# CVE-2026-45035: Tabby: RCE via `tabby://run` URL Scheme

> Attackers can execute arbitrary OS commands with user privileges by tricking victims into clicking a malicious tabby:// URL.

- **Severity:** Critical 9.4 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 15 May 2026
- **Updated:** 21 May 2026
- **Also known as:** GHSA-hf8h-rjrf-3jg6

## What is CVE-2026-45035?

CVE-2026-45035 is a critical command injection vulnerability in Eugeny tabby, published on 15 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Tabby (formerly Terminus) is a highly configurable terminal emulator. Prior to 1.0.233, Tabby registers itself as the handler for the tabby:// URL scheme on all platforms. The URL scheme handler supports a run command that directly executes OS commands with no user confirmation, sanitization, or sandboxing. An attacker can craft a malicious link (tabby://run?command=...) and deliver it via a website, email, chat message, or any other medium. When a victim clicks the link, the OS launches Tabby which immediately spawns the specified command as a child process with the user's full privileges. This is a zero-click-after-link-visit RCE vulnerability. This vulnerability is fixed in 1.0.233.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2026-45035?

It affects 1 product.


Products: Tabby Tabby.

## How do I fix CVE-2026-45035?

No fix has been published for CVE-2026-45035 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-45035 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-45035 exists.

## Other vulnerabilities in Eugeny tabby

- [CVE-2026-45038](https://insights.sbomify.com/CVE-2026-45038/): Tabby: Dragging and Dropping a File into Tabby Can Lead to Code Execution (high 8.4)
- [CVE-2026-46709](https://insights.sbomify.com/CVE-2026-46709/): Tabby: Drag-and-drop path injection still allows RCE via shell command substitution (incomplete fix for CVE-2026-45038) (high 7.8)
- [CVE-2026-45037](https://insights.sbomify.com/CVE-2026-45037/): Tabby: Unsafe protocol handler execution via terminal linkifier allows arbitrary OS protocol invocation (high 7.1)
- [CVE-2026-45036](https://insights.sbomify.com/CVE-2026-45036/): Command injection in tabby (high 7.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-45035 and fix it if it is affected.

What it is: CVE-2026-45035 is a critical command injection vulnerability in Eugeny tabby, published on 15 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-45035 exists.

Affected product: Eugeny tabby. 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-2026-45035/ (Markdown: https://insights.sbomify.com/CVE-2026-45035/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-45035
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-45035
- OSV: https://osv.dev/vulnerability/CVE-2026-45035

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-45035/
Summaries are generated and may contain mistakes; the official description above is the record.