CRLF Injection Affecting github.com/lxc/incus/internal/instance package, versions <6.21.0
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMLXCINCUSINTERNALINSTANCE-15091893
- published26 Jan 2026
- disclosed22 Jan 2026
- creditrmcnamara-snyk
Introduced: 22 Jan 2026
CVE-2026-23953 Â (opens in a new tab)How to fix?
Upgrade github.com/lxc/incus/internal/instance to version 6.21.0 or higher.
Overview
Affected versions of this package are vulnerable to CRLF Injection via improper validation of environment variable values in the container configuration process. An attacker can execute arbitrary commands as root on the host by injecting newlines into environment variables, which results in the addition of unintended configuration items such as lifecycle hooks.
Note: LTS release version 6.0.6 also contains the patch.