CVE-2026-52877
Unvalidated external URIs in Electron app can open local files or launch registered handlers.
Is CVE-2026-52877 being exploited?
Not confirmed. CVE-2026-52877 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 0.37% probability of exploitation in the next 30 days.
How severe is CVE-2026-52877?
CVE-2026-52877 is rated High with a CVSS score of 8.3. 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-2026-52877?
Yes. A fix has been recorded for CVE-2026-52877. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-52877 affect?
CVE-2026-52877 affects Streambert < 2.6.0, Electron desktop apps using similar open-external IPC, Windows, macOS, and 1 further product or version. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-52877?
Upgrade Streambert to 2.6.0; validate/whitelist URI schemes; restrict untrusted renderer input.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Renderer-supplied URLs passed to shell.openExternal can invoke file: or custom-scheme handlers to open local files, access remote resources, or launch apps (potential RCE/data exposure).
Patch when possible
- affected< 2.6.0
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.