Buffer Over-read Affecting nginx-debugsource package, versions <1:1.30.1-1.amzn2023.0.1


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.73% (51st percentile)

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  • Snyk IDSNYK-AMZN2023-NGINXDEBUGSOURCE-16883363
  • published27 May 2026
  • disclosed13 May 2026

Introduced: 13 May 2026

CVE-2026-42934  (opens in a new tab)
CWE-126  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 nginx-debugsource to version 1:1.30.1-1.amzn2023.0.1 or higher.
This issue was patched in ALAS2023-2026-1714.

NVD Description

Note: Versions mentioned in the description apply only to the upstream nginx-debugsource package and not the nginx-debugsource package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_charset_module module. When charset, source_charset, and charset_map and proxy_pass with disabled buffering ("off") directives are configured, unauthenticated attackers can send requests that with conditions beyond the attackers' control to cause a heap buffer over-read in the NGINX worker process, leading to limited disclosure of memory or a restart.

 Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS Base Scores

version 3.1