CVE-2026-39416Network attack vector

Stored XSS via untyped long-item preview

Published Apr 8, 2026 · Updated Apr 8, 2026

Stored XSS in AIL Framework before 6.8 allows remote attackers to execute JavaScript when an authenticated user previews a crafted item. The modal item preview returns attacker-controlled content longer than 800 characters without an explicit text/plain content type, so browsers parse it as active HTML. Exploitation requires an authenticated user to open the crafted preview, and the script runs in that user's AIL browser context.

CVSS severity8.5
High
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in AIL Framework before 6.8 allows remote attackers to execute JavaScript when an authenticated user previews a crafted item. The modal item preview returns attacker-controlled content longer than 800 characters without an explicit text/plain content type, so browsers parse it as active HTML. Exploitation requires an authenticated user to open the crafted preview, and the script runs in that user's AIL browser context.

The record

CVE
CVE-2026-39416
Published
Apr 8, 2026
Updated
Apr 8, 2026
Vendor
AIL Project
Product
AIL Framework
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 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=< 6.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

AIL Project · AIL Frameworkversion=< 6.8

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
8.5GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H

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.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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