CVE-2026-21713: Observable Timing Discrepancy

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...

Node.js security vulnerabilities

Node.js is an open-source, cross-platform JavaScript runtime environment developed by the Node.js community. Versions 20.x, 22.x, 24.x, and 25.x of Node.js have security vulnerabilities. These vulnerabilities stem from HMAC verification using a comparison that does not maintain constant time, whi...

Node.js security vulnerabilities

Node.js is an open-source, cross-platform JavaScript runtime environment developed by the Node.js community. Security vulnerabilities exist in Node.js versions 20.x, 22.x, 24.x, and 25.x. These vulnerabilities stem from HTTP/2 servers processing WINDOWUPDATE frames that cause the traffic control...

CVE-2026-21715: Incorrect Permission Assignment for Critical Resource

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...

CVE-2026-21714: Missing Release of Memory after Effective Lifetime

A memory leak occurs in Node.js HTTP/2 servers when a client sends WINDOWUPDATE 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 vulnerabili...

DSA-6183-1 nodejs - security update

Bulletin has no description...

CVE-2026-33939

Handlebars provides the power necessary to let users build semantic templates. In versions 4.0.0 through 4.7.8, when a Handlebars template contains decorator syntax referencing an unregistered decorator e.g. n, the compiled template calls lookupPropertydecorators, "n", which returns undefined. Th...

CVE-2026-33941

Handlebars provides the power necessary to let users build semantic templates. In versions 4.0.0 through 4.7.8, the Handlebars CLI precompiler "bin/handlebars" / "lib/precompiler.js" concatenates user-controlled strings — template file names and several CLI options — directly into the JavaScript ...

CVE-2026-33939

Handlebars provides the power necessary to let users build semantic templates. In versions 4.0.0 through 4.7.8, when a Handlebars template contains decorator syntax referencing an unregistered decorator e.g. "n", the compiled template calls "lookupPropertydecorators, "n"", which returns...

Handlebars.js has Denial of Service via Malformed Decorator Syntax in Template Compilation

Summary When a Handlebars template contains decorator syntax referencing an unregistered decorator e.g. n, the compiled template calls lookupPropertydecorators, "n", which returns undefined. The runtime then immediately invokes the result as a function, causing an unhandled TypeError: ... is not ...

GHSA-9CX6-37PM-9JFF Handlebars.js has Denial of Service via Malformed Decorator Syntax in Template Compilation

Summary When a Handlebars template contains decorator syntax referencing an unregistered decorator e.g. n, the compiled template calls lookupPropertydecorators, "n", which returns undefined. The runtime then immediately invokes the result as a function, causing an unhandled TypeError: ... is not ...

CVE-2021-27191

The get-ip-range package before 4.0.0 for Node.js is vulnerable to denial of service DoS if the range is untrusted input. An attacker could send a large range such as 128.0.0.0/1 that causes resource exhaustion...

CVE-2026-33941: Improper Neutralization of Input During Web Page Generation

Handlebars provides the power necessary to let users build semantic templates. In versions 4.0.0 through 4.7.8, the Handlebars CLI precompiler bin/handlebars / lib/precompiler.js concatenates user-controlled strings — template file names and several CLI options — directly into the JavaScript it...

CVE-2026-33939: Improper Check for Unusual or Exceptional Conditions

Handlebars provides the power necessary to let users build semantic templates. In versions 4.0.0 through 4.7.8, when a Handlebars template contains decorator syntax referencing an unregistered decorator e.g. n, the compiled template calls lookupPropertydecorators, "n", which returns undefined. Th...

AZL-81035 CVE-2026-33671 affecting package nodejs24 for versions less than 24.14.1-2

Picomatch is a glob matcher written JavaScript. Versions prior to 4.0.4, 3.0.2, and 2.3.2 are vulnerable to Regular Expression Denial of Service ReDoS when processing crafted extglob patterns. Certain patterns using extglob quantifiers such as + and , especially when combined with overlapping...

CVE-2026-33285

LiquidJS is a Shopify / GitHub Pages compatible template engine in pure JavaScript. Prior to version 10.25.1, LiquidJS's "memoryLimit" security mechanism can be completely bypassed by using reverse range expressions e.g., "100000000..1", allowing an attacker to allocate unlimited memory. Combined...

CVE-2026-33285: Improper Input Validation

LiquidJS is a Shopify / GitHub Pages compatible template engine in pure JavaScript. Prior to version 10.25.1, LiquidJS's memoryLimit security mechanism can be completely bypassed by using reverse range expressions e.g., 100000000..1, allowing an attacker to allocate unlimited memory. Combined wit...

CVE-2026-33732: Use of Incorrectly-Resolved Name or Reference

srvx is a universal server based on web standards. Prior to version 0.11.13, a pathname parsing discrepancy in srvx's FastURL allows middleware bypass on the Node.js adapter when a raw HTTP request uses an absolute URI with a non-standard scheme e.g. file://. Starting in version 0.11.13, the...

CVE-2026-33671: Inefficient Regular Expression Complexity

Picomatch is a glob matcher written JavaScript. Versions prior to 4.0.4, 3.0.2, and 2.3.2 are vulnerable to Regular Expression Denial of Service ReDoS when processing crafted extglob patterns. Certain patterns using extglob quantifiers such as + and , especially when combined with overlapping...

Uncaught Exception

Overview Affected versions of this package are vulnerable to Uncaught Exception in Node.js HTTP request handling. The flaw triggers when an incoming request includes a header named proto and the server application accesses req.headersDistinct. This causes dest"proto" to incorrectly resolve to...