Medium severity · published Oct 27, 2026
CVE-2026-12887
In affected versions of Octopus Server, a user with permission to upload a malicious nuget package is able to deploy a script step so the script executes outside of the parent…
New
5.1
CVSS
0.2%
EPSS
No
On KEV
Description
In affected versions of Octopus Server, a user with permission to upload a malicious nuget package is able to deploy a script step so the script executes outside of the parent directory.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 15% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OS
Octopus Server · Octopus Deploy
2023.0.0 before 2026.1.674; 2026.1 before 2026.1.674; 2026.2 before 2026.2.973; 2026.3 before 2026.3.5839 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-12887
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-12887
advisories.octopus.com
https://advisories.octopus.com/post/2026/sa2026-14/
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