# CVE-2026-78222

## Summary

- **CVE ID:** CVE-2026-78222
- **Severity:** HIGH
- **CVSS Score:** 8.7 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-476
- **Published:** Sep 2, 2026
- **Last Modified:** Sep 2, 2026

## Description

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.

## Affected Products

- F5 — NGINX JavaScript (0.5.1)

## References

- [CNA](https://my.f5.com/manage/s/article/K000162603)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.37%
- **EPSS Percentile:** 30.5

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._