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Fencer Vulns
medium 5.5

CVE-2023-33546 json

janino vulnerable to denial of service due to stack overflow

published 2023-06-01 3 y ago modified 2026-06-17 4 mo ago also GHSA-gcg6-xv4f-f749 , EUVD-2023-1800

cvss
5.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 26%
public exploits
0
none known

Summary

Janino 3.1.9 and earlier are subject to denial of service (DOS) attacks when using the expression evaluator.guess parameter name method. If the parser runs on user-supplied input, an attacker could supply content that causes the parser to crash due to a stack overflow. NOTE: this is disputed by multiple parties because Janino is not intended for use with untrusted input.

Patch / fix

  • janino Debian 14, Debian 13 3.1.12+dfsg-1

debian advisories DEBIAN-CVE-2023-33546

  • janino openSUSE Leap 15.5, openSUSE Leap 15.4 3.1.10-150200.3.7.1

suse advisories SUSE-SU-2023:3385-1

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-2023-33546 updated cvss 6.2

janino: DoS in expression evaluator.guess parameter name method

  • Red Hat build of OptaPlanner 8 optaplanner-maven-repository optaplanner-maven-repository
    affected: no fix available “Fix deferred”
  • Red Hat Fuse 7 janino Red Hat JBoss Data Grid 7 janino Red Hat JBoss Fuse 6 janino Red Hat JBoss Fuse Service Works 6 janino
    affected: no fix planned “Out of support scope”
  • Red Hat Satellite 6 janino
    affected: no fix available
  • Red Hat A-MQ Clients 2 janino Red Hat Migration Toolkit for Applications 6 org.ow2.asm Red Hat Migration Toolkit for Runtimes org.ow2.asm Red Hat build of Apache Camel for Spring Boot 3 janino Red Hat Data Grid 8 janino Red Hat Integration Camel K 1 janino
    +4 more products
    Red Hat Integration Camel Quarkus 2 janino Red Hat JBoss Enterprise Application Platform 7 janino Red Hat JBoss Enterprise Application Platform Expansion Pack janino Red Hat streams for Apache Kafka janino
    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

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.33% chance of exploitation in the next 30 days, higher than 26% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/janino-compiler/janino/issues/201 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
GitHub 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
maven org.codehaus.janino:janino-parent
<=3.1.9
 no fix listed

Classification

Weakness

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.