What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-11-19 · updated 2026-06-17
• Weakness: CWE-200

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.

Affected products

• knative func: before 1.8.1 — fixed in 1.8.1

How to fix

Upgrade to a fixed version: knative func 1.8.1. Check the vendor advisory for mitigations.

References

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

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