CVE record · CVE-2026-101169

Deserialization of untrusted data in Octopus Deploy Octopus Server

CVSS 8.7 HighEPSS 0.0035 · 28th percentile

Published by the CVE Program (CNA: Octopus) at 29 Sept 2026, 07:49 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Octopus Deploy	Octopus Server	affected 2019.4.1 to before 2026.1.11781 custom affected 2026.2.0 to before 2026.2.13441 custom affected 2026.3.0 to before 2026.3.15829 custom Other versions: unaffected

Identifiers: CVE-2026-101169
CNA: Octopus
Weakness (CWE): CWE-502
Tags: Octopus Deploy Octopus Server
Insecure deserialization
Published: 29 Sept 2026
Updated: 29 Sept 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
8.7	High	4.0	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	CNA (Octopus)

CISA KEV Not listed.
EPSS 0.0035, the 28th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 29 Sept 2026. New records show when each source confirmed them.

Sources

References from the CNA

advisories.octopus.com/post/2026/sa2026-10

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.