Kafka mvel
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.74% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/mvel/mvel/issues/348 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
GitHub 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected packages

ecosystem package affected fixed in
maven org.mvel:mvel2
1 listed version
 no fix listed

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.