CVE-2026-78222
NGINX ngx_http_js_module vulnerability
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
A vulnerability exists in NGINX JavaScript where a malformed HTTP response received by ngx.fetch() can crash an NGINX worker when trusted JavaScript reads Response.statusText. Exploitation requires control or influence over the fetched HTTP response. Impact: This vulnerability may allow remote attackers to cause a denial-of-service (DoS) on the NGINX system. There is no control plane exposure; this is a data plane issue only. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
| CWE | CWE-476 |
| Vendor | f5 |
| Product | nginx javascript |
| Published | Sep 2, 2026 |
| Last Updated | Sep 2, 2026 |
Stay Ahead of the Next One
Get instant alerts for f5 nginx javascript
Be the first to know when new high vulnerabilities affecting f5 nginx javascript are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
F5 / NGINX JavaScript
0.5.1 < 1.0.1
Credits
🔍 F5 acknowledges Sujal Tuladhar (EvilGenius) and YuuLuo for bringing this issue to our attention and following the highest standards of coordinated disclosure.