Handlebars provides the power necessary to let users build semantic templates. In versions 4.0.0 through 4.7.8, `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 execute arbitrary JavaScript, leading to Remote Code Execution on the server. Version 4.7.9 fixes the issue. Some workarounds are available. Validate input type before calling `Handlebars.compile()`; ensure the argument is always a `string`, never a plain object or JSON-deserialized value. Use the Handlebars runtime-only build (`handlebars/runtime`) on the server if templates are pre-compiled at build time; `compile()` will be unavailable.
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
| Vendor | Product | Versions | |
|---|---|---|---|
| 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 Developer Hub | all versions | |
| 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 | — | |
| Red Hat | Red Hat OpenShift Dev Spaces 3.27 | all versions | |
| Red Hat | Red Hat Process Automation 7 | — |
cpe:2.3:a:handlebarsjs:handlebars:*:*:*:*:*:node.js:*:* ≥ 4.0.0 < 4.7.9Our free, open-source honeypot sensor waits on ports your server does not use and reports the scanners and attackers that connect to a shared blocklist.