CVE-2026-82217
AI Agent Mode path traversal allows host file write/delete, enabling backend RCE
Is CVE-2026-82217 being exploited?
Not confirmed. CVE-2026-82217 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.38% probability of exploitation in the next 30 days.
How severe is CVE-2026-82217?
CVE-2026-82217 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-82217?
Yes. A fix has been recorded for CVE-2026-82217. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-82217 affect?
CVE-2026-82217 affects Eclipse Theia 1.73.0 - 1.74.x, Agent Mode APIs: writeFileContent, suggestFileContent, replacement/state helpers. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-82217?
Upgrade Theia to >=1.75.0; disable Agent Mode or restrict model inputs and backend privileges
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Model-controlled paths permit write/delete of host files (../, absolute, ~), enabling backend code execution via shell startup or ~/.ssh/authorized_keys.
Patch when possible
- affected>= 1.73.0 and < 1.75.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.