Improper Check for Unusual or Exceptional Conditions

Overview handlebars is an extension to the Mustache templating language. Affected versions of this package are vulnerable to Improper Check for Unusual or Exceptional Conditions through the registerDecorator path in lib/handlebars/compiler/javascript-compiler.js. An attacker can crash the Node.js...

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 ...

Handlebars.js has JavaScript Injection via AST Type Confusion by tampering @partial-block

Summary The @partial-block special variable is stored in the template data context and is reachable and mutable from within a template via helpers that accept arbitrary objects. When a helper overwrites @partial-block with a crafted Handlebars AST, a subsequent invocation of @partial-block compil...

Access of Resource Using Incompatible Type ('Type Confusion')

Overview handlebars is an extension to the Mustache templating language. Affected versions of this package are vulnerable to Access of Resource Using Incompatible Type 'Type Confusion' via manipulation of the @partial-block variable in the template data context. An attacker can execute arbitrary...

Access of Resource Using Incompatible Type ('Type Confusion')

Overview org.webjars.npm:handlebars is an extension to the Mustache templating language. Affected versions of this package are vulnerable to Access of Resource Using Incompatible Type 'Type Confusion' via manipulation of the @partial-block variable in the template data context. An attacker can...

GHSA-3MFM-83XF-C92R Handlebars.js has JavaScript Injection via AST Type Confusion by tampering @partial-block

Summary The @partial-block special variable is stored in the template data context and is reachable and mutable from within a template via helpers that accept arbitrary objects. When a helper overwrites @partial-block with a crafted Handlebars AST, a subsequent invocation of @partial-block compil...

4coders-commons (>=0.0.1, <=0.0.2), @11ty/eleventy (0.3.3) +3662 more potentially affected by CVE-2026-33938 via handlebars (>=4.0.0, <=4.7.8)

handlebars NPM version =4.0.0, =0.0.1, =0.1.0, =0.1.0, =0.0.11, =0.0.52, =0.1.0, =0.0.72, =0.1.0, =1.1.1-pr-7-1d68cf28da, =0.0.0-13d458778df8db161111e788ed4207a13a110724, =1.16.0, =1.16.0, =1.16.0, =2.4.4 and more Source cves: CVE-2026-33938 Source advisory: SNYK:JS-HANDLEBARS-15803082...

4coders-commons (>=0.0.1, <=0.0.2), @11ty/eleventy (0.3.3) +3662 more potentially affected by CVE-2026-33938 via handlebars (>=4.0.0, <=4.7.8)

handlebars NPM version =4.0.0, =0.0.1, =0.1.0, =0.1.0, =0.0.11, =0.0.52, =0.1.0, =0.0.72, =0.1.0, =1.1.1-pr-7-1d68cf28da, =0.0.0-13d458778df8db161111e788ed4207a13a110724, =1.16.0, =1.16.0, =1.16.0, =2.4.4 and more Source cves: CVE-2026-33938 Source advisory: OSV:GHSA-3MFM-83XF-C92R...

4coders-commons (>=0.0.1, <=0.0.2), @11ty/eleventy (0.3.3) +3662 more potentially affected by CVE-2026-33937 via handlebars (>=4.0.0, <=4.7.8)

handlebars NPM version =4.0.0, =0.0.1, =0.1.0, =0.1.0, =0.0.11, =0.0.52, =0.1.0, =0.0.72, =0.1.0, =1.1.1-pr-7-1d68cf28da, =0.0.0-13d458778df8db161111e788ed4207a13a110724, =1.16.0, =1.16.0, =1.16.0, =2.4.4 and more Source cves: CVE-2026-33937 Source advisory: OSV:GHSA-2W6W-674Q-4C4Q...

GHSA-2W6W-674Q-4C4Q Handlebars.js has JavaScript Injection via AST Type Confusion

Summary Handlebars.compile accepts a pre-parsed AST object in addition to a template string. The value field of a NumberLiteral AST node is emitted directly into the generated JavaScript without quoting or sanitization. An attacker who can supply a crafted AST to compile can therefore inject and...

Handlebars.js has JavaScript Injection via AST Type Confusion

Summary Handlebars.compile accepts a pre-parsed AST object in addition to a template string. The value field of a NumberLiteral AST node is emitted directly into the generated JavaScript without quoting or sanitization. An attacker who can supply a crafted AST to compile can therefore inject and...

Access of Resource Using Incompatible Type ('Type Confusion')

Overview org.webjars.npm:handlebars is an extension to the Mustache templating language. Affected versions of this package are vulnerable to Access of Resource Using Incompatible Type 'Type Confusion' via the compile function. An attacker can execute arbitrary code by supplying a crafted Abstract...

Access of Resource Using Incompatible Type ('Type Confusion')

Overview handlebars is an extension to the Mustache templating language. Affected versions of this package are vulnerable to Access of Resource Using Incompatible Type 'Type Confusion' via the compile function. An attacker can execute arbitrary code by supplying a crafted Abstract Syntax Tree AST...

4coders-commons (>=0.0.1, <=0.0.2), @11ty/eleventy (0.3.3) +3662 more potentially affected by CVE-2026-33937 via handlebars (>=4.0.0, <=4.7.8)

handlebars NPM version =4.0.0, =0.0.1, =0.1.0, =0.1.0, =0.0.11, =0.0.52, =0.1.0, =0.0.72, =0.1.0, =1.1.1-pr-7-1d68cf28da, =0.0.0-13d458778df8db161111e788ed4207a13a110724, =1.16.0, =1.16.0, =1.16.0, =2.4.4 and more Source cves: CVE-2026-33937 Source advisory: SNYK:JS-HANDLEBARS-15803084...

handlebars 安全漏洞

Handlebars is a semantic web template system. Versions of Handlebars 4.7.8 and earlier contain security vulnerabilities. These vulnerabilities stem from the resolvePartial function, which does not prevent prototype chain traversal. This can lead to prototype pollution, thereby enabling...

handlebars 代码问题漏洞

Handlebars is a semantic web template system. Versions of Handlebars 4.7.8 and earlier have a code vulnerability that arises when templates contain unregistered decorator references, leading to an unhandled TypeError. This can cause Node.js processes to crash, resulting in a denial-of-service...

handlebars 安全漏洞

Handlebars is a semantic web template system. Versions of Handlebars 4.7.8 and earlier contain security vulnerabilities. These vulnerabilities stem from the ability for custom objects to bypass all conditional protections in resolvePartial, allowing attackers to execute arbitrary commands and...

handlebars 安全漏洞

Handlebars is a semantic web template system. Versions of Handlebars 4.7.8 and earlier contain security vulnerabilities. These vulnerabilities stem from the improper handling of the value field in NumberLiteral AST nodes by the Handlebars.compile function. This could allow attackers to inject and...

PT-2026-28572

Name of the Vulnerable Software and Affected Versions Handlebars versions 4.0.0 through 4.7.8 Description Handlebars allows users to build semantic templates. A crafted object placed in the template context can bypass conditional guards in the resolvePartial function, causing invokePartial to...

PT-2026-28570

Name of the Vulnerable Software and Affected Versions Handlebars versions 4.0.0 through 4.7.8 Description Handlebars allows users to build semantic templates. A flaw exists where the @partial-block special variable is stored in the template data context and is mutable from within a template via...