What is the CVSS score of CVE-2026-24476?

CVE-2026-24476 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 Shaarli are affected by CVE-2026-24476?

Organizations using Shaarli should be aware of moderate risk from CVE-2026-24476, a cross-site scripting vulnerability rated CVSS 5.4.. A patch is available.

Is there a public PoC exploit available for CVE-2026-24476?

Yes, a public proof-of-concept exploit is available for CVE-2026-24476. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-24476?

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

Shaarli CVE-2026-24476

MEDIUM

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

2026-01-26 security-advisories@github.com

XSS Shaarli Shaarli Project

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

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 - 22:00 vuln.today

PoC Detected

Feb 17, 2026 - 20:45 vuln.today

Public exploit code

Patch released

Feb 17, 2026 - 20:45 nvd

Patch available

CVE Published

Jan 26, 2026 - 23:16 nvd

MEDIUM 5.4

DescriptionGitHub Advisory

Shaarli is a personal bookmarking service. Prior to version 0.16.0, crafting a malicious tag which starting with " prematurely ends the <input> tag on the start page and allows an attacker to add arbitrary html leading to a possible XSS attack. Version 0.16.0 fixes the issue.

AnalysisAI

Stored XSS in Shaarli versions before 0.16.0 allows authenticated attackers to inject malicious HTML by crafting tags starting with a double quote character, which breaks out of input tag validation on the homepage. An attacker with login credentials can exploit this to execute arbitrary JavaScript in victims' browsers with the victim's interaction. A patch is available in version 0.16.0 and public exploit code exists.

Technical ContextAI

Classified as CWE-79 (Cross-site Scripting (XSS)). Affects Shaarli. Shaarli is a personal bookmarking service. Prior to version 0.16.0, crafting a malicious tag which starting with " prematurely ends the <input> tag on the start page and allows an attacker to add arbitrary html leading to a possible XSS attack. Version 0.16.0 fixes the issue.

RemediationAI

A vendor patch is available — apply it immediately. Implement output encoding and Content Security Policy headers. Restrict network access to the affected service where possible.