CVE-2026-61617 pterodactyl CVE debrief

Who should care

Defenders managing game-server infrastructure using Pterodactyl's Wings should assess exposure and prioritize upgrading to version 1.13.3. This includes verifying current Wings version, assessing exposure for tenants with SFTP write access, and monitoring disk usage and SFTP write activity. The vulnerability has a CVSS score of 7.7 and is considered HIGH severity.

Why it matters

CVE-2026-61617 allows tenants with SFTP write access to exhaust host node disk, impacting all servers. Defenders should verify and upgrade to version 1.13.3, assess exposure, and monitor disk usage.

• Tenant SFTP write access can lead to unbounded disk usage
• Potential for host node disk exhaustion impacting all servers
• Need for verification of current Wings version and exposure

Technical summary

In Wings versions up to and including 1.13.2, the SFTP write path does not enforce a server's disk quota during a transfer. A tenant with SFTP write access can exhaust the host node's physical disk, affecting all servers on it. This issue is fixed in version 1.13.3. The vulnerability has a CVSS score of 7.7 and is considered HIGH severity. Defenders should prioritize verifying and upgrading to version 1.13.3 if using Wings version 1.13.2 or earlier, and assess exposure for tenants with SFTP write access. The CVE record and source references indicate that a tenant with SFTP write access can exhaust the host node's physical disk, affecting all servers on it.

Defensive priority

Defenders should prioritize verifying and upgrading to version 1.13.3 if using Wings version 1.13.2 or earlier, and assess exposure for tenants with SFTP write access.

Recommended defensive actions

• Verify Wings version and upgrade to 1.13.3 if necessary
• Assess exposure for tenants with SFTP write access
• Monitor disk usage and SFTP write activity
• 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
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and source references indicate that a tenant with SFTP write access can exhaust the host node's physical disk, affecting all servers on it. This issue is fixed in version 1.13.3. Defenders should verify and upgrade to version 1.13.3 if using Wings version 1.13.2 or earlier, and assess exposure for tenants with SFTP write access. The vulnerability has a CVSS score of 7.7 and is considered HIGH severity.

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.