CVE-2026-4837: An eval() injection vulnerability in the Rapid7 Insight Agent beaconing logic for Linux versions could theoret

Q: How do I fix CVE-2026-4837?

insight agent: upgrade to 4.1.0.2. Exact commands for each OS are on this page.

Q: Is CVE-2026-4837 being exploited?

CVE-2026-4837 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-4837 affect?

CVE-2026-4837 affects insight agent. Severity is medium (CVSS 6.6). 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

Q: How urgent is CVE-2026-4837?

Priority 37/100. On your watchlist

Routine

MEDIUM 6.6WATCHLISTUPGRADE

CVE-2026-4837 is a medium-severity flaw (CVSS 6.6) affecting insight agent. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	6.6 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	High
User interaction	None
EPSS exploit chance	0.4% (top 65%)
CISA exploited list	No
Weakness	CWE-95
Published	2026-04-08
Last modified	2026-07-24

Publisher (CNA): Rapid7, Inc. · Vendor: rapid7

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-08 17:21 UTCPublished CVE record published
2026-07-24 20:10 UTCUpdated Record last modified

rapid7 insight agent UPGRADE

Affected: < 4.1.0.2

Fixed in: 4.1.0.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy insight-agent || rpm -q insight-agent || insight-agent --version

2. UPGRADE to 4.1.0.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade insight-agent

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade insight-agent

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-4837?

insight agent: upgrade to 4.1.0.2. Exact commands for each OS are on this page.

Is CVE-2026-4837 being exploited?

CVE-2026-4837 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-4837 affect?

CVE-2026-4837 affects insight agent. Severity is medium (CVSS 6.6). 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

How urgent is CVE-2026-4837?

Priority 37/100. On your watchlist

Related CVEs

CVE-2026-4482 MEDIUM 5.5 UPGRADE The installer certificate files in the …/bootstrap/common/ssl folder do not seem to have restricted permission
CVE-2026-6482 HIGH 7.8 UPGRADE The Rapid7 Insight Agent (versions > 4.1.0.2) is vulnerable to a local privilege escalation attack that allows

References

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