CVE-2025-15224 curl CVE debrief

Who should care

Defenders and administrators using curl for SSH-based transfers, especially in environments where public key authentication is used, should verify curl versions and configurations to prevent unintended SSH agent authentication. They should assess exposure in environments using curl for data transfer and review and update curl to version 8.18.0 or later if using a vulnerable version.

Why it matters

CVE-2025-15224 is a vulnerability in curl that affects SSH-based transfers using SCP or SFTP with public key authentication. Defenders should verify curl versions and configurations, assess exposure, and update curl to version 8.18.0 or later if necessary.

• Verify curl configurations to prevent unintended SSH agent authentication
• Assess exposure in environments using curl for data transfer
• Review and update curl to version 8.18.0 or later if using a vulnerable version

Technical summary

The curl library incorrectly uses a locally running SSH agent for public key authentication during SSH-based transfers using SCP or SFTP. This vulnerability affects curl versions prior to 8.18.0. Defenders should prioritize verifying curl versions and configurations, especially where SSH-based transfers using SCP or SFTP with public key authentication are used. Additional information on affected versions and exploitation is limited. The vulnerability allows curl to incorrectly use a locally running SSH agent for public key authentication.

Defensive priority

Defenders should prioritize verifying curl versions and configurations, especially where SSH-based transfers using SCP or SFTP with public key authentication are used.

Recommended defensive actions

• Verify curl versions and configurations for SSH-based transfers using SCP or SFTP with public key authentication
• Assess exposure in environments using curl for data transfer
• Review and update curl to version 8.18.0 or later if using a vulnerable version
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, but additional information on affected versions and exploitation is limited. Defenders should verify curl versions and configurations to prevent unintended SSH agent authentication. The vulnerability affects SSH-based transfers using SCP or SFTP with public key authentication.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.