Vulnerability · CVE-2025-66478
Next.js is vulnerable to RCE in React flight protocol
Published Dec 3, 2025 · catalog updated Dec 11, 2025 · GitHub_M
Last checked Nov 1, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2025-66478. EPSS is 0.00%. Act only if a listed version of GitHub_M is installed.
Gaps on this record
- No version range is stored. A customer cannot check an installed version against this record.
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- None0.0
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.00%
- Remediation
- Advisory link
- Affected products
- vendor GitHub_M
Next.js is vulnerable to RCE in React flight protocol
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- vendor GitHub_Mversion unspecified
How to fix CVE-2025-66478
No stored fix
No vendor fix text is stored. Use the linked advisory before you change production.
Version check
No version range is stored, so an installed version cannot be checked on this page.
Advisory
Open the cve_org record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2025-66478. EPSS is 0.00%. Act only if a listed version of GitHub_M is installed.
Which versions are affected?
Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 0.00%. There is no CISA KEV listing. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.
Technology hubs
Code
The project this record applies to. Exploit listings stay in References.
Timeline
Detection, updates, and resolution for this record.
Dec 3, 2025 · EUVD
Detected
Next.js is vulnerable to RCE in React flight protocol
Dec 11, 2025 · EUVD
Updated
Next.js is vulnerable to RCE in React flight protocol
Sources
- CVE.orgVulnerability recordCVE-2025-66478
Official CVE identifier
cve.org - EUVDVulnerability recordEUVD-2025-200984
Next.js is vulnerable to RCE in React flight protocol
euvd.enisa.europa.eu - Metasploit ModulesPublic exploit moduleexploit_multi/http/react2shell_unauth_rce_cve_2025_55182
Public module reference (excellent). Module source is not copied into this catalog.
rapid7.com - urlscan.ioThreat intelligenceCVE-2025-66478urlscan.io
References
Freshness
Last verified in this catalog Dec 11, 2025. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- urlscan.ioNov 1, 2026
- Metasploit ModulesOct 30, 2026
- CVE.orgOct 27, 2026
- EUVDOct 27, 2026