Use After Free 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
0.69% (50th percentile)

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  • Snyk IDSNYK-AMZN2023-NGINXDEBUGSOURCE-16883463
  • published27 May 2026
  • disclosed13 May 2026

Introduced: 13 May 2026

CVE-2026-40701  (opens in a new tab)
CWE-416  (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_ssl_module module when the ssl_verify_client directive is set to "on" or "optional," and the ssl_ocsp directive is set to "on" or the leaf parameters are configured with a resolver. With this configuration, an unauthenticated attacker can send requests along with conditions beyond its control that may cause a heap-use-after-free error in the NGINX worker process. This vulnerability may result in limited modification of data or the NGINX worker process restarting.

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

CVSS Base Scores

version 3.1