CVE detail
CVE-2026-33943
Happy DOM is a JavaScript implementation of a web browser without its graphical user interface. In versions 15.10.0 through 20.8.7, a code injection vulnerability in `ECMAScriptModuleCompiler` allows an attacker to achieve Remote Code Execution (RCE) by injecting arbitrary JavaScript expressions inside `export { }` declarations in ES module scripts processed by happy-dom. The compiler directly interpolates unsanitized content into generated code as an executable expression, and the quote filter does not strip backticks, allowing template literal-based payloads to bypass sanitization. Version 20.8.8 fixes the issue.
Buzz score
Why this CVE is surfacing
This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.
Buzz score components · mention 19.5 · diversity 13.0 · KEV 0.0 · OTX 0.0 · PoC 0.0
Why it matters now
Mention timeline
- Total mentions
- 0
- within the 30d window
- Peak daily
- 0
- highest bucket
Evidence
Source links by recency
6 source links · newest first
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33943.jsonsecurity.access.redhat.com
No excerpt available.
Vendor Advisorysecurity.access.redhat.comMar 27, 2026, 10:16 PM - https://bugzilla.redhat.com/show_bug.cgi?id=2452522bugzilla.redhat.com
No excerpt available.
Exploitbugzilla.redhat.comMar 27, 2026, 10:16 PM - https://access.redhat.com/security/cve/CVE-2026-33943access.redhat.com
No excerpt available.
Vendor Advisoryaccess.redhat.comMar 27, 2026, 10:16 PM No excerpt available.
Exploitgithub.comMar 27, 2026, 10:16 PMNo excerpt available.
Exploitgithub.comMar 27, 2026, 10:16 PMNo excerpt available.
Exploitgithub.comMar 27, 2026, 10:16 PM
Exploit code
Public exploit repository references
Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.
0 repository references · best confidence N/A · max 0 stars
Related records
Similar CVEs
6 related CVEs with shared weakness or product evidence
- CVE-2026-2586CVSS 9.1 · Critical
An authenticated Remote Code Execution (RCE) vulnerability was identified in GlassFish's Administration Console. A user with access to the panel can send crafted requests that all…
- CVE-2026-39842CVSS 9.9 · Critical
OpenRemote is an open-source IoT platform. Versions 1.21.0 and below contain two interrelated expression injection vulnerabilities in the rules engine that allow arbitrary code ex…
- CVE-2026-33938CVSS 8.1 · High
Handlebars provides the power necessary to let users build semantic templates. In versions 4.0.0 through 4.7.8, the `@partial-block` special variable is stored in the template dat…
- CVE-2025-41243CVSS 10.0 · Critical
Spring Cloud Gateway Server Webflux may be vulnerable to Spring Environment property modification. An application should be considered vulnerable when all the following are true:…
- CVE-2023-42658CVSS 8.8 · High
Archive command in Chef InSpec prior to 4.56.58 and 5.22.29 allow local command execution via maliciously crafted profile.
- CVE-2022-22963CVSS 9.8 · Critical
In Spring Cloud Function versions 3.1.6, 3.2.2 and older unsupported versions, when using routing functionality it is possible for a user to provide a specially crafted SpEL as a…