# CVE-2026-107890: Null dereference in CUPS

> A crafted IPP request causes a NULL pointer dereference in CUPS, crashing the scheduler and disrupting all print queues.

- **Severity:** Low 3.3 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 9 Oct 2026
- **Updated:** 13 Oct 2026
- **Also known as:** AZL-106884, BELL-CVE-2026-107890, CLSA-2026-1792166076, DEBIAN-CVE-2026-107890, ECHO-2000-f066-fb3d, GHSA-q6rw-m9p2-pjq2, GHSA-wjc4-qhjr-5m5x, UBUNTU-CVE-2026-107890

## What is CVE-2026-107890?

CVE-2026-107890 is a low-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 caused by repeated IPP group tags in job-creation requests. IPP parsing creates unnamed separator attributes with IPP_TAG_ZERO, but add_job() converts these separators to IPP_TAG_JOB. During job startup, get_options()/ipp_length() subsequently calls strlen() on a NULL attribute name, terminating cupsd and disrupting all queues. A single crafted Print-Job request can trigger the crash when the client can reach the scheduler and submit jobs to an accepting, enabled queue supporting the submitted document format. Anonymous submission is possible when permitted by listener and access-control configuration.

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2026-107890?

It affects 1 product.


Products: Openprinting Cups.

## How do I fix CVE-2026-107890?

Upgrade to a fixed version.

## Is CVE-2026-107890 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-107890 exists.

## 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-2026-107890 and fix it if it is affected.

What it is: CVE-2026-107890 is a low-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: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-107890 exists.

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-2026-107890/ (Markdown: https://insights.sbomify.com/CVE-2026-107890/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-107890
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-107890
- OSV: https://osv.dev/vulnerability/CVE-2026-107890

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-107890/
Summaries are generated and may contain mistakes; the official description above is the record.