Red Hat Security Advisory: nginx:1.26 security update
nginx is a web and proxy server supporting HTTP and other protocols, with a focus on high concurrency, performance, and low memory usage. Security Fix(es): * nginx: NGINX: Data injection via man-in-the-middle attack on TLS proxied connections (CVE-2026-1642) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
AI Analysis
Technical Summary
CVE-2026-1642 is a vulnerability in nginx that permits data injection through a man-in-the-middle attack on TLS proxied connections. This vulnerability was identified and addressed by Red Hat Product Security in their advisory RHSA-2026:6311. The issue affects nginx packages distributed with Red Hat Enterprise Linux 10.0 Extended Update Support and associated CodeReady Linux Builder variants. Red Hat has released updated nginx packages (version 1.26.3-1.el10_0.3) to fix this vulnerability. The advisory rates the security impact as Moderate and provides instructions for applying the update.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker positioned as a man-in-the-middle to inject data into TLS proxied connections handled by nginx. This could compromise the integrity of proxied data streams. The advisory classifies the impact as moderate severity, indicating a significant but not critical risk.
Mitigation Recommendations
Red Hat has released an official security update that fixes this vulnerability. Users of affected Red Hat Enterprise Linux 10.0 Extended Update Support and related CodeReady Linux Builder products should apply the nginx update as described in Red Hat advisory RHSA-2026:6311 and the referenced article https://access.redhat.com/articles/11258. Applying this update mitigates the vulnerability. No additional mitigation steps are specified or required beyond applying the official patch.
Red Hat Security Advisory: nginx:1.26 security update
Description
nginx is a web and proxy server supporting HTTP and other protocols, with a focus on high concurrency, performance, and low memory usage. Security Fix(es): * nginx: NGINX: Data injection via man-in-the-middle attack on TLS proxied connections (CVE-2026-1642) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-1642 is a vulnerability in nginx that permits data injection through a man-in-the-middle attack on TLS proxied connections. This vulnerability was identified and addressed by Red Hat Product Security in their advisory RHSA-2026:6311. The issue affects nginx packages distributed with Red Hat Enterprise Linux 10.0 Extended Update Support and associated CodeReady Linux Builder variants. Red Hat has released updated nginx packages (version 1.26.3-1.el10_0.3) to fix this vulnerability. The advisory rates the security impact as Moderate and provides instructions for applying the update.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker positioned as a man-in-the-middle to inject data into TLS proxied connections handled by nginx. This could compromise the integrity of proxied data streams. The advisory classifies the impact as moderate severity, indicating a significant but not critical risk.
Mitigation Recommendations
Red Hat has released an official security update that fixes this vulnerability. Users of affected Red Hat Enterprise Linux 10.0 Extended Update Support and related CodeReady Linux Builder products should apply the nginx update as described in Red Hat advisory RHSA-2026:6311 and the referenced article https://access.redhat.com/articles/11258. Applying this update mitigates the vulnerability. No additional mitigation steps are specified or required beyond applying the official patch.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:6311
- Cve Count
- 1
- Additional Cves
- []
- Cvss Version
- null
Threat ID: 6a3da1bf4853345fc181c380
Added to database: 06/25/2026, 21:46:39 UTC
Last enriched: 06/25/2026, 21:51:49 UTC
Last updated: 07/31/2026, 19:22:57 UTC
Views: 36
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