CVE-2021-31819

CRITICAL

Halibut < 4.4.7 - Remote Code Execution via Deserialization

Title source: llm

Description

In Halibut versions prior to 4.4.7 there is a deserialisation vulnerability that could allow remote code execution on systems that already trust each other based on certificate verification.

References (1)

Core 1

Core References

Various Sources x_refsource_misc

https://advisories.octopus.com/adv/2021-08---Remote-Code-Execution-via-Deserialisation-in-the-Halibut-Protocol-%28CVE-2021-31819%29.2250309681.html

Scores

CVSS v3 9.8

EPSS 0.0186

EPSS Percentile 83.3%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE

CWE-502

Status published

Products (2)

nuget/Halibut 0 - 4.4.7NuGet

octopus/halibut < 4.4.7

Published Sep 22, 2021

Tracked Since Feb 18, 2026