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beetl EUVDEUVD-2026-48431

| CVE-2026-52439 CRITICAL
Improper Neutralization of Special Elements used in an Expression Language Statement (CWE-917)
2026-07-23 mitre GHSA-7p56-cmc7-rq84
9.8
CVSS 3.1 · Vendor: mitre
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Severity by source

Vendor (mitre) PRIMARY
9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vuln.today AI
9.8 CRITICAL

Network-accessible, unauthenticated injection with no user interaction.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (mitre).

CVSS VectorVendor: mitre

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

4
Analysis Generated
Jul 26, 2026 - 11:57 vuln.today
CVSS changed
Jul 24, 2026 - 20:22 NVD
9.8 (CRITICAL)
CVE Published
Jul 23, 2026 - 00:00 cve.org
CRITICAL 9.8
CVE Published
Jul 23, 2026 - 00:00 cve.org
UNKNOWN (no severity yet)

DescriptionCVE.org

An issue in xiandafu beetl 3.20.2 allows a remote attacker to execute arbitrary code via the type.new function and the property reflection mechanism

AnalysisAI

Remote code execution in beetl 3.20.2 allows unauthenticated remote attackers to execute arbitrary code via the type.new function and property reflection. Public proof-of-concept exploit code exists, though EPSS exploitation probability is low (0.24%) and no active exploitation has been reported to CISA KEV.

Technical ContextAI

Beetl is a Java template engine. The vulnerability is a CWE-917 expression language injection, where the type.new function and property reflection mechanism can be misused to instantiate arbitrary Java classes and execute code. The affected product is version 3.20.2, as indicated in the CVE description and the referenced Gitee issue IJO1HM.

RemediationAI

No vendor-released patch is currently available; the vulnerability is tracked in Gitee issue IJO1HM (https://gitee.com/xiandafu/beetl/issues/IJO1HM). As an immediate mitigation, restrict template evaluation to trusted templates only and disable the type.new function and property reflection mechanisms if configurable. Deploying web application firewalls or application layer filtering to block malicious expressions can also reduce exposure, though this may not fully prevent bypasses. If beetl is used in a project, avoid processing user-supplied templates entirely until a fix is released.

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EUVD-2026-48431 vulnerability details – vuln.today

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