CVE-2026-19884
Opening attacker repos in Theia can auto-run git-controlled commands leading to code execution.
Is CVE-2026-19884 being exploited?
Not confirmed. CVE-2026-19884 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 0.13% probability of exploitation in the next 30 days.
How severe is CVE-2026-19884?
CVE-2026-19884 is rated High with a CVSS score of 8.4. 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-2026-19884?
Yes. A fix has been recorded for CVE-2026-19884. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-19884 affect?
CVE-2026-19884 affects Eclipse Theia <= 1.69.0, Theia-based applications with git integration, @theia/git extension (deprecated), builtin VS Code git extension when embedded in Theia apps. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-19884?
Upgrade to Theia 1.70.0+, avoid opening untrusted repos or disable git integration.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Arbitrary command execution as the user by opening an attacker-supplied repository with a crafted .git/config that triggers git commands (e.g., core.fsmonitor).
Immediate action required
- affected< 1.70.0
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.