Is CVE-2026-78222 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-78222?

CVE-2026-78222 has a CVSS v3 severity of HIGH (7.5).

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CVE-2026-78222

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.