Encoding Error Affecting nginx package, versions [1.29.4,1.30.1)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-NGINX-16680403
- published14 May 2026
- disclosed13 May 2026
- creditMufeed VH
Introduced: 13 May 2026
CVE-2026-42926 (opens in a new tab)How to fix?
Upgrade nginx to version 1.30.1 or higher.
Overview
Affected versions of this package are vulnerable to Encoding Error in the proxy_set_body process when proxying HTTP/2 traffic with proxy_http_version set to 2. An attacker can manipulate upstream communication by injecting arbitrary frame headers and payload bytes to the upstream peer.