TI-2026-82269 Aliases CVE-2026-118426 GHSA-j7xx-fgfg-xff8

Missing authorization in Octopus Server LDAP search lets users query directory

LOW 24CWE-862Published 2026-10-29 · Updated 2026-11-05

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-862.

Summary

Octopus Server from 3.0.0 before 2026.2.13487 and from 2026.3.0 before 2026.3.15909 has a missing authorization check (CWE-862) when the LDAP authentication provider is enabled. Any authenticated user can call the LDAP user search and LDAP group search. The CVSS 4.0 vector shows a remote attacker with low privileges and no user interaction, with a limited impact on confidentiality.

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

Description from the CNA

In affected versions of Octopus Server with the LDAP authentication provider enabled, any authenticated user could call the LDAP user search and LDAP group search.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00268 19th percentileScored 2026-11-07

Fix Fixed Octopus Server (Octopus Deploy): 2026.2.13487, 2026.3.15909

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

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	3.0.0 to before 2026.2.13487; 2026.3.0 to before 2026.3.15909	2026.2.13487, 2026.3.15909	Patch available	CNA

Octopus Server VendorOctopus Deploy Affected 3.0.0 to before 2026.2.13487; 2026.3.0 to before 2026.3.15909 Fixed in 2026.2.13487, 2026.3.15909 Patch available CNA

Remediation

Upgrade Octopus Server to 2026.2.13487 or 2026.3.15909, or a later version. The sources list no vendor 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 2026.2.13487, 2026.3.15909

Timeline

2026-10-29 Threatist record created from CVE-2026-118426
2026-10-29 Alias added: GHSA-j7xx-fgfg-xff8
2026-11-05 CISA SSVC decision points changed

References

Other 1

https://advisories.octopus.com/post/2026/sa2026-18

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