Red Hat Security Advisory: nodejs:20 security update
Node.js is a software development platform for building fast and scalable network applications in the JavaScript programming language. Security Fix(es): * minimatch: minimatch: Denial of Service via specially crafted glob patterns (CVE-2026-26996) * minimatch: Minimatch: Denial of Service via catastrophic backtracking in glob expressions (CVE-2026-27904) * nghttp2: nghttp2: Denial of Service via malformed HTTP/2 frames after session termination (CVE-2026-27135) * Node.js: Node.js: Denial of Service due to crafted HTTP `__proto__` header (CVE-2026-21710) 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
This Red Hat security advisory (RHSA-2026:9874) addresses four denial of service vulnerabilities affecting Node.js 20 and related components. CVE-2026-21710 concerns a denial of service in Node.js caused by a crafted HTTP __proto__ header. CVE-2026-26996 and CVE-2026-27904 involve denial of service in the minimatch library due to specially crafted glob patterns and catastrophic backtracking in glob expressions, respectively. CVE-2026-27135 is a denial of service in nghttp2 triggered by malformed HTTP/2 frames after session termination. The advisory covers Red Hat Enterprise Linux 9.6 Extended Update Support and provides updated packages to fix these issues. The vulnerabilities are rated as having a high severity impact.
Potential Impact
The vulnerabilities can cause denial of service conditions in affected Node.js environments, potentially disrupting network applications that rely on Node.js 20. The issues stem from crafted inputs that trigger resource exhaustion or improper handling of protocol frames, leading to service unavailability. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released updated Node.js 20 packages (version 20.20.2 and later) that address these vulnerabilities. Users running affected versions (>=20.0.0 <20.20.2) on Red Hat Enterprise Linux 9.6 Extended Update Support should apply the available security update promptly. Detailed update instructions are available in the Red Hat advisory at https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the official update.
Red Hat Security Advisory: nodejs:20 security update
Description
Node.js is a software development platform for building fast and scalable network applications in the JavaScript programming language. Security Fix(es): * minimatch: minimatch: Denial of Service via specially crafted glob patterns (CVE-2026-26996) * minimatch: Minimatch: Denial of Service via catastrophic backtracking in glob expressions (CVE-2026-27904) * nghttp2: nghttp2: Denial of Service via malformed HTTP/2 frames after session termination (CVE-2026-27135) * Node.js: Node.js: Denial of Service due to crafted HTTP `__proto__` header (CVE-2026-21710) 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
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This Red Hat security advisory (RHSA-2026:9874) addresses four denial of service vulnerabilities affecting Node.js 20 and related components. CVE-2026-21710 concerns a denial of service in Node.js caused by a crafted HTTP __proto__ header. CVE-2026-26996 and CVE-2026-27904 involve denial of service in the minimatch library due to specially crafted glob patterns and catastrophic backtracking in glob expressions, respectively. CVE-2026-27135 is a denial of service in nghttp2 triggered by malformed HTTP/2 frames after session termination. The advisory covers Red Hat Enterprise Linux 9.6 Extended Update Support and provides updated packages to fix these issues. The vulnerabilities are rated as having a high severity impact.
Potential Impact
The vulnerabilities can cause denial of service conditions in affected Node.js environments, potentially disrupting network applications that rely on Node.js 20. The issues stem from crafted inputs that trigger resource exhaustion or improper handling of protocol frames, leading to service unavailability. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released updated Node.js 20 packages (version 20.20.2 and later) that address these vulnerabilities. Users running affected versions (>=20.0.0 <20.20.2) on Red Hat Enterprise Linux 9.6 Extended Update Support should apply the available security update promptly. Detailed update instructions are available in the Red Hat advisory at https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the official update.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:9874
- Cve Count
- 4
- Additional Cves
- ["CVE-2026-26996","CVE-2026-27135","CVE-2026-27904"]
- Cvss Version
- 3.0
- State
- PUBLISHED
Threat ID: 6a160989e29bf47b50653348
Added to database: 05/26/2026, 20:58:49 UTC
Last enriched: 08/10/2026, 20:26:28 UTC
Last updated: 09/10/2026, 22:04:10 UTC
Views: 113
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