---
title: "CVE-2026-77929: ClipBucket - Remote Code Execution"
description: "ClipBucket v5 < 5.5.3-#182 contains a remote code execution caused by improper file extension update after MIME validation in FileUpload::manageFile(), letting authenticated users execute PHP code via photo upload endpoint."
url: https://panop.io/threat-heartbeat/CVE-2026-77929/
---

# CVE-2026-77929 ClipBucket - Remote Code Execution

ClipBucket v5 < 5.5.3-#182 contains a remote code execution caused by improper file extension update after MIME validation in FileUpload::manageFile(), letting authenticated users execute PHP code via photo upload endpoint.

CVSS base score 8.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.94% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-77929)

## Details

Type

Remote Code Execution

Impact

Remote Code Execution

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Published

18 September 2026

Updated

15 October 2026

Weakness

[CWE-434](https://cwe.mitre.org/data/definitions/434.html)

## Vendor fix

Upgrade to version 5.5.3-#182 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-77929](https://nvd.nist.gov/vuln/detail/CVE-2026-77929)
- [https://github.com/MacWarrior/clipbucket-v5/commit/61cce55ab26ef88fb782dfde47b44c17c56978cd](https://github.com/MacWarrior/clipbucket-v5/commit/61cce55ab26ef88fb782dfde47b44c17c56978cd)
- [https://github.com/MacWarrior/clipbucket-v5/releases/tag/5.5.3-%23182](https://github.com/MacWarrior/clipbucket-v5/releases/tag/5.5.3-%23182)
- [https://www.vulncheck.com/advisories/clipbucket-remote-code-execution-via-photo-upload-endpoint](https://www.vulncheck.com/advisories/clipbucket-remote-code-execution-via-photo-upload-endpoint)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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