How to use this reference
The maintainer identifies 1.19.0 as patched. Editorial lesson: serialization safety depends on the actual browser context, including structural metadata and comment boundaries, rather than only visible text or conventional attributes. Review all server-to-client state representations and preserve the contract between their encoder and consumer. A patch for this mechanism is not proof that every application output path is safe.
Before reading
- Server-rendered HTML and browser parsing contexts
- Framework resumability and serialized component metadata
Context and limits
- CVE-2026-25148. Varixo published the advisory; wodzen is credited as reporter.
- The application prerequisite is user influence over dynamically populated virtual-node attribute names or values. The maintainer excludes hard-coded attributes.
- The package table names qwik, while the prose names qwik-city. Preserve this naming inconsistency rather than inferring package equivalence.
- Advisory publication is February 3, 2026. The exact software patch release date was not established and is not substituted into resource-edition chronology.
- The reviewed official core changelog contains a 1.19.0 section but does not independently explain this security fix. Remediation attribution rests on the maintainer advisory.
- No bounty is established. Learning prerequisites and generalized defensive guidance are editorial.
Sources and provenance
- Qwik SSR XSS via Unsafe Virtual Node Serialization QwikDev · reviewed 2026-10-03
- Qwik core changelog QwikDev · reviewed 2026-10-03
Record reviewed 2026-10-03. Snapshot d5550c789111. Open the complete JSON contract.