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Vulnerability Details :

CVE-2026-26993

Summary
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
Published At-20 Feb, 2026 | 02:33
Updated At-23 Feb, 2026 | 18:09
Rejected At-
Credits

Flare has XSS vulnerability in Raw File Preview

Flare is a Next.js-based, self-hostable file sharing platform that integrates with screenshot tools. Versions 1.7.0 and below allow users to upload files without proper content validation or sanitization. By embedding malicious JavaScript within an SVG (or other active content formats such as HTML or XML), an attacker can achieve script execution in the context of the application's origin when a victim views the file in “raw” mode. This results in a stored Cross-Site Scripting (XSS) vulnerability that can be exploited to exfiltrate user data. This issue has been fixed in version 1.7.1.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:GitHub_M
Assigner Org ID:a0819718-46f1-4df5-94e2-005712e83aaa
Published At:20 Feb, 2026 | 02:33
Updated At:23 Feb, 2026 | 18:09
Rejected At:
▼CVE Numbering Authority (CNA)
Flare has XSS vulnerability in Raw File Preview

Flare is a Next.js-based, self-hostable file sharing platform that integrates with screenshot tools. Versions 1.7.0 and below allow users to upload files without proper content validation or sanitization. By embedding malicious JavaScript within an SVG (or other active content formats such as HTML or XML), an attacker can achieve script execution in the context of the application's origin when a victim views the file in “raw” mode. This results in a stored Cross-Site Scripting (XSS) vulnerability that can be exploited to exfiltrate user data. This issue has been fixed in version 1.7.1.

Affected Products
Vendor
FlintSH
Product
Flare
Versions
Affected
  • 1.7.1
Problem Types
TypeCWE IDDescription
CWECWE-79CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Type: CWE
CWE ID: CWE-79
Description: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Metrics
VersionBase scoreBase severityVector
3.14.6MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
Version: 3.1
Base score: 4.6
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://github.com/FlintSH/Flare/security/advisories/GHSA-q8fp-w6m5-4gjm
x_refsource_CONFIRM
https://github.com/FlintSH/Flare/commit/7763d7b954799552f287ab9260bb1353f8880163
x_refsource_MISC
https://github.com/FlintSH/Flare/releases/tag/v1.7.1
x_refsource_MISC
Hyperlink: https://github.com/FlintSH/Flare/security/advisories/GHSA-q8fp-w6m5-4gjm
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/FlintSH/Flare/commit/7763d7b954799552f287ab9260bb1353f8880163
Resource:
x_refsource_MISC
Hyperlink: https://github.com/FlintSH/Flare/releases/tag/v1.7.1
Resource:
x_refsource_MISC
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security-advisories@github.com
Published At:20 Feb, 2026 | 03:16
Updated At:20 Feb, 2026 | 13:49

Flare is a Next.js-based, self-hostable file sharing platform that integrates with screenshot tools. Versions 1.7.0 and below allow users to upload files without proper content validation or sanitization. By embedding malicious JavaScript within an SVG (or other active content formats such as HTML or XML), an attacker can achieve script execution in the context of the application's origin when a victim views the file in “raw” mode. This results in a stored Cross-Site Scripting (XSS) vulnerability that can be exploited to exfiltrate user data. This issue has been fixed in version 1.7.1.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.14.6MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
Type: Secondary
Version: 3.1
Base score: 4.6
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
CPE Matches

Weaknesses
CWE IDTypeSource
CWE-79Primarysecurity-advisories@github.com
CWE ID: CWE-79
Type: Primary
Source: security-advisories@github.com
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://github.com/FlintSH/Flare/commit/7763d7b954799552f287ab9260bb1353f8880163security-advisories@github.com
N/A
https://github.com/FlintSH/Flare/releases/tag/v1.7.1security-advisories@github.com
N/A
https://github.com/FlintSH/Flare/security/advisories/GHSA-q8fp-w6m5-4gjmsecurity-advisories@github.com
N/A
Hyperlink: https://github.com/FlintSH/Flare/commit/7763d7b954799552f287ab9260bb1353f8880163
Source: security-advisories@github.com
Resource: N/A
Hyperlink: https://github.com/FlintSH/Flare/releases/tag/v1.7.1
Source: security-advisories@github.com
Resource: N/A
Hyperlink: https://github.com/FlintSH/Flare/security/advisories/GHSA-q8fp-w6m5-4gjm
Source: security-advisories@github.com
Resource: N/A

Change History

0
Information is not available yet

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