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CVE-2023-33546

16
FAUCET Score

CVE-2023-33546 affects Janino versions 3.1.9 and earlier, where a denial-of-service (DoS) vulnerability exists in the expression evaluator's guess parameter name method. An attacker could trigger a stack overflow by providing specially crafted input to the parser, leading to a crash. The vulnerability has a CVSS score of 5.5 (Medium), indicating a local attack vector with low complexity, requiring user interaction, and resulting in high availability impact. Despite the potential for DoS, its exploitability is disputed due to Janino's intended use case not involving untrusted input, and there is no evidence of active exploitation, public exploit code, or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.1.9CPE matchmatch criteria
cpe:2.3:a:janino_project:janino:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.33%
Probability of exploitation in next 30 days
EPSS Percentile
25.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0033 is in the 32nd percentile among its peer group of 5,760 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (2)

redhatvendor investigatingvia redhat_api
Product: Red Hat build of OptaPlanner 8Fixed in: optaplanner-maven-repository
redhatno patchvia redhat_api
Product: Red Hat Satellite 6Fixed in: janino

Vendor Advisories (2)

mavenGHSA-gcg6-xv4f-f749medium

janino vulnerable to denial of service due to stack overflow

Jun 1, 2023
redhatCVE-2023-33546Moderate

janino: DoS in expression evaluator.guess parameter name method

Jun 1, 2023

References

github.com / janino-compiler/janino/issues/201
ExploitIssue TrackingThird Party Advisory
janino-compiler.github.io / janino