# CVE-2026-6861: Emacs: emacs: memory corruption vulnerability when processing svg css

> A local attacker can cause denial of service or information disclosure in GNU Emacs by tricking a user into opening a malicious SVG file.

- **Severity:** Medium 6.1 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 22 Apr 2026
- **Updated:** 22 Apr 2026
- **Also known as:** AZL-84638, DEBIAN-CVE-2026-6861, GHSA-w658-hxq6-43mx, MGASA-2026-0213, OESA-2026-2129, OESA-2026-2130, OESA-2026-2131, SUSE-SU-2026:21801-1, UBUNTU-CVE-2026-6861, USN-8835-1, openSUSE-SU-2026:10619-1, openSUSE-SU-2026:20759-1

## What is CVE-2026-6861?

CVE-2026-6861 is a medium-severity memory corruption vulnerability in Red Hat Enterprise Linux 10, published on 22 Apr 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

A flaw was found in GNU Emacs. This vulnerability, a memory corruption issue, occurs when Emacs processes specially crafted SVG (Scalable Vector Graphics) CSS (Cascading Style Sheets) data. A local user could exploit this by convincing a victim to open a malicious SVG file, which may lead to a denial of service (DoS) or potentially information disclosure.

Weakness: CWE-193 (Off-by-one Error)

## Which versions are affected by CVE-2026-6861?

It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `emacs` | openSUSE:Tumbleweed | All versions | 30.2-8.1 |

Products: Gnu Emacs.

## How do I fix CVE-2026-6861?

Apply the vendor's patch.

## Is CVE-2026-6861 being exploited?

There is no known exploitation of CVE-2026-6861 in the wild and no public exploit code.

## Other vulnerabilities in Red Hat Enterprise Linux 10

- [CVE-2007-6109](https://insights.sbomify.com/CVE-2007-6109/): Memory corruption in n/a (critical 10.0)
- [CVE-2024-39331](https://insights.sbomify.com/CVE-2024-39331/): Code injection in n/a (critical 9.8)
- [CVE-2024-53920](https://insights.sbomify.com/CVE-2024-53920/): Code injection in n/a (high 7.8)
- [CVE-2024-30202](https://insights.sbomify.com/CVE-2024-30202/): Code injection in n/a (high 7.8)
- [CVE-2023-2491](https://insights.sbomify.com/CVE-2023-2491/): Command injection in emacs (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-6861 and fix it if it is affected.

What it is: CVE-2026-6861 is a medium-severity memory corruption vulnerability in Red Hat Enterprise Linux 10, published on 22 Apr 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-6861 in the wild and no public exploit code.

Affected product: Red Hat Enterprise Linux 10. 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-2026-6861/ (Markdown: https://insights.sbomify.com/CVE-2026-6861/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-6861
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-6861
- OSV: https://osv.dev/vulnerability/CVE-2026-6861

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-6861/
Summaries are generated and may contain mistakes; the official description above is the record.