@theia/ai-registry (>=1.73.0-next.2, <=1.73.1), @theia/plugin-dev (>=1.66.0-next.0, <=1.73.1) +4 more potentially affected by CVE-2026-12609 via @theia/plugin-ext (>=1.66.0, <=1.73.1)

@theia/plugin-ext NPM version =1.66.0, =1.73.0-next.2, =1.66.0-next.0, =1.66.0-next.0, =1.66.0-next.0, =1.66.0-next.0, =1.66.0-next.0, =1.73.1 Source cves: CVE-2026-12609 Source advisory: SNYK:JS-THEIAPLUGINEXT-18565098...

EUVD-2026-53326

In Eclipse Theia versions up to and including 1.73.1, the @theia/filesystem backend binds POST /file-upload in every filesystem-enabled deployment. The handler takes an attacker-supplied absolute path from the multipart uri field and calls fs.movetmp, target, overwrite: true with no workspace...