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CVE-2026-39416: Stored XSS in modal item preview for long item content in AIL Framework

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-08 · updated 2026-07-24
• Weakness: CWE-79

Description

AIL framework is an open-source platform to collect, crawl, process and analyse unstructured data. Prior to 6.8, a stored cross-site scripting (XSS) vulnerability was identified in the modal item preview functionality. When item content longer than 800 characters was processed, attacker-controlled content was returned without an explicit text/plain content type, allowing the browser to interpret the response as active HTML. This could result in execution of arbitrary JavaScript in the context of an authenticated user viewing a crafted item. This vulnerability is fixed in 6.8.

Affected products

• ail-project ail-framework: through 6.7

References

• https://github.com/ail-project/ail-framework/security/advisories/GHSA-fj6v-43r7-gcjm
• https://vulnerability.circl.lu/vuln/gcve-1-2026-0023

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