TI-2026-69007 Aliases CVE-2026-102478 GHSA-r946-p43h-mw8h

Privilege escalation in Octopus Server through improper role validation

LOW 39CWE-1289Published 2026-10-07 · Updated 2026-10-07

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: —
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

In Octopus Deploy Octopus Server from 2023.2.945 before 2026.1.11768, from 2026.2.0 before 2026.2.13408, and from 2026.3.0 before 2026.3.15816, an authenticated user with permission to modify roles can bypass protections against access abuse and gain privileges. The flaw is improper validation of unsafe equivalence in input (CWE-1289), which lets the built-in role be weakened and the attacker's account added to a privileged team. Exploitation requires low privileges and needs no user interaction, and the CVSS 4.0 base score is 8.7.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

In affected versions of Octopus Server, an authenticated user with permission to modify roles could bypass the protections preventing access abuse resulting in privilege escalation. It was possible for the built-in role to be weakened and the attacker's account added to a privileged team. This was achievable due to improper validation of unsafe equivalence in inputs.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00295 22nd percentileScored 2026-11-07

Fix Fixed Octopus Server (Octopus Deploy): 2026.1.11768, 2026.2.13408, 2026.3.15816

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Octopus Deploy	Octopus Server	2023.2.945 to before 2026.1.11768; 2026.2.0 to before 2026.2.13408; 2026.3.0 to before 2026.3.15816	2026.1.11768, 2026.2.13408, 2026.3.15816	Patch available	CNA

Octopus Server VendorOctopus Deploy Affected 2023.2.945 to before 2026.1.11768; 2026.2.0 to before 2026.2.13408; 2026.3.0 to before 2026.3.15816 Fixed in 2026.1.11768, 2026.2.13408, 2026.3.15816 Patch available CNA

Remediation

Upgrade Octopus Server to 2026.1.11768, 2026.2.13408, or 2026.3.15816, depending on the release branch in use. The sources list no advisory identifier for this fix.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Fix · CNA Octopus Server (Octopus Deploy) Fixed in 2026.1.11768, 2026.2.13408, 2026.3.15816

Timeline

2026-10-07 Threatist record created from CVE-2026-102478
2026-10-07 Alias added: GHSA-r946-p43h-mw8h
2026-10-07 CISA SSVC decision points changed
2026-10-07 Priority changed: MEDIUM → LOW

References

Other 1

https://advisories.octopus.com/post/2026/sa2026-11

TI-2018-13353 In Octopus Deploy 2018.8.0 through 2018.9.x before 2018.9.1, an authenticated user with… CVSS 3.0HIGH 8.8
TI-2022-02375 Improper authentication in Octopus Server CVSS 3.1CRITICAL 9.8
TI-2022-02579 Insufficient session expiration in Octopus Server CVSS 3.1CRITICAL 9.1
TI-2021-11816 Deserialization of untrusted data in Octopus Deploy Halibut CVSS 3.1CRITICAL 9.8
TI-2018-08066 In Octopus Deploy 2018.4.4 through 2018.5.1, Octopus variables that are sourced from the… CVSS 3.0CRITICAL 9.8
TI-2022-02575 In affected versions of Octopus Deploy it is possible to bypass rate limiting on login using null bytes. CVSS 3.1CRITICAL 9.8

See all 117 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences