# CVE-2026-118426: CVE-2026-118426

Status: published. Published: 2026-10-29. Updated: 2026-11-05.

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Octopus Deploy / Octopus Server: ≥ 3.0.0; < 2026.2.13487 (affected, custom); ≥ 2026.3.0; < 2026.3.15909 (affected, custom). Source: CNA: Octopus; platforms: Windows, Linux

## Severity and prioritization

- CVSS 4.0: 5.3 (medium); 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; source: CNA: Octopus

- CVSS 4.0: 5.3 (medium); 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X; source: NVD: security@octopus.com

- CISA KEV: No listing in collected sources

- EPSS: 0.27% as of 2026-11-05; percentile 19.09%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-862

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://advisories.octopus.com/post/2026/sa2026-18 (CNA: Octopus)

- https://advisories.octopus.com/post/2026/sa2026-18 (security@octopus.com)

## Provenance

- CNA: Octopus: https://www.cve.org/CVERecord?id=CVE-2026-118426; retrieved 2026-11-05; source updated 2026-11-05

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-118426; retrieved 2026-11-05; source updated 2026-11-05

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-118426; retrieved 2026-11-05; source updated Not reported

Revision: 07b880d1c66d6a337321adcaf70391dbaca610d5cc830a14725d0b639ab67891

Canonical: https://y2.dev/cve/CVE-2026-118426

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.