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8.1Hoch

CVE-2026-33940Handlebars.js has JavaScript Injection via AST Type Confusion when passing an object as dynamic partial

handlebars-lang handlebars.js; Red Hat Cluster Observability Operator 1.5.0; Red Hat Red Hat OpenShift Dev Spaces 3.27; Red Hat Cryostat 4 Veröffentlicht: (vor 7 Monaten)

Beschreibung

Handlebars provides the power necessary to let users build semantic templates. In versions 4.0.0 through 4.7.8, a crafted object placed in the template context can bypass all conditional guards in `resolvePartial()` and cause `invokePartial()` to return `undefined`. The Handlebars runtime then treats the unresolved partial as a source that needs to be compiled, passing the crafted object to `env.compile()`. Because the object is a valid Handlebars AST containing injected code, the generated JavaScript executes arbitrary commands on the server. The attack requires the adversary to control a value that can be returned by a dynamic partial lookup. Version 4.7.9 fixes the issue. Some workarounds are available. First, use the runtime-only build (`require('handlebars/runtime')`). Without `compile()`, the fallback compilation path in `invokePartial` is unreachable. Second, sanitize context data before rendering: Ensure no value in the context is a non-primitive object that could be passed to a dynamic partial. Third, avoid dynamic partial lookups (`{{> (lookup ...)}}`) when context data is user-controlled.

Schwachstellentyp (CWE): CWE-94CWE-843

Daten: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Wiedergegeben wie in der Quelle, auf Englisch.

Betroffene Produkte und Versionen

HerstellerProduktVersionen
cluster observability operator 1.5 —
handlebars-lang handlebars.js >= 4.0.0, < 4.7.9
handlebarsjs handlebars 4.0.0 – < 4.7.9
openshift devspaces 3.27 —
Red Hat Cluster Observability Operator 1.5.0 all versions
Red Hat Cryostat 4 —
Red Hat Logging Subsystem for Red Hat OpenShift all versions
Red Hat Red Hat Data Grid 8 —
Red Hat Red Hat Enterprise Linux 10 all versions
Red Hat Red Hat Enterprise Linux 7 —
Red Hat Red Hat Enterprise Linux 8 all versions
Red Hat Red Hat Enterprise Linux 9 all versions
Red Hat Red Hat OpenShift AI (RHOAI) —
Red Hat Red Hat OpenShift Dev Spaces 3.27 all versions
Red Hat Red Hat Process Automation 7 —

Referenzen und Patches

CPE-Treffer (NVD) (1)
  • cpe:2.3:a:handlebarsjs:handlebars:*:*:*:*:*:node.js:*:* ≥ 4.0.0 < 4.7.9

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