# CVE-2026-107888: Null dereference in CUPS

> An unprivileged user can cause a denial of service in CUPS by triggering a NULL pointer dereference during temporary printer cleanup.

- **Severity:** Medium 5.1 (`CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 9 Oct 2026
- **Updated:** 15 Oct 2026
- **Also known as:** AZL-106890, BELL-CVE-2026-107888, DEBIAN-CVE-2026-107888, ECHO-dae6-2944-98b5, GHSA-95mw-jr52-2v5f, GHSA-qqm8-4q5h-jg55, UBUNTU-CVE-2026-107888

## What is CVE-2026-107888?

CVE-2026-107888 is a medium-severity vulnerability in OpenPrinting CUPS, published on 9 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

OpenPrinting CUPS before 2.4.20 contains a NULL pointer dereference in cupsdCheckJobs() when a job marked job-held-on-create refers to a temporary printer that has been automatically deleted. Temporary-printer cleanup can remove the destination without canceling its held jobs, and the scheduler dereferences the NULL result of cupsdFindDest() while checking holding_new_jobs. This terminates cupsd and interrupts all queues managed by that process. In some plausible scenarios, an unprivileged submission can trigger this.

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2026-107888?

It affects 1 product.


Products: Openprinting Cups.

## How do I fix CVE-2026-107888?

Upgrade to a fixed version.

## Is CVE-2026-107888 being exploited?

There is no known exploitation of CVE-2026-107888 in the wild and no public exploit code.

## Other vulnerabilities in OpenPrinting CUPS

- [CVE-2025-58060](https://insights.sbomify.com/CVE-2025-58060/): cups has Authentication bypass with AuthType Negotiate (high 8.0)
- [CVE-2026-34978](https://insights.sbomify.com/CVE-2026-34978/): Path traversal in cups (medium 6.5)
- [CVE-2025-58364](https://insights.sbomify.com/CVE-2025-58364/): cups: Remote DoS via null dereference (medium 6.5)
- [CVE-2026-34980](https://insights.sbomify.com/CVE-2026-34980/): OpenPrinting CUPS: Shared PostScript queue lets anonymous Print-Job requests reach `lp` code execution over the network (medium 6.1)
- [CVE-2025-61915](https://insights.sbomify.com/CVE-2025-61915/): OpenPrinting CUPS vulnerable to stack based out-of-bound write (medium 6.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-107888 and fix it if it is affected.

What it is: CVE-2026-107888 is a medium-severity vulnerability in OpenPrinting CUPS, published on 9 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-107888 in the wild and no public exploit code.

Affected product: OpenPrinting CUPS. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-107888/ (Markdown: https://insights.sbomify.com/CVE-2026-107888/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-107888
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-107888
- OSV: https://osv.dev/vulnerability/CVE-2026-107888

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-107888/
Summaries are generated and may contain mistakes; the official description above is the record.