# CVE-2025-43929: Security feature bypass in kitty

> Attackers can execute local binaries without user confirmation via linked documents in kitty, bypassing security prompts.

- **Severity:** Medium 4.1 (`CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:L/I:L/A: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:** Yes
- **Published:** 20 Apr 2025
- **Updated:** 21 Apr 2025
- **Also known as:** DEBIAN-CVE-2025-43929, GHSA-cch3-2vm3-v73j, UBUNTU-CVE-2025-43929

## What is CVE-2025-43929?

CVE-2025-43929 is a medium-severity vulnerability in kitty, published on 20 Apr 2025. 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

open_actions.py in kitty before 0.41.0 does not ask for user confirmation before running a local executable file that may have been linked from an untrusted document (e.g., a document opened in KDE ghostwriter).

Weakness: CWE-346 (Origin Validation Error)

## Which versions are affected by CVE-2025-43929?

It affects 1 product.


Products: Kovidgoyal Kitty.

## How do I fix CVE-2025-43929?

Upgrade to a fixed version.

## Is CVE-2025-43929 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-43929 exists.

Public exploit code:

- High severity vulnerability in KiTTY allowing for local executables to be ran without user confirmation under certain circumstances. (github_poc): https://github.com/0xBenCantCode/CVE-2025-43929

## Other vulnerabilities in kitty

- [CVE-2026-33642](https://insights.sbomify.com/CVE-2026-33642/): Kitty has a Heap Buffer Over-Read/Write via Integer Overflow in compose_rectangles Bounds Check (critical 9.9)
- [CVE-2026-42851](https://insights.sbomify.com/CVE-2026-42851/): @kitty-edit DCS + --color=geninclude vulnerable to Unauthenticated in-process RCE (high 7.8)
- [CVE-2026-54056](https://insights.sbomify.com/CVE-2026-54056/): Kitty has an arbitrary file overwrite via symlink following in `kitten dnd` remote drop staging (high 7.6)
- [CVE-2026-33633](https://insights.sbomify.com/CVE-2026-33633/): Kitty has a Heap Buffer Overflow in its Graphics Protocol Handler (high 7.5)
- [CVE-2026-42850](https://insights.sbomify.com/CVE-2026-42850/): Kitty has a shell command injection (high 7.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-43929 and fix it if it is affected.

What it is: CVE-2025-43929 is a medium-severity vulnerability in kitty, published on 20 Apr 2025. 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: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-43929 exists.

Affected product: kitty. 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-2025-43929/ (Markdown: https://insights.sbomify.com/CVE-2025-43929/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-43929
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-43929
- OSV: https://osv.dev/vulnerability/CVE-2025-43929

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-43929/
Summaries are generated and may contain mistakes; the official description above is the record.