Vulnerability in Octopus Deploy Octopus Server

[ Description ]Official description

In affected versions of Octopus Server, OIDC token issuer validation was performed inconsistently. This could result in a token issued from a suitably configured non legitimate issuer being accepted as a token belonging to a service account from a legitimate trusted issuer. Exploitation requires a service account with at least one OIDC identity configured. An attacker would also need to know or guess some details of that identity in order to be in a position to attempt exploitation.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund26 Oct 2026WID-SEC-2026-4164

  Octopus Deploy: Multiple vulnerabilities Translated from German

  CVE-2026-116870CVE-2026-12887CVE-2026-117341+1 more CVEs

[ References ]References

• advisories.octopus.com/post/2026/sa2026-15