# CVE-2026-104077: Obsidian Desktop < 1.14.0 RCE via Slides Plugin Markdown

> Attackers can execute arbitrary code by crafting malicious Markdown notes that bypass sanitization in the Slides plugin, requiring user interaction to start the presentation.

- **Severity:** High 8.5 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **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:** No
- **Published:** 8 Oct 2026
- **Updated:** 27 Oct 2026
- **Also known as:** GHSA-fj5r-pww3-qc5p

## What is CVE-2026-104077?

CVE-2026-104077 is a high-severity cross-site scripting vulnerability in Obsidian Desktop, published on 8 Oct 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

Obsidian Desktop before 1.14.0 contains a remote code execution vulnerability that allows attackers to craft malicious Markdown notes exploiting insufficient sanitization of the data-background-iframe attribute, which bypasses DOMPurify and is processed by the bundled Reveal.js 4.3.1 within the Slides core plugin, allowing a javascript: URL to execute in the resulting background iframe. Because Node integration is enabled and context isolation is disabled in Obsidian's vault renderer, the injected script can call parent.require() to access Node APIs such as fs and child_process, enabling arbitrary operating system command execution when the victim opens the note and manually starts the presentation.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation), CWE-1188 (Initialization of a Resource with an Insecure Default)

## Which versions are affected by CVE-2026-104077?


## How do I fix CVE-2026-104077?

No fix has been published for CVE-2026-104077 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-104077 being exploited?

There is no known exploitation of CVE-2026-104077 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-104077 and fix it if it is affected.

What it is: CVE-2026-104077 is a high-severity cross-site scripting vulnerability in Obsidian Desktop, published on 8 Oct 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-2026-104077 in the wild and no public exploit code.

Affected product: Obsidian Desktop. 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-2026-104077/ (Markdown: https://insights.sbomify.com/CVE-2026-104077/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-104077
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-104077
- OSV: https://osv.dev/vulnerability/CVE-2026-104077

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-104077/
Summaries are generated and may contain mistakes; the official description above is the record.