Is there a public exploit for CVE-2026-44580?

No public exploit for CVE-2026-44580 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-44580?

CVE-2026-44580 scores CVSS 6.1 (v3.1), rated medium. EPSS puts the chance of exploitation in the next 30 days at 0.21%.

What does CVE-2026-44580 affect?

CVE-2026-44580 affects vercel next.

6.1 Medium

Next.js is a React framework for building full-stack web applications.

CVE-2026-44580

Impact Applications that use beforeInteractive scripts together with untrusted content can be vulnerable to cross-site scripting. In affected versions, serialized script content was not escaped safely before being embedded into the document, which could allow attacker-controlled input to break out of the intended script context and execute arbitrary JavaScript in a visitor's browser. Fix We now HTML-escape serialized beforeInteractive script content before embedding it into the page, preventing attacker-controlled content from breaking out of the inline script boundary. Workarounds If you cannot upgrade immediately, do not pass untrusted data into beforeInteractive scripts. If that pattern is unavoidable, sanitize or escape the content before embedding it.

Assessment

CVSS: 6.1 (v3.1)
Severity: Medium
EPSS: 0.21% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 11 May 2026
Last updated: 26 October 2026
Affected: vercel · next.js · next
Weakness: CWE-79
Assigner: security-advisories@github.com

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

At the source

References

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