Is CVE-2026-27857 actively exploited?

No active exploitation of CVE-2026-27857 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-27857 be exploited remotely?

Yes. CVE-2026-27857 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-27857?

CVE-2026-27857 has a CVSS score of 4.3 (MEDIUM).

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MEDIUM

CVE-2026-27857

CWE-400Published: March 27, 2026· Updated: Mar 30, 2026

4.3

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:11.6th

Official Description

Sending "NOOP (((...)))" command with 4000 parenthesis open+close results in ~1MB extra memory usage. Longer commands will result in client disconnection. This 1 MB can be left allocated for longer time periods by not sending the command ending LF. So attacker could connect possibly from even a single IP and create 1000 connections to allocate 1 GB of memory, which would likely result in reaching VSZ limit and killing the process and its other proxied connections. Attacker could connect possibly from even a single IP and create 1000 connections to allocate 1 GB of memory, which would likely result in reaching VSZ limit and killing the process and its other proxied connections. Install fixed version, there is no other remediation. No publicly available exploits are known.

NVD Source

Technical Analysis

CVE-2026-27857 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.