CVE-2026-39847
Path traversal in Emmett up to 2.8.0 reads arbitrary files via /__emmett__/../ paths.
Is CVE-2026-39847 being exploited?
Not confirmed. CVE-2026-39847 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 0.50% probability of exploitation in the next 30 days.
How severe is CVE-2026-39847?
CVE-2026-39847 is rated Critical with a CVSS score of 9.1. 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-2026-39847?
Yes. A fix has been recorded for CVE-2026-39847. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-39847 affect?
CVE-2026-39847 affects Emmett framework (Python) versions 2.5.0–2.8.0. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-39847?
Upgrade to 2.8.1 or later.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Attacker can read local files by crafting requests to /__emmett__/../; could expose config, credentials, or sensitive data.
Patch when possible
- affected>= 2.5.0 and < 2.8.1
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.