Encoding Error Affecting nginx package, versions <1.30.0-4


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.35% (28th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-NGINX-16732789
  • published18 May 2026
  • disclosed13 May 2026

Introduced: 13 May 2026

CVE-2026-42926  (opens in a new tab)
CWE-172  (opens in a new tab)

How to fix?

Upgrade Debian:unstable nginx to version 1.30.0-4 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream nginx package and not the nginx package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

When NGINX Open Source is configured to proxy HTTP/2 traffic by setting proxy_http_version to 2, and also uses proxy_set_body, an attacker may be able to inject frame headers and payload bytes to the upstream peer.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS Base Scores

version 3.1