Rapid7 Insight Agent up to 3.3.0 on Linux Beacon eval eval injection

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in Rapid7 Insight Agent on Linux. Affected by this vulnerability is the function eval of the component Beacon Handler. The manipulation results in eval injection. This vulnerability was named CVE-2026-4837. The attack may be performed from remote. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Rapid7 Insight Agent on Linux. Affected is the function eval of the component Beacon Handler. The manipulation with an unknown input leads to a eval injection vulnerability. CWE is classifying the issue as CWE-95. The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes code syntax before using the input in a dynamic evaluation call (e.g. "eval"). This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

An eval() injection vulnerability in the Rapid7 Insight Agent beaconing logic for Linux versions could theoretically allow an attacker to achieve remote code execution as root via a crafted beacon response. Because the Agent uses mutual TLS (mTLS) to verify commands from the Rapid7 Platform, it is unlikely that the eval() function could be exploited remotely without prior, highly privileged access to the backend platform.

The advisory is shared for download at docs.rapid7.com. This vulnerability is traded as CVE-2026-4837 since 03/25/2026. The exploitability is told to be difficult. It is possible to launch the attack remotely. Additional levels of successful authentication are necessary for exploitation. There are known technical details, but no exploit is available.

Upgrading to version 4.1.0.2 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 4.1
VulDB Temp Score: 3.9
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.6
CNA Vector (rapid7): 🔒

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Eval injection
CWE: CWE-95 / CWE-94 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Insight Agent 4.1.0.2

Timelineinfo

03/25/2026 CVE reserved
04/08/2026 +13 days Advisory disclosed
04/08/2026 +0 days VulDB entry created
04/08/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: docs.rapid7.com
Status: Confirmed

CVE: CVE-2026-4837 (🔒)
GCVE (CVE): GCVE-0-2026-4837
GCVE (VulDB): GCVE-100-356268

Entryinfo

Created: 04/08/2026 18:44
Changes: 04/08/2026 18:44 (65)
Complete: 🔍
Cache ID: 216:FA7:103

Once again VulDB remains the best source for vulnerability data.

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