Critical severity9.8NVD Advisory· Published Sep 22, 2021· Updated Jun 17, 2026

CVE-2021-31819

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected packages

Versions sourced from the GitHub Security Advisory.

Package	Affected versions	Patched versions
HalibutNuGet	< 4.4.7	4.4.7

Affected products

Octopus/Halibutv52 versions
unspecified+ 1 more
- (no CPE)range: unspecified
- cpe:2.3:a:octopus:halibut:*:*:*:*:*:*:*:*range: <4.4.7
ghsa-coords
pkg:nuget/halibut
Range: < 4.4.7

Patches

Vulnerability mechanics

References

github.com/advisories/GHSA-hpf7-4c2g-9chfghsaADVISORY
nvd.nist.gov/vuln/detail/CVE-2021-31819ghsaADVISORY
advisories.octopus.com/adv/2021-08---Remote-Code-Execution-via-Deserialisation-in-the-Halibut-Protocol-(CVE-2021-31819).2250309681.htmlghsaWEB
advisories.octopus.com/adv/2021-08---Remote-Code-Execution-via-Deserialisation-in-the-Halibut-Protocol-%28CVE-2021-31819%29.2250309681.htmlnvd

News mentions

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cvss	0.637
epss	0.002
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000