What’s Vulnerable › Vulnerabilities

CVE-2024-31216: source-controller leaks theAzure Storage SAS token into logs on connection errors

• Severity: medium (CVSS 5.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-05-15 · updated 2026-06-17
• Weakness: CWE-532

Description

The source-controller is a Kubernetes operator, specialised in artifacts acquisition from external sources such as Git, OCI, Helm repositories and S3-compatible buckets. The source-controller implements the source.toolkit.fluxcd.io API and is a core component of the GitOps toolkit. Prior to version 1.2.5, when source-controller was configured to use an Azure SAS token when connecting to Azure Blob Storage, the token was logged along with the Azure URL when the controller encountered a connection error. An attacker with access to the source-controller logs could use the token to gain access to the Azure Blob Storage until the token expires. This vulnerability was fixed in source-controller v1.2.5. There is no workaround for this vulnerability except for using a different auth mechanism such as Azure Workload Identity.

Affected products

• fluxcd source-controller: before 1.2.5

References

• https://github.com/fluxcd/source-controller/commit/915d1a072a4f37dd460ba33079dc094aa6e72fa9
• https://github.com/fluxcd/source-controller/pull/1430
• https://github.com/fluxcd/source-controller/security/advisories/GHSA-v554-xwgw-hc3w
• https://github.com/fluxcd/source-controller/commit/915d1a072a4f37dd460ba33079dc094aa6e72fa9
• https://github.com/fluxcd/source-controller/pull/1430
• https://github.com/fluxcd/source-controller/security/advisories/GHSA-v554-xwgw-hc3w

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