What is CVE-2019-7249?

CVE-2019-7249 is a critical-severity vulnerability in Keybase, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 9.8/10. Published 2019-01-31.

How severe is CVE-2019-7249?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Keybase

CVE-2019-7249

In Keybase before 2.12.6 on macOS, the move RPC to the Helper was susceptible to time-to-check-time-to-use bugs and would also allow one user of the system (who didn't have root access) to tamper with another's installs.

Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)

Published 2019-01-31 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.025 (84.2th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 84.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.025 · newest: 0.025 · change: 0.000

Affected products

Keybase

Weakness classification (CWE)

CWE-367 — Time-of-check Time-of-use (TOCTOU) Race Condition

References

keybase.io/docs/secadv/kb004 (Exploit, Patch, Vendor Advisory)
www.securityfocus.com/bid/106824 (VDB Entry, Third Party Advisory, vdb-entry)
hackerone.com/reports/471739 (Exploit, Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2019-7249?: CVE-2019-7249 is a critical-severity vulnerability in Keybase, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 9.8/10. Published 2019-01-31.
How severe is CVE-2019-7249?: Critical severity. CVSS v3 base score is 9.8 out of 10.