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TI-2022-20280 Aliases CVE-2022-41939

Credential exposure when running third-party builders in knative/func

Priority HIGH 66CWE-200Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-200.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00993 62nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed func (knative): 1.8.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
knativefuncbefore 1.8.11.8.1Patch availableCNA
  • func Vendorknative Affected before 1.8.1 Fixed in 1.8.1 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:linuxfoundation:knative_func:*:*:*:*:*:*:*:*before 1.8.1Vulnerablebackstage
  • cpe:2.3:a:linuxfoundation:knative_func:*:*:*:*:*:*:*:* Versions before 1.8.1 Vulnerable ·backstage

Remediation

  • Fix · CNA func (knative) Fixed in 1.8.1

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-41939

References

Exploit 1

Patch 1

Advisory 2

  • TI-2026-81393 Memory exhaustion in Knative pkg admission webhook via request body CVSS 3.1MEDIUM 6.5
  • TI-2023-26552 Knative Serving vulnerable to attacker-controlled pod causing denial of service of autoscaler CVSS 3.1MEDIUM 6.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences