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CVE-2026-118426VulnerabilityPublished

In affected versions of Octopus Server with the LDAP authentication provider enabled, any authenticated user could

Source GCVE Database

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Authoritative record:CVE-2026-118426· Medium 5.3

Not known to be exploited · CVSS 5.3 Medium : upgrade to 2026.3.15909 or 2026.2.13487 when convenient.

Data as of 29 Oct 2026, 07:12 UTC

CVSS 4.0 base score
5.3Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (Octopus)CVSS 4.05.3
Patch
Available – fixed in 2026.3.15909, 2026.2.13487
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 29 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade Octopus Server to 2026.3.15909 or 2026.2.13487.

Affected software

ProductAffectedFixed in
Octopus DeployOctopus ServerAffected
  • >=2026.3.0 <2026.3.15909
Fixed in
  • 2026.3.15909
Octopus DeployOctopus ServerAffected
  • >=3.0.0 <2026.2.13487
Fixed in
  • 2026.2.13487

AI-suggested

In the meantime, consider restricting LDAP authentication usage or limiting user permissions as a precaution.

Description

In certain versions of Octopus Server with LDAP authentication enabled, any authenticated user could perform LDAP user and group searches. This vulnerability allows authenticated users to query LDAP directory information beyond their intended permissions.

References

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