Summary
Node.js is a software development platform for building fast and scalable network applications in the JavaScript programming language.
Security Fix(es):
* nodejs: Nodejs denial of service (CVE-2026-21637)
* minimatch: minimatch: Denial of Service via specially crafted glob patterns (CVE-2026-26996)
* undici: Undici: Denial of Service due to uncontrolled resource consumption (CVE-2026-2581)
* undici: Undici: HTTP header injection and request smuggling vulnerability (CVE-2026-1527)
* undici: undici: Denial of Service via unbounded memory consumption during WebSocket permessage-deflate decompression (CVE-2026-1526)
* undici: Undici: Denial of Service via invalid WebSocket permessage-deflate extension parameter (CVE-2026-2229)
* undici: Undici: HTTP Request Smuggling and Denial of Service due to duplicate Content-Length headers (CVE-2026-1525)
* undici: undici: Denial of Service via crafted WebSocket frame with large length (CVE-2026-1528)
* nghttp2: nghttp2: Denial of Service via malformed HTTP/2 frames after session termination (CVE-2026-27135)
* Node.js: Node.js: Denial of Service via malformed Internationalized Domain Name processing (CVE-2026-21712)
* Node.js: Node.js: Denial of Service due to crafted HTTP `__proto__` header (CVE-2026-21710)
* Node.js: Node.js: Information disclosure due to `fs.realpathSync.native()` bypassing filesystem read restrictions (CVE-2026-21715)
* nodejs: Node.js: Permission bypass allows unauthorized modification of file permissions and ownership via incomplete security fix. (CVE-2026-21716)
* Node.js: Node.js: Unauthorized inter-process communication due to missing Unix Domain Socket permission checks (CVE-2026-21711)
* Node.js: Node.js: Information disclosure via timing oracle in HMAC verification (CVE-2026-21713)
* Node.js: Node.js: Memory leak and Denial of Service via crafted HTTP/2 WINDOW_UPDATE frames (CVE-2026-21714)
* nodejs: v8: Node.js: Denial of Service via V8 string hashing mechanism due to predictable hash collisions (CVE-2026-21717)
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.
Fixed packages 10
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux · 8 | nodejs | 1:24.14.1-2.module_el8.10.0+4160+4819ac42 |
| AlmaLinux · 8 | nodejs-devel | 1:24.14.1-2.module_el8.10.0+4160+4819ac42 |
| AlmaLinux · 8 | nodejs-docs | 1:24.14.1-2.module_el8.10.0+4160+4819ac42 |
| AlmaLinux · 8 | nodejs-full-i18n | 1:24.14.1-2.module_el8.10.0+4160+4819ac42 |
| AlmaLinux · 8 | nodejs-libs | 1:24.14.1-2.module_el8.10.0+4160+4819ac42 |
| AlmaLinux · 8 | nodejs-nodemon | 3.0.3-1.module_el8.10.0+4061+f8ceeab9 |
| AlmaLinux · 8 | nodejs-packaging | 2021.06-6.module_el8.10.0+4086+70facd4a |
| AlmaLinux · 8 | nodejs-packaging-bundler | 2021.06-6.module_el8.10.0+4086+70facd4a |
| AlmaLinux · 8 | npm | 1:11.11.0-1.24.14.1.2.module_el8.10.0+4160+4819ac42 |
| AlmaLinux · 8 | v8-13.6-devel | 3:13.6.233.17-1.24.14.1.2.module_el8.10.0+4160+4819ac42 |
Vulnerabilities 17
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High 8.7
minimatch has a ReDoS via repeated wildcards with non-matching literal in pattern
minimatch is a minimal matching utility for converting glob expressions into JavaScript RegExp objects. Versions 10.2.0 and below are vulnerable to Regular Expression Denial of Service (ReDoS) when a glob pattern contains many consecutive * wildcards followed…
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High 7.5
undici is vulnerable to Unbounded Memory Consumption in undici WebSocket permessage-deflate Decompression
The undici WebSocket client is vulnerable to a denial-of-service attack via unbounded memory consumption during permessage-deflate decompression. When a WebSocket connection negotiates the permessage-deflate extension, the client decompresses incoming compres…
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High 7.5
undici is vulnerable to Malicious WebSocket 64-bit length overflows undici parser and crashes the client
ImpactA server can reply with a WebSocket frame using the 64-bit length form and an extremely large length. undici's ByteParser overflows internal math, ends up in an invalid state, and throws a fatal TypeError that terminates the process. Patches Patched in …
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High 7.5
A flaw in Node.js HTTP request handling causes an uncaught `TypeError` when a request is received with a header named `…
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High 7.5
undici is vulnerable to Unhandled Exception in undici WebSocket Client Due to Invalid server_max_window_bits Validation
ImpactThe undici WebSocket client is vulnerable to a denial-of-service attack due to improper validation of the server_max_window_bits parameter in the permessage-deflate extension. When a WebSocket client connects to a server, it automatically advertises sup…
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High 7.5
nghttp2 Denial of service: Assertion failure due to the missing state validation
nghttp2 is an implementation of the Hypertext Transfer Protocol version 2 in C. Prior to version 1.68.1, the nghttp2 library stops reading the incoming data when user facing public API `nghttp2_session_terminate_session` or `nghttp2_session_terminate_session2…
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Medium 6.5
undici is vulnerable to Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Undici allows duplicate HTTP Content-Length headers when they are provided in an array with case-variant names (e.g., Content-Length and content-length). This produces malformed HTTP/1.1 requests with multiple conflicting Content-Length values on the wire. Wh…
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Medium 5.9
A flaw in Node.js TLS error handling allows remote attackers to crash or exhaust resources of a TLS server when `pskCal…
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Medium 5.9
A flaw in Node.js HMAC verification uses a non-constant-time comparison when validating user-provided signatures, poten…
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Medium 5.9CVE-2026-21717 Public exploit
A flaw in V8's string hashing mechanism causes integer-like strings to be hashed to their numeric value, making hash co…
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Medium 5.9
undici is vulnerable to Unbounded Memory Consumption in in Undici's DeduplicationHandler via Response Buffering leads to DoS
This is an uncontrolled resource consumption vulnerability (CWE-400) that can lead to Denial of Service (DoS). In vulnerable Undici versions, when interceptors.deduplicate() is enabled, response data for deduplicated requests could be accumulated in memory fo…
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Medium 5.7
A flaw in Node.js URL processing causes an assertion failure in native code when `url.format()` is called with a malfor…
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Medium 5.3
A flaw in Node.js Permission Model network enforcement leaves Unix Domain Socket (UDS) server operations without the re…
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Medium 5.3
A memory leak occurs in Node.js HTTP/2 servers when a client sends WINDOW_UPDATE frames on stream 0 (connection-level) …
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Medium 4.6
undici is vulnerable to CRLF Injection via upgrade option
ImpactWhen an application passes user-controlled input to the upgrade option of client.request(), an attacker can inject CRLF sequences (\r\n) to: * Inject arbitrary HTTP headers * Terminate the HTTP request prematurely and smuggle raw data to non-HTTP servic…
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Low 3.3
A flaw in Node.js Permission Model filesystem enforcement leaves `fs.realpathSync.native()` without the required read p…
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Low 3.3
An incomplete fix for CVE-2024-36137 leaves `FileHandle.chmod()` and `FileHandle.chown()` in the promises API without t…
References
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report
https://access.redhat.com/security/cve/CVE-2026-1525
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report
https://access.redhat.com/security/cve/CVE-2026-1526
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report
https://access.redhat.com/security/cve/CVE-2026-1527
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report
https://access.redhat.com/security/cve/CVE-2026-1528
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report
https://access.redhat.com/security/cve/CVE-2026-21637
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report
https://access.redhat.com/security/cve/CVE-2026-21710
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report
https://access.redhat.com/security/cve/CVE-2026-21711
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report
https://access.redhat.com/security/cve/CVE-2026-21712
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report
https://access.redhat.com/security/cve/CVE-2026-21713
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report
https://access.redhat.com/security/cve/CVE-2026-21714
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report
https://access.redhat.com/security/cve/CVE-2026-21715
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report
https://access.redhat.com/security/cve/CVE-2026-21716
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report
https://access.redhat.com/security/cve/CVE-2026-21717
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report
https://access.redhat.com/security/cve/CVE-2026-2229
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report
https://access.redhat.com/security/cve/CVE-2026-2581
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report
https://access.redhat.com/security/cve/CVE-2026-26996
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report
https://access.redhat.com/security/cve/CVE-2026-27135
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report
https://bugzilla.redhat.com/2431340
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report
https://bugzilla.redhat.com/2441268
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report
https://bugzilla.redhat.com/2447140
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report
https://bugzilla.redhat.com/2447141
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report
https://bugzilla.redhat.com/2447142
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report
https://bugzilla.redhat.com/2447143
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report
https://bugzilla.redhat.com/2447144
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report
https://bugzilla.redhat.com/2447145
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report
https://bugzilla.redhat.com/2448754
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report
https://bugzilla.redhat.com/2453037
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report
https://bugzilla.redhat.com/2453151
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report
https://bugzilla.redhat.com/2453152
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report
https://bugzilla.redhat.com/2453157
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report
https://bugzilla.redhat.com/2453158
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report
https://bugzilla.redhat.com/2453160
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report
https://bugzilla.redhat.com/2453161
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report
https://bugzilla.redhat.com/2453162
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advisory
https://errata.almalinux.org/8/ALSA-2026-7670.html