CVE-2026-1466Network attack vector

Stored XSS via invalid upload MIME type

Published Jan 28, 2026 · Updated Jan 28, 2026

Stored cross-site scripting in Jirafeau file previews before 4.7.1 allows remote attackers to execute JavaScript when a user opens a file. The upload path accepts a manipulated MIME type such as image, and f.php serves the file inline without disabling browser MIME sniffing, so an SVG payload is interpreted as active content. Successful exploitation requires a user to open the preview, after which script runs in the Jirafeau origin and can read or alter application data available to that user.

CVSS severity6.1
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in Jirafeau file previews before 4.7.1 allows remote attackers to execute JavaScript when a user opens a file. The upload path accepts a manipulated MIME type such as image, and f.php serves the file inline without disabling browser MIME sniffing, so an SVG payload is interpreted as active content. Successful exploitation requires a user to open the preview, after which script runs in the Jirafeau origin and can read or alter application data available to that user.

The record

CVE
CVE-2026-1466
Published
Jan 28, 2026
Updated
Jan 28, 2026
Vendor
Jirafeau project
Product
Jirafeau
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <4.7.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Jirafeau project · Jirafeauversion=0 <4.7.1

Published CVSS scores

6.1GitLab Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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