CVE-2026-4837
CVE-2026-4837 is a medium-severity vulnerability in Rapid7 Insight Agent with a CVSS 3.x base score of 6.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-95.
Key facts
- Severity: Medium (CVSS 3.x base score 6.6)
- EPSS exploit prediction: 0% (33rd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-20505
- Weakness: CWE-95
- Affected product: Rapid7 Insight Agent
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is CVE-2026-4837?
- 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.
- How severe is CVE-2026-4837?
- CVE-2026-4837 has a CVSS 3.x base score of 6.6, rated medium severity. It is exploitable over network with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-4837 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-4837?
- CVE-2026-4837 affects Rapid7 Insight Agent. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-4837?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2026-4837 have an EU (EUVD) identifier?
- Yes. CVE-2026-4837 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20505.
- When was CVE-2026-4837 published?
- CVE-2026-4837 was published on 2026-04-08 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:rapid7:insight_agent:*:*:*:*:*:*:*:*
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