What is the CVSS score of CVE-2026-26997?

CVE-2026-26997 has a CVSS 3.1 base score of 5.4 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of Clipbucket are affected by CVE-2026-26997?

Organizations using ClipBucket v5 should be aware of moderate risk from CVE-2026-26997, a cross-site scripting vulnerability rated CVSS 5.4.. A patch is available.

Is there a public PoC exploit available for CVE-2026-26997?

Yes, a public proof-of-concept exploit is available for CVE-2026-26997. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-26997?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Clipbucket CVE-2026-26997

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2026-02-27 security-advisories@github.com

XSS Clipbucket

5.4

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

5.4 MEDIUM

AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

PoC Detected

Mar 03, 2026 - 20:10 vuln.today

Public exploit code

Patch released

Mar 03, 2026 - 20:10 nvd

Patch available

CVE Published

Feb 27, 2026 - 20:21 nvd

MEDIUM 5.4

DescriptionGitHub Advisory

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.

AnalysisAI

Stored cross-site scripting in ClipBucket v5 prior to version 5.5.3 #59 allows authenticated users to inject malicious scripts that execute when viewed by administrators, enabling session hijacking or credential theft. Public exploit code exists for this vulnerability, which affects the open-source video sharing platform and has been patched in the latest release.

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Vulnerability AssessmentAI

Risk Assessment	CVSS 5.4 (MEDIUM). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An attacker (requires authentication) could exploit this vulnerability to compromise the affected system.
Remediation	A vendor patch is available — apply it immediately. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. …

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CVE-2026-26997 vulnerability details – vuln.today

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