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alsa-2026:7675
Vulnerability from osv_almalinux
Published
2026-04-13 00:00
Modified
2026-04-14 13:07
Summary
Important: nodejs24 security update
Details
Node.js is a platform built on Chrome's JavaScript runtime for easily building fast, scalable network applications. Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient, perfect for data-intensive real-time applications that run across distributed devices.
Security Fix(es):
- nodejs: Nodejs denial of service (CVE-2026-21637)
- brace-expansion: brace-expansion: Denial of Service via unbounded brace range expansion (CVE-2026-25547)
- 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.
References
{
"affected": [
{
"package": {
"ecosystem": "AlmaLinux:10",
"name": "nodejs24"
},
"ranges": [
{
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},
{
"fixed": "1:24.14.1-2.el10_1"
}
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"type": "ECOSYSTEM"
}
]
},
{
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"name": "nodejs24-devel"
},
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},
{
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},
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{
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},
{
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{
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"name": "nodejs24-libs"
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{
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}
],
"details": "Node.js is a platform built on Chrome\u0027s JavaScript runtime for easily building fast, scalable network applications. Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient, perfect for data-intensive real-time applications that run across distributed devices. \n\nSecurity Fix(es): \n\n * nodejs: Nodejs denial of service (CVE-2026-21637)\n * brace-expansion: brace-expansion: Denial of Service via unbounded brace range expansion (CVE-2026-25547)\n * minimatch: minimatch: Denial of Service via specially crafted glob patterns (CVE-2026-26996)\n * undici: Undici: Denial of Service due to uncontrolled resource consumption (CVE-2026-2581)\n * undici: Undici: HTTP header injection and request smuggling vulnerability (CVE-2026-1527)\n * undici: undici: Denial of Service via unbounded memory consumption during WebSocket permessage-deflate decompression (CVE-2026-1526)\n * undici: Undici: Denial of Service via invalid WebSocket permessage-deflate extension parameter (CVE-2026-2229)\n * undici: Undici: HTTP Request Smuggling and Denial of Service due to duplicate Content-Length headers (CVE-2026-1525)\n * undici: undici: Denial of Service via crafted WebSocket frame with large length (CVE-2026-1528)\n * nghttp2: nghttp2: Denial of Service via malformed HTTP/2 frames after session termination (CVE-2026-27135)\n * Node.js: Node.js: Denial of Service via malformed Internationalized Domain Name processing (CVE-2026-21712)\n * Node.js: Node.js: Denial of Service due to crafted HTTP `__proto__` header (CVE-2026-21710)\n * Node.js: Node.js: Information disclosure due to `fs.realpathSync.native()` bypassing filesystem read restrictions (CVE-2026-21715)\n * nodejs: Node.js: Permission bypass allows unauthorized modification of file permissions and ownership via incomplete security fix. (CVE-2026-21716)\n * Node.js: Node.js: Unauthorized inter-process communication due to missing Unix Domain Socket permission checks (CVE-2026-21711)\n * Node.js: Node.js: Information disclosure via timing oracle in HMAC verification (CVE-2026-21713)\n * Node.js: Node.js: Memory leak and Denial of Service via crafted HTTP/2 WINDOW_UPDATE frames (CVE-2026-21714)\n * nodejs: v8: Node.js: Denial of Service via V8 string hashing mechanism due to predictable hash collisions (CVE-2026-21717)\n\n\nFor 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.\n",
"id": "ALSA-2026:7675",
"modified": "2026-04-14T13:07:01Z",
"published": "2026-04-13T00:00:00Z",
"references": [
{
"type": "ADVISORY",
"url": "https://access.redhat.com/errata/RHSA-2026:7675"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-1525"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-1526"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-1527"
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{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-1528"
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"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-21637"
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{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-21710"
},
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"url": "https://access.redhat.com/security/cve/CVE-2026-21711"
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{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-21712"
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"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-21713"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-21714"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-21715"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-21716"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-21717"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-2229"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-25547"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-2581"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-26996"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-27135"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2431340"
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{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2436942"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2441268"
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{
"type": "REPORT",
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{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2447141"
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"type": "REPORT",
"url": "https://bugzilla.redhat.com/2447142"
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"url": "https://bugzilla.redhat.com/2447143"
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{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2447144"
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{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2447145"
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{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2448754"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2453037"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2453151"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2453152"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2453157"
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{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2453158"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2453160"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2453161"
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{
"type": "REPORT",
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"related": [
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"CVE-2026-25547",
"CVE-2026-26996",
"CVE-2026-2581",
"CVE-2026-1527",
"CVE-2026-1526",
"CVE-2026-2229",
"CVE-2026-1525",
"CVE-2026-1528",
"CVE-2026-27135",
"CVE-2026-21712",
"CVE-2026-21710",
"CVE-2026-21715",
"CVE-2026-21716",
"CVE-2026-21711",
"CVE-2026-21713",
"CVE-2026-21714",
"CVE-2026-21717"
],
"summary": "Important: nodejs24 security update"
}
CVE-2026-26996 (GCVE-0-2026-26996)
Vulnerability from cvelistv5 – Published: 2026-02-20 03:05 – Updated: 2026-02-20 15:34
VLAI?
EPSS
Title
minimatch has a ReDoS via repeated wildcards with non-matching literal in pattern
Summary
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 by a literal character that doesn't appear in the test string. Each * compiles to a separate [^/]*? regex group, and when the match fails, V8's regex engine backtracks exponentially across all possible splits. The time complexity is O(4^N) where N is the number of * characters. With N=15, a single minimatch() call takes ~2 seconds. With N=34, it hangs effectively forever. Any application that passes user-controlled strings to minimatch() as the pattern argument is vulnerable to DoS. This issue has been fixed in version 10.2.1.
Severity ?
CWE
- CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
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CVE-2026-25547 (GCVE-0-2026-25547)
Vulnerability from cvelistv5 – Published: 2026-02-04 21:51 – Updated: 2026-02-05 14:31
VLAI?
EPSS
Title
Uncontrolled Resource Consumption in @isaacs/brace-expansion
Summary
@isaacs/brace-expansion is a hybrid CJS/ESM TypeScript fork of brace-expansion. Prior to version 5.0.1, @isaacs/brace-expansion is vulnerable to a denial of service (DoS) issue caused by unbounded brace range expansion. When an attacker provides a pattern containing repeated numeric brace ranges, the library attempts to eagerly generate every possible combination synchronously. Because the expansion grows exponentially, even a small input can consume excessive CPU and memory and may crash the Node.js process. This issue has been patched in version 5.0.1.
Severity ?
CWE
- CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| isaacs | brace-expansion |
Affected:
< 5.0.1
|
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CVE-2026-21714 (GCVE-0-2026-21714)
Vulnerability from cvelistv5 – Published: 2026-03-30 19:07 – Updated: 2026-03-31 18:05
VLAI?
EPSS
Summary
A memory leak occurs in Node.js HTTP/2 servers when a client sends WINDOW_UPDATE frames on stream 0 (connection-level) that cause the flow control window to exceed the maximum value of 2³¹-1. The server correctly sends a GOAWAY frame, but the Http2Session object is never cleaned up.
This vulnerability affects HTTP2 users on Node.js 20, 22, 24 and 25.
Severity ?
5.3 (Medium)
CWE
- CWE-401 - Missing Release of Memory after Effective Lifetime
Assigner
References
Impacted products
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CVE-2026-21712 (GCVE-0-2026-21712)
Vulnerability from cvelistv5 – Published: 2026-03-30 15:13 – Updated: 2026-03-30 15:52
VLAI?
EPSS
Summary
A flaw in Node.js URL processing causes an assertion failure in native code when `url.format()` is called with a malformed internationalized domain name (IDN) containing invalid characters, crashing the Node.js process.
Severity ?
5.7 (Medium)
Assigner
References
Impacted products
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CVE-2026-21637 (GCVE-0-2026-21637)
Vulnerability from cvelistv5 – Published: 2026-01-20 20:41 – Updated: 2026-01-21 20:22
VLAI?
EPSS
Summary
A flaw in Node.js TLS error handling allows remote attackers to crash or exhaust resources of a TLS server when `pskCallback` or `ALPNCallback` are in use. Synchronous exceptions thrown during these callbacks bypass standard TLS error handling paths (tlsClientError and error), causing either immediate process termination or silent file descriptor leaks that eventually lead to denial of service. Because these callbacks process attacker-controlled input during the TLS handshake, a remote client can repeatedly trigger the issue. This vulnerability affects TLS servers using PSK or ALPN callbacks across Node.js versions where these callbacks throw without being safely wrapped.
Severity ?
5.9 (Medium)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| nodejs | node |
Affected:
20.19.6 , ≤ 20.19.6
(semver)
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CVE-2026-21710 (GCVE-0-2026-21710)
Vulnerability from cvelistv5 – Published: 2026-03-30 19:07 – Updated: 2026-03-31 13:55
VLAI?
EPSS
Summary
A flaw in Node.js HTTP request handling causes an uncaught `TypeError` when a request is received with a header named `__proto__` and the application accesses `req.headersDistinct`.
When this occurs, `dest["__proto__"]` resolves to `Object.prototype` rather than `undefined`, causing `.push()` to be called on a non-array. This exception is thrown synchronously inside a property getter and cannot be intercepted by `error` event listeners, meaning it cannot be handled without wrapping every `req.headersDistinct` access in a `try/catch`.
* This vulnerability affects all Node.js HTTP servers on **20.x, 22.x, 24.x, and v25.x**
Severity ?
7.5 (High)
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| nodejs | node |
Affected:
20.20.1 , ≤ 20.20.1
(semver)
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CVE-2026-1528 (GCVE-0-2026-1528)
Vulnerability from cvelistv5 – Published: 2026-03-12 20:21 – Updated: 2026-03-13 13:04
VLAI?
EPSS
Title
undici is vulnerable to Malicious WebSocket 64-bit length overflows undici parser and crashes the client
Summary
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 the undici version v7.24.0 and v6.24.0. Users should upgrade to this version or later.
Severity ?
7.5 (High)
Assigner
References
Impacted products
Credits
Matteo Collina
Ulises Gascón
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CVE-2026-27135 (GCVE-0-2026-27135)
Vulnerability from cvelistv5 – Published: 2026-03-18 17:59 – Updated: 2026-03-20 21:07
VLAI?
EPSS
Title
nghttp2 Denial of service: Assertion failure due to the missing state validation
Summary
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` is called by the application. They might be called internally by the library when it detects the situation that is subject to connection error. Due to the missing internal state validation, the library keeps reading the rest of the data after one of those APIs is called. Then receiving a malformed frame that causes FRAME_SIZE_ERROR causes assertion failure. nghttp2 v1.68.1 adds missing state validation to avoid assertion failure. No known workarounds are available.
Severity ?
7.5 (High)
CWE
- CWE-617 - Reachable Assertion
Assigner
References
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CVE-2026-21717 (GCVE-0-2026-21717)
Vulnerability from cvelistv5 – Published: 2026-03-30 19:07 – Updated: 2026-03-30 19:46
VLAI?
EPSS
Summary
A flaw in V8's string hashing mechanism causes integer-like strings to be hashed to their numeric value, making hash collisions trivially predictable. By crafting a request that causes many such collisions in V8's internal string table, an attacker can significantly degrade performance of the Node.js process.
The most common trigger is any endpoint that calls `JSON.parse()` on attacker-controlled input, as JSON parsing automatically internalizes short strings into the affected hash table.
This vulnerability affects **20.x, 22.x, 24.x, and 25.x**.
Severity ?
5.9 (Medium)
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| nodejs | node |
Affected:
20.20.1 , ≤ 20.20.1
(semver)
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CVE-2026-2581 (GCVE-0-2026-2581)
Vulnerability from cvelistv5 – Published: 2026-03-12 20:13 – Updated: 2026-03-13 18:04
VLAI?
EPSS
Title
undici is vulnerable to Unbounded Memory Consumption in in Undici's DeduplicationHandler via Response Buffering leads to DoS
Summary
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 for downstream handlers. An attacker-controlled or untrusted upstream endpoint can exploit this with large/chunked responses and concurrent identical requests, causing high memory usage and potential OOM process termination.
Impacted users are applications that use Undici’s deduplication interceptor against endpoints that may produce large or long-lived response bodies.
PatchesThe issue has been patched by changing deduplication behavior to stream response chunks to downstream handlers as they arrive (instead of full-body accumulation), and by preventing late deduplication when body streaming has already started.
Users should upgrade to the first official Undici (and Node.js, where applicable) releases that include this patch.
Severity ?
5.9 (Medium)
CWE
- CWE-770 - Allocation of resources without limits or throttling
Assigner
References
Impacted products
Credits
Matteo Collina
Ulises Gascón
Adnan Jakati
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CVE-2026-21711 (GCVE-0-2026-21711)
Vulnerability from cvelistv5 – Published: 2026-03-30 19:07 – Updated: 2026-04-01 15:03
VLAI?
EPSS
Summary
A flaw in Node.js Permission Model network enforcement leaves Unix Domain Socket (UDS) server operations without the required permission checks, while all comparable network paths correctly enforce them.
As a result, code running under `--permission` without `--allow-net` can create and expose local IPC endpoints, allowing communication with other processes on the same host outside of the intended network restriction boundary.
This vulnerability affects Node.js **25.x** processes using the Permission Model where `--allow-net` is intentionally omitted to restrict network access. Note that `--allow-net` is currently an experimental feature.
Severity ?
5.3 (Medium)
CWE
- CWE-284 - Improper Access Control
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| nodejs | node |
Affected:
25.8.1 , ≤ 25.8.1
(semver)
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CVE-2026-21715 (GCVE-0-2026-21715)
Vulnerability from cvelistv5 – Published: 2026-03-30 19:07 – Updated: 2026-04-01 15:02
VLAI?
EPSS
Summary
A flaw in Node.js Permission Model filesystem enforcement leaves `fs.realpathSync.native()` without the required read permission checks, while all comparable filesystem functions correctly enforce them.
As a result, code running under `--permission` with restricted `--allow-fs-read` can still use `fs.realpathSync.native()` to check file existence, resolve symlink targets, and enumerate filesystem paths outside of permitted directories.
This vulnerability affects **20.x, 22.x, 24.x, and 25.x** processes using the Permission Model where `--allow-fs-read` is intentionally restricted.
Severity ?
CWE
- CWE-732 - Incorrect Permission Assignment for Critical Resource
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| nodejs | node |
Affected:
20.20.1 , ≤ 20.20.1
(semver)
Affected: 22.22.1 , ≤ 22.22.1 (semver) Affected: 24.14.0 , ≤ 24.14.0 (semver) Affected: 25.8.1 , ≤ 25.8.1 (semver) Affected: 4.0 , < 4.* (semver) Affected: 5.0 , < 5.* (semver) Affected: 6.0 , < 6.* (semver) Affected: 7.0 , < 7.* (semver) Affected: 8.0 , < 8.* (semver) Affected: 9.0 , < 9.* (semver) Affected: 10.0 , < 10.* (semver) Affected: 11.0 , < 11.* (semver) Affected: 12.0 , < 12.* (semver) Affected: 13.0 , < 13.* (semver) Affected: 14.0 , < 14.* (semver) Affected: 15.0 , < 15.* (semver) Affected: 16.0 , < 16.* (semver) Affected: 17.0 , < 17.* (semver) Affected: 18.0 , < 18.* (semver) Affected: 19.0 , < 19.* (semver) |
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CVE-2026-21716 (GCVE-0-2026-21716)
Vulnerability from cvelistv5 – Published: 2026-03-30 19:07 – Updated: 2026-03-31 14:27
VLAI?
EPSS
Summary
An incomplete fix for CVE-2024-36137 leaves `FileHandle.chmod()` and `FileHandle.chown()` in the promises API without the required permission checks, while their callback-based equivalents (`fs.fchmod()`, `fs.fchown()`) were correctly patched.
As a result, code running under `--permission` with restricted `--allow-fs-write` can still use promise-based `FileHandle` methods to modify file permissions and ownership on already-open file descriptors, bypassing the intended write restrictions.
This vulnerability affects **20.x, 22.x, 24.x, and 25.x** processes using the Permission Model where `--allow-fs-write` is intentionally restricted.
Severity ?
CWE
- CWE-862 - Missing Authorization
Assigner
References
Impacted products
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CVE-2026-1527 (GCVE-0-2026-1527)
Vulnerability from cvelistv5 – Published: 2026-03-12 20:17 – Updated: 2026-03-13 18:06
VLAI?
EPSS
Title
undici is vulnerable to CRLF Injection via upgrade option
Summary
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 services (Redis, Memcached, Elasticsearch)
The vulnerability exists because undici writes the upgrade value directly to the socket without validating for invalid header characters:
// lib/dispatcher/client-h1.js:1121
if (upgrade) {
header += `connection: upgrade\r\nupgrade: ${upgrade}\r\n`
}
Severity ?
4.6 (Medium)
CWE
- CWE-93 - Improper neutralization of CRLF sequences ('CRLF injection')
Assigner
References
Impacted products
Credits
Matteo Collina
Ulises Gascón
Raul Vega del Valle
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CVE-2026-1526 (GCVE-0-2026-1526)
Vulnerability from cvelistv5 – Published: 2026-03-12 20:08 – Updated: 2026-03-13 18:04
VLAI?
EPSS
Title
undici is vulnerable to Unbounded Memory Consumption in undici WebSocket permessage-deflate Decompression
Summary
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 compressed frames without enforcing any limit on the decompressed data size. A malicious WebSocket server can send a small compressed frame (a "decompression bomb") that expands to an extremely large size in memory, causing the Node.js process to exhaust available memory and crash or become unresponsive.
The vulnerability exists in the PerMessageDeflate.decompress() method, which accumulates all decompressed chunks in memory and concatenates them into a single Buffer without checking whether the total size exceeds a safe threshold.
Severity ?
7.5 (High)
CWE
- CWE-409 - Improper handling of highly compressed data (data amplification)
Assigner
References
Impacted products
Credits
Matteo Collina
Ulises Gascón
HO9
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CVE-2026-2229 (GCVE-0-2026-2229)
Vulnerability from cvelistv5 – Published: 2026-03-12 20:27 – Updated: 2026-03-13 13:06
VLAI?
EPSS
Title
undici is vulnerable to Unhandled Exception in undici WebSocket Client Due to Invalid server_max_window_bits Validation
Summary
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 support for permessage-deflate compression. A malicious server can respond with an out-of-range server_max_window_bits value (outside zlib's valid range of 8-15). When the server subsequently sends a compressed frame, the client attempts to create a zlib InflateRaw instance with the invalid windowBits value, causing a synchronous RangeError exception that is not caught, resulting in immediate process termination.
The vulnerability exists because:
* The isValidClientWindowBits() function only validates that the value contains ASCII digits, not that it falls within the valid range 8-15
* The createInflateRaw() call is not wrapped in a try-catch block
* The resulting exception propagates up through the call stack and crashes the Node.js process
Severity ?
7.5 (High)
Assigner
References
Impacted products
Credits
Matteo Collina
Ulises Gascón
Rafael Gonzaga
Ethan Arrowood
Aisle Research
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CVE-2026-1525 (GCVE-0-2026-1525)
Vulnerability from cvelistv5 – Published: 2026-03-12 19:56 – Updated: 2026-03-12 20:46
VLAI?
EPSS
Title
undici is vulnerable to Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Summary
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.
Who is impacted:
* Applications using undici.request(), undici.Client, or similar low-level APIs with headers passed as flat arrays
* Applications that accept user-controlled header names without case-normalization
Potential consequences:
* Denial of Service: Strict HTTP parsers (proxies, servers) will reject requests with duplicate Content-Length headers (400 Bad Request)
* HTTP Request Smuggling: In deployments where an intermediary and backend interpret duplicate headers inconsistently (e.g., one uses the first value, the other uses the last), this can enable request smuggling attacks leading to ACL bypass, cache poisoning, or credential hijacking
Severity ?
6.5 (Medium)
CWE
- CWE-444 - Inconsistent interpretation of HTTP requests ('HTTP Request/Response smuggling')
Assigner
References
Impacted products
Credits
Matteo Collina
Ulises Gascón
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CVE-2026-21713 (GCVE-0-2026-21713)
Vulnerability from cvelistv5 – Published: 2026-03-30 19:07 – Updated: 2026-03-30 19:45
VLAI?
EPSS
Summary
A flaw in Node.js HMAC verification uses a non-constant-time comparison when validating user-provided signatures, potentially leaking timing information proportional to the number of matching bytes. Under certain threat models where high-resolution timing measurements are possible, this behavior could be exploited as a timing oracle to infer HMAC values.
Node.js already provides timing-safe comparison primitives used elsewhere in the codebase, indicating this is an oversight rather than an intentional design decision.
This vulnerability affects **20.x, 22.x, 24.x, and 25.x**.
Severity ?
5.9 (Medium)
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| nodejs | node |
Affected:
20.20.1 , ≤ 20.20.1
(semver)
Affected: 22.22.1 , ≤ 22.22.1 (semver) Affected: 24.14.0 , ≤ 24.14.0 (semver) Affected: 25.8.1 , ≤ 25.8.1 (semver) Affected: 4.0 , < 4.* (semver) Affected: 5.0 , < 5.* (semver) Affected: 6.0 , < 6.* (semver) Affected: 7.0 , < 7.* (semver) Affected: 8.0 , < 8.* (semver) Affected: 9.0 , < 9.* (semver) Affected: 10.0 , < 10.* (semver) Affected: 11.0 , < 11.* (semver) Affected: 12.0 , < 12.* (semver) Affected: 13.0 , < 13.* (semver) Affected: 14.0 , < 14.* (semver) Affected: 15.0 , < 15.* (semver) Affected: 16.0 , < 16.* (semver) Affected: 17.0 , < 17.* (semver) Affected: 18.0 , < 18.* (semver) Affected: 19.0 , < 19.* (semver) |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-21713",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-03-30T19:45:13.027379Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-03-30T19:45:22.905Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "node",
"vendor": "nodejs",
"versions": [
{
"lessThanOrEqual": "20.20.1",
"status": "affected",
"version": "20.20.1",
"versionType": "semver"
},
{
"lessThanOrEqual": "22.22.1",
"status": "affected",
"version": "22.22.1",
"versionType": "semver"
},
{
"lessThanOrEqual": "24.14.0",
"status": "affected",
"version": "24.14.0",
"versionType": "semver"
},
{
"lessThanOrEqual": "25.8.1",
"status": "affected",
"version": "25.8.1",
"versionType": "semver"
},
{
"lessThan": "4.*",
"status": "affected",
"version": "4.0",
"versionType": "semver"
},
{
"lessThan": "5.*",
"status": "affected",
"version": "5.0",
"versionType": "semver"
},
{
"lessThan": "6.*",
"status": "affected",
"version": "6.0",
"versionType": "semver"
},
{
"lessThan": "7.*",
"status": "affected",
"version": "7.0",
"versionType": "semver"
},
{
"lessThan": "8.*",
"status": "affected",
"version": "8.0",
"versionType": "semver"
},
{
"lessThan": "9.*",
"status": "affected",
"version": "9.0",
"versionType": "semver"
},
{
"lessThan": "10.*",
"status": "affected",
"version": "10.0",
"versionType": "semver"
},
{
"lessThan": "11.*",
"status": "affected",
"version": "11.0",
"versionType": "semver"
},
{
"lessThan": "12.*",
"status": "affected",
"version": "12.0",
"versionType": "semver"
},
{
"lessThan": "13.*",
"status": "affected",
"version": "13.0",
"versionType": "semver"
},
{
"lessThan": "14.*",
"status": "affected",
"version": "14.0",
"versionType": "semver"
},
{
"lessThan": "15.*",
"status": "affected",
"version": "15.0",
"versionType": "semver"
},
{
"lessThan": "16.*",
"status": "affected",
"version": "16.0",
"versionType": "semver"
},
{
"lessThan": "17.*",
"status": "affected",
"version": "17.0",
"versionType": "semver"
},
{
"lessThan": "18.*",
"status": "affected",
"version": "18.0",
"versionType": "semver"
},
{
"lessThan": "19.*",
"status": "affected",
"version": "19.0",
"versionType": "semver"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A flaw in Node.js HMAC verification uses a non-constant-time comparison when validating user-provided signatures, potentially leaking timing information proportional to the number of matching bytes. Under certain threat models where high-resolution timing measurements are possible, this behavior could be exploited as a timing oracle to infer HMAC values.\r\n\r\nNode.js already provides timing-safe comparison primitives used elsewhere in the codebase, indicating this is an oversight rather than an intentional design decision.\r\n\r\nThis vulnerability affects **20.x, 22.x, 24.x, and 25.x**."
}
],
"metrics": [
{
"cvssV3_0": {
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"version": "3.0"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-03-30T19:07:28.356Z",
"orgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
"shortName": "hackerone"
},
"references": [
{
"url": "https://nodejs.org/en/blog/vulnerability/march-2026-security-releases"
}
]
}
},
"cveMetadata": {
"assignerOrgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
"assignerShortName": "hackerone",
"cveId": "CVE-2026-21713",
"datePublished": "2026-03-30T19:07:28.356Z",
"dateReserved": "2026-01-04T15:00:06.574Z",
"dateUpdated": "2026-03-30T19:45:22.905Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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