CVE-2026-26997: MacWarrior clipbucket-v5 · Cross-site Scripting
Affects MacWarrior clipbucket-v5Source CVE Database V5
Public exploit available · CVSS 2.0 Low : upgrade to 5.5.3 as a priority.
Data as of 30 Oct 2026, 11:52 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 14% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 5.5.3
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:PExploitation evidence
Disclosed: evidence found.
CVE published 27 Feb 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: evidence found.
CVSS exploit maturity: proof of concept public
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CVSS vector, the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
Upgrade macwarrior/clipbucket-v5 to 5.5.3.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| MacWarriorclipbucket-v5 | Affected
| Fixed in– |
GitHubmacwarrior/clipbucket-v5pkg:github/macwarrior/clipbucket-v5Other threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
To mitigate CVE-2026-26997, organizations should immediately upgrade ClipBucket to version 5.5.3 #59 or later, where the vulnerability is fixed. Beyond upgrading, administrators should implement strict role-based access controls to limit the number of users with upload or content submission privileges, reducing the attack surface. Employ web application firewalls (WAFs) with rules designed to detect and block common XSS payloads, especially targeting administrative interfaces. Conduct regular security audits and code reviews focusing on input validation and output encoding practices. Train administrators to recognize suspicious content and avoid interacting with untrusted user-generated inputs without proper sanitization. Additionally, implement Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in the browser context. Monitoring and logging administrative access and unusual activities can help detect exploitation attempts early. Finally, consider sandboxing or isolating administrative interfaces to minimize the impact of potential XSS attacks.
Description
ClipBucket v5 is an open source video sharing platform. Prior to version 5.5.3 #59, a normal authenticated user can store the XSS payload. The payload is triggered by administrator. Version 5.5.3 #59 fixes the issue.