# CVE-2026-107886: Use after free in CUPS

> An authenticated attacker with system privileges can cause a denial of service in the CUPS scheduler via a double-free vulnerability in printer class management.

- **Severity:** Low 2.3 (`CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 9 Oct 2026
- **Updated:** 9 Oct 2026
- **Also known as:** AZL-106893, BELL-CVE-2026-107886, DEBIAN-CVE-2026-107886, ECHO-fd65-8a57-d554, GHSA-39g6-9jhp-qp3g, GHSA-pwg4-pv39-8c22, UBUNTU-CVE-2026-107886

## What is CVE-2026-107886?

CVE-2026-107886 is a low-severity use after free 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 double-free in printer-class management. When CUPS-Add-Modify-Class replaces an existing class member list, add_class() frees pclass->printers without clearing the pointer. If subsequent validation fails, the class retains the dangling pointer; CUPS-Delete-Class subsequently frees the same allocation in cupsdDeletePrinter(). A client authorized to modify and delete classes can cause scheduler-wide denial of service. The default policy requires @SYSTEM privileges.

Weakness: CWE-415 (Double Free)

## Which versions are affected by CVE-2026-107886?

It affects 1 product.


Products: Openprinting Cups.

## How do I fix CVE-2026-107886?

Upgrade to a fixed version.

## Is CVE-2026-107886 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-107886 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-2026-107886 and fix it if it is affected.

What it is: CVE-2026-107886 is a low-severity use after free 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-2026-107886 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-2026-107886/ (Markdown: https://insights.sbomify.com/CVE-2026-107886/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-107886
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-107886
- OSV: https://osv.dev/vulnerability/CVE-2026-107886

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-107886/
Summaries are generated and may contain mistakes; the official description above is the record.